Journal articles on the topic 'Manure nutrient'
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1
Schoenau, J. J., and J. G. Davis. "Optimizing soil and plant responses to land-applied manure nutrients in the Great Plains of North America." Canadian Journal of Soil Science 86, no. 4 (August 1, 2006): 587–95. http://dx.doi.org/10.4141/s05-115.
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Animal manures are recognized as valuable sources of plant nutrients in cropping systems and also play a role in soil improvement through the input of organic matter. Using recent research examples from Saskatchewan and Colorado, this paper covers beneficial management practices for effective recycling of manure nutrients applicable to the Great Plains region of North America. Challenges in using animal manures as fertilizers include low nutrient content per unit weight, variability and availability of nutrient content, and a balance of available nutrients that often does not meet the relative nutrient requirements of the crop. Examples of imbalances that may arise requiring special management considerations include low available N content relative to available P for many solid manures, and low available S relative to N for some liquid manures. Application decisions are best supported by manure and soil analyses, with nutrient balance issues addressed by rate adjustments and the addition of supplemental commercial fertilizer to avoid deficiency or loading of specific nutrients. Placement of manure into the soil by injection or incorporation is desirable in that nutrient losses by volatilization and runoff are reduced and crop recovery is increased. Balancing the rate of nutrient application with crop requirement and removal over time is key to avoiding nutrient loading on soils receiving repeated applications of manure. Key words: Manure management, nutrient cycling, beneficial management practices, Great Plains
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Andersen, Daniel Steven, and Laura M. Pepple. "A County-Level Assessment of Manure Nutrient Availability Relative to Crop Nutrient Capacity in Iowa: Spatial and Temporal Trends." Transactions of the ASABE 60, no. 5 (2017): 1669–80. http://dx.doi.org/10.13031/trans.12417.
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Abstract. During the twentieth century, U.S. agriculture strived to achieve increased food production in order to satisfy both local and export demands. In many cases, this led to increased farm sizes and an operational separation of crop and livestock production. The trend of increasing centralization and industrialization of agriculture, specifically animal agriculture, has resulted in the concentration of waste products associated with animal production (manures and wash-down water) over relatively small geographic areas that are spatially segregated from crop production areas. Because the distance that manure can be economically hauled for land application has practical limits, the public is concerned that this spatial separation of crop and animal production areas could lead to over-application of manures near animal feeding facilities, and thus potentially increase the transport of nutrients to ground and surface waters. An aggregated analysis (statewide) of crop and animal production in Iowa suggests that about 30% to 40% of current nitrogen and phosphorus requirements for crop production could be supplied from manures and litters generated from livestock production, while about 50% of potassium requirements could be supplied. However, neither livestock nor crop production in Iowa is uniformly distributed across all counties. This unequal distribution suggests that a more disaggregated analysis of crop nutrient requirements and manure nutrient supply is necessary to estimate the risks of excess nutrient loss to the environment. Thus, we evaluated crop nutrient demand and manure and litter production at the county level to determine if excess manure generation is of concern and to locate areas where additional manures could be used. Results showed that several counties are becoming manure rich, but most locations maintain sufficient capacity to use manure nutrients effectively. Keywords: Crop nutrient capacity, Manure management, Manure production, Nutrient balance, Nutrient management.
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Bloukounon-Goubalan, Adin Y., Aliou Saïdou, Noël Obognon, Guillaume L. Amadji, Attanda M. Igué, Victor A. Clottey, and Marc Kenis. "Decomposition and nutrient release pattern of animal manures biodegraded by fly larvae in Acrisols." Canadian Journal of Soil Science 99, no. 1 (March 1, 2019): 60–69. http://dx.doi.org/10.1139/cjss-2018-0076.
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This study aims to assess the decomposition of manure biodegraded by fly larvae and the nutrient mineralization rates to understand the efficiency of the biodegraded manures for further use as soil amendment. A litter bag experiment was carried out over 75 d in an Acrisol in Benin using poultry manure, pig manure, mixture of poultry and sheep manure, mixture of poultry and cow manure, and mixture of poultry and pig manure, biodegraded by Musca domestica larvae. Nutrients content in the manures during the different stages of decomposition was analyzed. The mono-component exponential model Yt = Y0 × e−kt best described the manure decomposition and nutrients mineralization. The manures decomposed fast in the soil, and their nutrients were released fast in the poultry manure, the mixture of poultry and pig manure, and the mixture of poultry and cow manure. Nutrient mineralization increased in the order of P < N < K or N < P < K. Biodegradation of animal manures by fly larvae produced high-quality organic fertilizer through fast N and P release. This could aid in reducing the quantities of these elements applied as mineral fertilizer by farmers for sustaining agricultural soil productivity.
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Shepherd, M. A. "Managing manures in organic farming." Proceedings of the British Society of Animal Science 2003 (2003): 240. http://dx.doi.org/10.1017/s1752756200013958.
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Knowledge of manure composition is important for farm nutrient management, either if importing manure onto a farm or transferring nutrients around the farm in ‘home produced’ manures. Many factors affect the nutrient content of the manure ready to spread onto the land (Smith & Frost, 2000): dietary input and quality, nutrient losses during housing and storage and additions of bedding material and/or water. There are many reports of average values for manures from conventionally raised livestock (e.g. Anon., 2000 for the U.K.). However, there are less data available for manures produced on organic holdings. It is probable that composition will differ from conventionally produced manures because of differences in diet and manure storage methods (composting and/or long-term storage). Therefore, we aimed to test this under U.K. conditions by analysing cattle manures from organic holdings for comparison with data on conventionally produced manures.
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Potter, Philip, Navin Ramankutty, Elena M. Bennett, and Simon D. Donner. "Characterizing the Spatial Patterns of Global Fertilizer Application and Manure Production." Earth Interactions 14, no. 2 (January 1, 2010): 1–22. http://dx.doi.org/10.1175/2009ei288.1.
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Abstract Agriculture has had a tremendous impact on soil nutrients around the world. In some regions, soil nutrients are depleted because of low initial soil fertility or excessive nutrient removals through intense land use relative to nutrient additions. In other regions, application of chemical fertilizers and manure has led to an accumulation of nutrients and subsequent water quality problems. Understanding the current level and spatial patterns of fertilizer and manure inputs would greatly improve the ability to identify areas that might be sensitive to aquatic eutrophication or to nutrient depletion. The authors calculated spatially explicit fertilizer inputs of nitrogen (N) and phosphorus (P) by fusing national-level statistics on fertilizer use with global maps of harvested area for 175 crops. They also calculated spatially explicit manure inputs of N and P by fusing global maps of animal density and international data on manure production and nutrient content. Significantly higher application rates were found for both fertilizers and manures in the Northern Hemisphere, with maxima centered on areas with intensive cropland and high densities of livestock. Furthermore, nutrient use is confined to a few major hot spots, with approximately 10% of the treated land receiving over 50% of the use of both fertilizers and manures. The authors’ new spatial disaggregation of the rich International Fertilizer Industry Association (IFA) fertilizer-use dataset will provide new and interesting avenues to explore the impact of anthropogenic activity on ecosystems at the global scale and may also have implications for policies designed to improve soil quality or reduce nutrient runoff.
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Mbatha, Khulekani Cyprian, Charmaine Ntokozo Mchunu, Sydney Mavengahama, and Nontuthuko Rosemary Ntuli. "Effect of Poultry and Goat Manures on the Nutrient Content of Sesamum alatum Leafy Vegetables." Applied Sciences 11, no. 24 (December 15, 2021): 11933. http://dx.doi.org/10.3390/app112411933.
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Sesamum alatum Thonn. is one of the less-popular but nutritious leafy vegetables that is still collected from the wild or as weeds among crops in South Africa. The plant is also used in medicines and cosmetics in Africa and elsewhere. Despite its importance, the cultivation of S. alatum under different agronomic systems for improved harvestable yield and nutrient content is still lacking. The study aimed to determine the response of S. alatum nutrient content to the application of poultry and goat manures. Plants were grown in pots under rain-fed shade cloth conditions, with poultry and goat manures applied at 0, 1, 2, and 3 t ha–1 each, and they were laid in a completely randomized design. Shoot tips were harvested at 60 days after planting and analyzed for nutrient content. Shoots contained better nutrients in S. alatum plants grown during the first than the second season, with minor exceptions. Poultry and goat manure application led to an increase in Ca, Mg, K, P, and micro-nutrients. Goat manure had potential to increase the nutrient content in S. alatum than poultry manure, although differences were not substantial. Therefore, both manures could be equally used to improve nutrient content of S. alatum.
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Islam, Mohammad Rafiqul, Sultana Bilkis, Tahsina Sharmin Hoque, Shihab Uddin, Mohammad Jahiruddin, Mohammad Mazibur Rahman, Abu Bakkar Siddique, et al. "Mineralization of Farm Manures and Slurries under Aerobic and Anaerobic Conditions for Subsequent Release of Phosphorus and Sulphur in Soil." Sustainability 13, no. 15 (August 2, 2021): 8605. http://dx.doi.org/10.3390/su13158605.
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A good understanding of nutrient release from manure or compost after application through mineralization is important to assure meeting the nutrient demand of crops, to secure timely fertilizer application and to enhance nutrient use efficiency. The current study was done to evaluate phosphorus (P) and sulphur (S) release patterns from different types of manures viz. cow dung, cow dung slurry, tricho-compost, vermicompost, poultry manure, poultry manure slurry and mungbean residues. The mineralization study was performed under aerobic (field capacity) and anaerobic (waterlogging) conditions for 180 days at 25 ± 1 °C in the laboratory. The release of P and S showed the highest values within 75–180 and 75–150 days, respectively, and was always higher in aerobic conditions than in anaerobic conditions. The first-order kinetic cumulative model was a good fit for mineralization, which was significantly influenced by manure type, soil moisture level and incubation period. Poultry manure slurry exerted the highest P and S release under both moisture conditions. Both slurries showed higher potential mineralization, with a lower rate constant for these elements compared to that in their manure states. Hence, appropriate manures should be chosen and applied in the proper quantity to provide exact amounts of nutrients, to increase crops nutrient use efficiency and to formulate correct fertilizer recommendations.
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Aguirre-Villegas, Horacio A., Mahmoud A. Sharara, and Rebecca A. Larson. "Nutrient Variability Following Dairy Manure Storage Agitation." Applied Engineering in Agriculture 34, no. 6 (2018): 908–17. http://dx.doi.org/10.13031/aea.12796.
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Abstract. The nutrient profile in stored manure can be highly variable due to the solids building up at the bottom of the storage over time as unagitated manure is removed. This variability can lead to under- or over-application of nutrients potentially reducing crop yields or increasing nutrient losses, respectively. Agitation of stored manure is a common practice to re-suspend solids providing a more uniform nutrient consistency for application. This study explores the solids and nutrient variability in stored dairy manure after agitation and the relationship between the number of samples and the quality of the nutrient content estimate. A total of 16 dairy facilities across Wisconsin were sampled in the study. Samples were taken during agitation and analyzed for total solids (TS), total Kjeldahl nitrogen (TKN), total ammonia nitrogen (TAN), total phosphorus (TP), total potassium (TK), and microminerals. Overall, TKN, TAN, and TP contents were more uniform than TS. The mean concentrations (wet basis) from the 16 farms range from 2.45% to 15.28% for TS, 0.17% to 0.53% for TKN, 0.01% to 0.33 for TAN, 0.02 to 0.06 for TP, and 0.11% to 0.31% for TK. This range is mostly attributed to the between-farms variability in manure nutrient content. In addition, 54% of the total variation in the TS content was attributable to within-farm sample variability. These results show that TS was variable on farms whereas TKN, TAN, and TP were variable between farms. A random resampling analysis showed that three samples generate a mean between 20% to 30% of the true experimental mean for TKN and TAN whereas nine samples are required to be in this range for TP. Results show that the improvement achieved by adding more samples than 11 is less than 10%. Keywords: Dairy manure, Manure agitation, Nutrients, Nutrient variability, Sample size.
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Hoag, Dana L., and Fritz M. Roka. "Environmental policy and swine manure management Waste not or want not?" American Journal of Alternative Agriculture 10, no. 4 (December 1995): 163–66. http://dx.doi.org/10.1017/s088918930000641x.
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AbstractLivestock production and manure handling decisions often have been treated in the literature as separate enterprises. Policymakers, too, have ignored the interactive nature of manure management by focusing on land application for nutrient disposal. This study outlines a systems approach to describe the interrelated decisions producers face, using examples from North Carolina and Iowa that show how producers' attitudes toward manure management lead them to handle manure differently in different regions. In North Carolina, nutrients in manure are “not wanted.” There are economic incentives to treat manure, thus reducing its nutrient content, and to apply it on as little land as possible. In Iowa, nutrients are “not wasted.” Producers conserve the nutrients in manure and use them more fully, applying manure to higher value crops such as corn. Policies that influence manure management can be made more effective by accounting for the differences in producers' incentives to waste or want the nutrients.
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Feinerman, Eli, Darrell J. Bosch, and James W. Pease. "Manure Applications and Nutrient Standards." American Journal of Agricultural Economics 86, no. 1 (February 2004): 14–25. http://dx.doi.org/10.1111/j.0092-5853.2004.00559.x.
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Kumar, Vijay C., G. N. Gajanana, and B. Basavaraj. "Influence of Sources of Organic Manures on Availability of Micronutrients to Finger Millet (Eleusine coracana, Gaertn) in Alfisal." Mapana - Journal of Sciences 2, no. 2 (April 15, 2004): 8–13. http://dx.doi.org/10.12723/mjs.4.2.
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Field experiment was conducted on a sandy loam soil to know the periodic changes in DTPA extractable micro nutrients Zn,Fe,Cu and Mn with different sources of organic manures in conjunction with fertilizer were studied at 0-15 cm soil depth during finger mil;let growth. Application of organics alone or in combination with fertilizers significantly increased DTPA extractable micro nutrients when compared to NPK alone. Among the organic sources Farmyard Manure treated soil recorded maximum DTPA extractable micronutrients Zn,Fe,Cu, and Mn when compared to Green leaf manure and Vermicompost. With intensive cropping of high analysis fertilizer, soils are becoming deficient in micronutrients. Although some work has been reported in Punjab and other states on the effect of different sources of organic manures on the building up of nutrients and yield of crops, very little work has been done with respect to micro nutrient elements. The present studies were conducted to know the effect of different sources of organic manures on Micro nutrient availability in sandy loam soil in finger millet crop.
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Reddy, K. S., N. Kumar, A. K. Sharma, C. L. Acharya, and R. C. Dalal. "Biophysical and sociological impacts of farmyard manure and its potential role in meeting crop nutrient needs: a farmers." Australian Journal of Experimental Agriculture 45, no. 4 (2005): 357. http://dx.doi.org/10.1071/ea03225.
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Cropping in Madhya Pradesh, Central India, experiences an overall nutrient deficit of about 1 Mt of nitrogen (N), phosphorus (P) and potassium (K) annually. In addition to increasing the supply of inorganic fertilisers, the balance between inputs and losses must also be met by indigenous organic sources such as farmyard manure. Although large amounts of animal dung are produced in India, less than 50% of this is currently used to produce farmyard manure. With the objective of increasing manure production and manure nutrient use in cropping, we surveyed 100 farmers from 4 randomly selected villages in Madhya Pradesh to: record perceptions and attitudes towards farmyard manure use for crop production; estimate nutrient balances; and test fields for concentrations of soil organic carbon (C), nitrogen, and available nutrients. All farmers’ field soils were low in organic C and available N, although available P, zinc and iron occurred in low to medium concentrations. However, the majority of farmers under-fertilised their crops, resulting in a negative nutrient balance; 0.9 Mt of NPK in 1997–98, which is predicted to increase to 1.8 Mt by 2020 over a 19 × 106 ha cropped area in Madhya Pradesh. All of the farmers surveyed believed that added farmyard manure improved their soil productivity and the majority also believed that farmyard manure increased crop yields; favourably affecting soil physical conditions and water-holding capacity. However, most farmers were not aware of the contribution of farmyard manure to plant nutrients. The major constraint listed by all the surveyed farmers was the insufficient quantity of farmyard manure available for field application. Its production was restricted by the competitive use of about 50% of cattle dung as a domestic fuel. The marginal farmers (<0.9 ha farm size) expressed their unwillingness to shift to other fuel sources, presumably due to limited cash flow from the farm, however 58–85% of farmers with larger holdings (0.9–25 ha) were receptive to using alternative fuel sources such as liquid petroleum gas. Although the nutrient content of farmyard manure was found to be relatively low (about 7.6 kg N/t dry farmyard manure), use of all animal dung for manure should be encouraged by introducing liquid petroleum gas supply in villages. This would help to reverse the negative nutrient balance in Madhya Pradesh soils via an integrated nutrient management approach (utilisation of all nutrient sources and optimisation of crop nutrient requirements).
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Prado, Joana, David Fangueiro, Paula Alvarenga, and Henrique Ribeiro. "Assessment of the Agronomic Value of Manure-Based Fertilizers." Agronomy 13, no. 1 (December 31, 2022): 140. http://dx.doi.org/10.3390/agronomy13010140.
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Producing manure-based fertilizers (MBFs) with specific nutrient ratios is a solution to overpassing the imbalance of nitrogen and phosphorus in manures, and a way to recycle manure’s nutrients, promoting sustainable agricultural practices. Several MBFs with different tailored N:P ratios (0.5:1, 1:1 and 2:1) were produced to determine their agronomic value in a pot experiment with oat (0.5:1 ratio: cattle manure with pig slurry (CaM+PiS), cattle manure with poultry manure (CaM+PoM) and poultry manure with superphosphate (PoM+SP); 1:1 ratio: poultry manure with cattle slurry (PoM+CaS) and poultry manure with pig slurry (PoM+PiS); 2:1 ratio: cattle slurry with the liquid fraction of cattle slurry (CaS+CaS-LIQ), pig slurry with the liquid fraction of pig slurry (PiS+PiS-LIQ) and poultry manure with urea (PoM+U)). The performance of these MBFs was compared with conventional mineral fertilizers (MFs) in sandy soils (Haplic Arenosols) with different nutrient requirements. Oat fertilized with PoM+SP (0.5:1) and PoM+PiS (1:1) led to yields similar to those obtained with the use of MFs (6.3 and 7.2 mg DM, respectively). The MBFs PoM+SP and PoM+PiS, as well as PiS+PiS-LIQ (2:1), were agronomically equivalent to the MFs. N uptake with those MBFs was equivalent to that obtained with the MFs. Replacing MFs with MBFs in the basal fertilization of oat was demonstrated to be a solution to turn agriculture more sustainable by recycling nutrients efficiently.
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Randhawa, Mehakpreet Kaur, Salwinder Singh Dhaliwal, Vivek Sharma, Amardeep Singh Toor, Sandeep Sharma, Manpreet Kaur, and Gayatri Verma. "Nutrient Use Efficiency as a Strong Indicator of Nutritional Security and Builders of Soil Nutrient Status through Integrated Nutrient Management Technology in a Rice-Wheat System in Northwestern India." Sustainability 13, no. 8 (April 20, 2021): 4551. http://dx.doi.org/10.3390/su13084551.
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Nutrient use efficiency is reported as a strong indicator of the buildup soil nutrient status for nutritional security of crops through an integrated nutrient management approach under a rice-wheat system. The data revealed that integrated application of manures and fertilizers reported maximum organic carbon (0.39%) in the treatment receiving 100% of the recommended dose of fertilizers (RDF) + farmyard manure and lowering the pH to 6.39. The maximum available N (360.8 kg ha−1) was found in 100% RDF + press mud treatment; available P (66.30 kg ha−1) was found in 75% RDF + poultry manure; and available K, Zn, Cu, and Fe (226.3 kg ha−1 and 2.220, 0.732, and 36.87 mg kg−1, respectively) in 100% RDF + farmyard manure treatments. Similarly, total macro- and micronutrient content in soil increased with the addition of organic manures alone or in combination with chemical fertilizers. The highest agronomic efficiency and utilization efficiency of nitrogen (41.83 and 102.55 kg kg−1, respectively) and phosphorous (83.57 and 204.9 kg kg−1, respectively) were recorded in the treatment receiving 75% RDF + poultry manure. This study concluded that the integrated application of manures and chemical fertilizers is a must for improving soil nutrient status and nutrient use efficiency and ultimately enhances nutritional security under a rice-wheat system.
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van Vliet, L. J. P., B. J. Zebarth, and G. Derksen. "Effect of fall-applied manure practices on runoff, sediment, and nutrient surface transport from silage corn in south coastal British Columbia." Canadian Journal of Soil Science 82, no. 4 (November 1, 2002): 445–56. http://dx.doi.org/10.4141/s01-041.
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Runoff from manured cropland during the wet fall and winter season, when 70% of the annual rainfall occurs, is a surface water quality concern in the Lower Fraser Valley of British Columbia. This study compares different fall-manure application strategies on runoff and contaminant transport from silage corn (Zea mays) land. The treatments were (i) a control, which did not receive manure in the fall; (ii) manure broadcast in the fall on corn stubble; and (iii) manure broadcast in the fall on corn stubble with an established relay crop. Runoff, solids, and nutrients loads from natural precipitation were measured on replicated experimental plots (0.0125 ha) from 1996 to 1998. Fall-applied manure on 3–5% sloping silage cornland without a relay crop resulted in a high risk to surface water quality, due to high suspended solid loads of between 7 and 14 Mg ha-1 yr-1 and high nutrient transport with mean annual total Kjeldahl N (TKN) P, and K loads of 98, 21, and 63 kg ha-1, respectively. Compared with no relay crop, intercropping silage corn with a relay crop of Italian ryegrass (Lolium multiflorum) reduced the mean annual runoff and suspended solid load by 53 and 74%, respectively, TKN load by 56%, P load by 42%, K load by 31%, and Cu load by 57%. Even though total nutrient loads were lower with the relay crop treatment, all fall manure treatments including the relay crop resulted in nutrient loads above guidelines for the first three runoff events immediately following application. Key words: Runoff, suspended solids, nutrient loads, relay crop, cover crop, silage corn, manure
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Banik, Chumki, Jacek A. Koziel, Darcy Bonds, Asheesh K. Singh, and Mark A. Licht. "Comparing Biochar-Swine Manure Mixture to Conventional Manure Impact on Soil Nutrient Availability and Plant Uptake—A Greenhouse Study." Land 10, no. 4 (April 3, 2021): 372. http://dx.doi.org/10.3390/land10040372.
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The use of swine manure as a source of plant nutrients is one alternative to synthetic fertilizers. However, conventional manure application with >90% water and a low C:N ratio results in soil C loss to the atmosphere. Our hypothesis was to use biochar as a manure nutrient stabilizer that would slowly release nutrients to plants upon biochar-swine manure mixture application to soil. The objectives were to evaluate the impact of biochar-treated swine manure on soil total C, N, and plant-available macro- and micronutrients in greenhouse-cultivated corn (Zea mays L.) and soybean (Glycine max (L.) Merr.). Neutral pH red oak (RO), highly alkaline autothermal corn stover (HAP), and mild acidic Fe-treated autothermal corn stover (HAPE) biomass were pyrolyzed to prepare biochars. Each biochar was surface-applied to swine manure at a 1:4 (biochar wt/manure wt) ratio to generate mixtures of manure and respective biochars (MRO, MHAP, and MHAPE). Conventional manure (M) control and manure-biochar mixtures were then applied to the soil at a recommended rate. Corn and soybean were grown under these controls and treatments (S, M, MRO, MHAP, and MHAPE) to evaluate the manure-biochar impact on soil quality, plant biomass yield, and nutrient uptake. Soil organic matter significantly (<0.05) increased in all manure-biochar treatments; however, no change in soil pH or total N was observed under any treatment. No difference in soil ammonium between treatments was identified. There was a significant decrease in soil Mehlich3 (M3) P and KCl extractable soil NO3− for all manure-biochar treatments compared to the conventional M. However, the plant biomass nutrient concentrations were not significantly different from control manure. Moreover, an increasing trend of plant total N and decreasing trend of P in the plant under all biochar-manure treatments than the controls were noted. This observation suggests that the presence of biochar is capable of influencing the soil N and P in such a way as not to lose those nutrients at the early growth stages of the plant. In general, no statistical difference in corn or soybean biomass yield and plant nutrient uptake for N, P, and K was observed. Interestingly, manure-biochar application to soil significantly diluted the M3 extractable soil Cu and Zn concentrations. The results attribute that manure-biochar has the potential to be a better soil amendment than conventional manure application to the soil.
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Lopes, Vauvenargues, Suzan Kelly Vilela Bertolucci, Alexandre Alves de Carvalho, Heitor Luiz Heiderich Roza, Felipe Campos Figueiredo, and José Eduardo Brasil Pereira Pinto. "Improvement of Cymbopogon flexuosus Biomass and Essential Oil Production With Organic Manures." Journal of Agricultural Science 11, no. 2 (January 15, 2019): 169. http://dx.doi.org/10.5539/jas.v11n2p169.
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Cymbopogon flexuosus is a medicinal species with relevant commercial value and widely used in flavors, fragrances, toiletries, cosmetics, soaps, detergents, and pharmaceutical products. The objective of this study was evaluate the effects of different doses and sources of two manures and one compost on plant growth, leaf nutrient accumulation, content, yield, and chemical composition of the essential oil. The sources were cattle manure, quail manure, and organic compost applied in four doses and control treatment. The species increased the growth and productions of secondary metabolites by use the manures and organic compost. The highest weight gain was obtained with fertilization between 300 and 450 g pot-1 of quail manure, but the yield of essential oil in the doses from 150 to 300 g pot-1. Overall, lemon grass plants fertilized with quail manure accumulated greater concentrations of nutrients in leaf tissue than cattle manure and compost. The neral content in the essential oil was increased with the use of quail manure compared to compost and cattle manure. The results from this study demonstrated that dose and source can alter dry weight, leaf nutrients accumulation, and essential oil content and yield.
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Ribaudo, Marc, and Jean Agapoff. "Importance of Cost Offsets for Dairy Farms Meeting a Nutrient Application Standard." Agricultural and Resource Economics Review 34, no. 2 (October 2005): 173–84. http://dx.doi.org/10.1017/s1068280500008340.
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The U.S. Environmental Protection Agency requires concentrated animal feeding operations to develop and implement a comprehensive nutrient management plan. Changes in manure management to meet nutrient application standards will generally increase production costs. Some of these costs can be offset by savings from replacing commercial fertilizer with manure nutrients, and through financial assistance programs such as the U.S. Department of Agriculture's Environmental Quality Incentives Program (EQIP). A manure application cost model was used to examine the costs to confined dairy farms of meeting nutrient application standards, and the ability of fertilizer offsets and EQIP to reduce these costs.
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Islam, Mohammad Rafiqul, Sultana Bilkis, Tahsina Sharmin Hoque, Shihab Uddin, Mohammad Jahiruddin, Mohammad Mazibur Rahman, Mohammad Mahmudur Rahman, Majid Alhomrani, Ahmed Gaber, and Mohammad Anwar Hossain. "Mineralization of Farm Manures and Slurries for Successive Release of Carbon and Nitrogen in Incubated Soils Varying in Moisture Status under Controlled Laboratory Conditions." Agriculture 11, no. 9 (September 3, 2021): 846. http://dx.doi.org/10.3390/agriculture11090846.
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Having up-to-date knowledge on the mineralization of organic materials and release of nutrients is of paramount significance to ensure crops’ nutrient demands, increase nutrient use efficiency and ensure the right fertilizer application at the right time. This study seeks to evaluate the mineralization patterns of various manures viz. cowdung (CD), cowdung slurry (CDSL), trichocompost (TC), vermicompost (VC), poultry manure (PM), poultry manure slurry (PMSL), and mungbean residues (MR). The objective being to establish their efficiency in releasing nutrients under aerobic (field capacity) and anaerobic (waterlogging) conditions. The incubation experiment was designed using a Completely Randomized Design (CRD) that took into account three variables: Manures, soil moisture, and incubation period. The mineralization of carbon (C) and nitrogen (N) ranged from 11.2 to 100.1% higher under aerobic conditions rather than anaerobic ones. The first-order kinetic model was used to mineralize both elements. C mineralization was 45.8 to 498.1% higher in an amount from MR under both moisture conditions. For N release, MR and PM exerted maximum amounts in anaerobic and aerobic scenarios, respectively. However, the rate of C and N mineralization was faster in TC compared to other manures in both moisture conditions. Although TC was 1.4 to 37.7% more efficient in terms of rapidity of mineralization, MR and PM performed better concerning the quantity of nutrient release and soil fertility improvement. PM had 22–24% higher N mineralization potential than PMSL while CDSL had 46–56% higher N mineralization potential than CD. C and N mineralization in soil was greater under aerobic conditions compared to what occurred in the anaerobic context. Depending on mineralization potential, the proper type and amount of manure should be added to soil to increase crops’ nutrient use efficiency, which in turn should lead to better crop production.
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Ferreira, Paulo Ademar Avelar, Carlos Alberto Ceretta, Cledimar Rogério Lourenzi, Lessandro De Conti, Carina Marchezan, Eduardo Girotto, Tadeu Luis Tiecher, Natália Moreira Palermo, Léon-Étienne Parent, and Gustavo Brunetto. "Long-Term Effects of Animal Manures on Nutrient Recovery and Soil Quality in Acid Typic Hapludalf under No-Till Conditions." Agronomy 12, no. 2 (January 19, 2022): 243. http://dx.doi.org/10.3390/agronomy12020243.
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No-till farming and manure application are means of storing carbon in soil and increasing soil quality. However, the organic fertilization of no-till soils may sustain subtropical agroecosystems for only a limited period until the soil quality declines. The C, N, P, and other nutrient cycles are perturbed due to the nutrient imbalance in manures and their application on the soil surface, which poses a risk for nutrient dispersion into the environment. Long-term N-based manure application also impacts the apparent nutrient recovery (ANR) by crops and, hence, the crop quality. Our objective was to monitor changes in soil quality and to measure nutrient recovery from N-based organic fertilization in a Brazilian agroecosystem. A long-term experiment was established in May 2004 on Typic Hapludalf soil in Southern Brazil. The experiment comprised two periods: 2004–2009 and 2009–2020. The treatments were unfertilized (control), pig slurry, pig deep litter (swine manure and rice husk), cattle slurry, and mineral fertilizer (urea, triple superphosphate, and K chloride). Grain and cover crops were grown. The maize grain yield and oat biomass were used as indicators of productivity. The application of cattle slurry, pig deep litter, and pig slurry increased the grain production by 20% on average compared to mineral fertilization. Organic manuring increased the soil pH by up to one unit, while urea acidified the soil. The highest crop yields were obtained with pig deep litter, which increased the levels of P, K, Ca, Mg, and C in the soil test. Pig deep litter showed the highest N-ANR for the aboveground part of the plants. The ANRs for P, K, Ca, and Mg were also highest when pig slurry had been applied. The ANR values for the micronutrients varied widely among the organic sources but indicated large marginal offtake gains compared to mineral fertilization. The N-based fertilization with animal manures increased the rate of nutrient uptake by plants but led to an accumulation of nutrients in the soil, threatening the sustainability of the system. Manure applications must be monitored regularly to avoid the accumulation of nutrients that could impair the soil quality and become an environmental problem in the future.
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Larney, Francis J., Dan M. Sullivan, Katherine E. Buckley, and Bahman Eghball. "The role of composting in recycling manure nutrients." Canadian Journal of Soil Science 86, no. 4 (August 1, 2006): 597–611. http://dx.doi.org/10.4141/s05-116.
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Recently, composting has been gaining increased attention as an alternative means of handling manure generated by the livestock industry. Composting is not a new technology, it merely controls what is a natural decomposition process. A major advantage of composting is reduced mass, volume and water content compared with fresh manure which in turn reduces transportation requirements. Concomitant benefits include elimination of pathogens, parasites, weed seeds and odour emissions on land application. However, carbon (C) and nitrogen (N) losses and greenhouse gas (GHG) emissions are associated with composting. Nutrients are stabilized during composting which slows their release once soil-applied. Compost also enhances soil physical and biological properties and has a disease suppression effect. Where the supply of manure currently exceeds land availability for application, or in some future scenario, if producers need to comply with stricter manure application rate regulations, composting may be an option to encourage nutrient export from high-loading watersheds to soils that may benefit from nutrient and organic matter inputs. Composting may be seen as a means of maximizing the potential for recycling manure nutrients by soils and crops while protecting surface and groundwater resources from manure-related contamination. Key words: Manure, compost, nutrients, cropping systems, soil quality
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Irin, IJ, PK Biswas, MJ Ullah, TS Roy, and MA Khan. "Influence of Green Manuring Crops on Dry Matter Production and Soil Health Improvement." Bangladesh Agronomy Journal 22, no. 1 (January 7, 2020): 39–45. http://dx.doi.org/10.3329/baj.v22i1.44929.
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The field experiment was conducted at the Agronomy farm of Sher-e-Bangla Agricultural University to evaluate the impact of different kind of green manures on soil nutrient balance through adding biomass and N,P and K accumulation. Green manuring crops were incorporated after in situ cultivation and results showed that, the biomass incorporation increased the N production in soil. The biomass from Sesbania rostrata, Sesbania aculeata and Crotalaria juncea gave the higher dry matter and nutrient status. Incorporation of Sesbania rostrata and Sesbania aculeata added more organic matter and nitrogen to the soil after green manure incorporation than the prior soil. However, the improved soil quality was recorded with S. rostrata and S. aculeata followed by C. juncea and V. unguiculata incorporation as compared to control (no green manure) and other green manuring crops. The nutrient balance of soil after incorporation of different green manuring crops specially S. rostrata, S. aculeata and C. juncea showed positive balance of nutrients than other green manures.
Bangladesh Agron. J. 2019, 22(1): 39-45
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Talgre, L., E. Lauringson, H. Roostalu, A. Astover, and A. Makke. " Green manure as a nutrient source for succeeding crops." Plant, Soil and Environment 58, No. 6 (June 18, 2012): 275–81. http://dx.doi.org/10.17221/22/2012-pse.
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The trials were carried out in the Estonian University of Life Sciences (58°23'N, 26°44'E), and studied to what extent green manure crops bind nutrients and the effect and stability of biologically fixed nitrogen (N). Our research covered more species than most of the earlier studies in the Nordic countries. Compared with biomass from unfertilized barley, legume undersowing, straws plus roots added up to 4 times more N, 2.8 times more phosphorus (P) and 2.5 times more potassium (K) returning to the soil. Red clover, hybrid lucerne and white melilot as pure sows produced the highest biomass, amounts of N, P, and K being up to 206, 24 and 144 kg/ha, respectively. The effect of additional N in soil was measured by weighing successive grain yields. In the first test year, 1 kg of N from green manure had the effect of producing 8.6 kg grain and this relation did not change even for higher N amounts. Green manure had a significant effect even in the third year after the green manure was ploughed into soil.
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Plūme, Imants. "REDUCTION OF LEAKAGE FROM ORGANIC MANURE." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (June 20, 2001): 138. http://dx.doi.org/10.17770/etr2001vol1.1948.
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Environmental problems of leakage minimisation from solid manure handling in Latvia are discussed. Volume and composition of leakage from solid manure are investigated in storage period. Amount of plant nutrients in effluents are measured 0,099 kg nitrogen, 0,029 kg phosphorus and 0,381 kg potassium per tonne manure in 14-day period of accumulation and storage of solid manure in trailer. Plant nutrients losses in effluent from densely stockpiled manure are 0,40 kg nitrogen, 0,197 kg phosphorus and 1,372 kg potassium per tonne manure in 5— moth storage period while leakage were occurred. In first 2— month period nutrient losses are 74 % nitrogen, 54 % phosphorus and 54 % potassium of whole amount of losses in 5-month period. Proposed recommendations are aimed to minimise the leakage from solid manure in farms in Latvia.
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Strahm, T., Joseph P. Harner, David V. Key, and James P. Murphy. "Nutrient analysis of sandladen dairy manure." Kansas Agricultural Experiment Station Research Reports, no. 2 (January 1, 1999): 43–45. http://dx.doi.org/10.4148/2378-5977.2949.
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INGOLD, MARIKO, SASKIA SCHMIDT, HERBERT DIETZ, RAINER GEORG JOERGENSEN, EVA SCHLECHT, and ANDREAS BUERKERT. "TANNINS IN GOAT DIETS MODIFY MANURE TURNOVER IN A SUBTROPICAL SOIL." Experimental Agriculture 54, no. 5 (July 24, 2017): 655–69. http://dx.doi.org/10.1017/s0014479717000291.
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SUMMARYQuality of animal manure as a nutrient source for crops and as a soil conditioner depends on how fast the organic matter is decomposed, releasing plant nutrients or building up the soil organic matter (SOM) pool. This turnover process is governed by manure composition, soil temperature, soil moisture and secondary metabolites in the manure such as tannins. To investigate the turnover and nutrient release from tannin-containing manure, a litterbag experiment was conducted in an irrigated lowland soil of northern Oman. A standardized quebracho tannin extract (QT) was either added to the goats’ diet and defecated with manure (QTf), or added to manure in a QT water suspension (QTc) prior to field application. Litterbags were installed within a two-year field experiment at 10-cm depth at the beginning of a consecutive sweet corn and radish cultivation, followed by their recovery every 2-–6 weeks until crop harvests. The litterbags contained pure goat manure (control) and the two types of QT-amended goat manure. Generally, QT increased OM remaining in litterbags at sampling by up to 22% compared with the control. QT reduced relative C, N, P and K release by 10% to 63% compared with the control, but effects were contradictory under sweet corn and radish. While under radish, both QT treatments reduced or tended to reduce C, N, P and K release from manure, QTc even increased N and P release under sweet corn. QTf, on the other hand, did not affect C, P and K release under sweet corn, whereas N release was reduced by 36–63% under both crops. As quebracho tannins in goat manure slowed down organic matter decomposition and reduced nutrient release, they may be useful agents in manure application to increase SOM pools and soil nutrient pools. However, the immobilization particularly of N by tannins can reduce the availability of this nutrient to crops.
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Sanford, Joseph R., Rebecca A. Larson, and Matthew F. Digman. "Assessing Certified Manure Analysis Laboratory Accuracy and Variability." Applied Engineering in Agriculture 36, no. 6 (2020): 905–12. http://dx.doi.org/10.13031/aea.14214.
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HighlightsManure analysis proficiency laboratories were assessed for accuracy and precision.Total nitrogen analysis was accurate and precise and is a strength of industry.Ammonium analysis resulted in most variability in laboratory results.Phosphorus and potassium mean comparison indicated significant differences between lab results.Abstract.Nutrient management planning (NMP) is an effective method for ensuring proper nutrient applications to agricultural fields. At livestock facilities, quantifying manure nutrient content is crucial for producers to obtain accurate and precise data to properly apply nutrients to the field to optimize crop yields while minimizing nutrient losses to the environment. In this study, eight manure analysis proficiency program (MAP) certified laboratories each received six replicates of four manure samples (two dairy and two swine) and analyzed for total solids (TS), total nitrogen (TN), ammoniacal nitrogen (NH4-N), phosphate (P2O5), and potash (K2O). Laboratories were compared using the MAP robust statistics comparison approach and a one-way ANOVA using laboratory means. Total nitrogen analysis had high precision and accuracy across laboratories selected for analysis. However, laboratories had less accuracy and precision in determining NH4-N concentrations. Additionally, while P2O5 and K2O met MAP standards for accuracy and precision, there was concerns for reading accuracy, as the median absolute deviation (MAD) to overall median ratio was high (ranging from 5.9% to 14.4%) and many of the laboratory means were statistically different. Keywords: Laboratory variability, Manure, Nutrient analysis.
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Ronga, Domenico, Paolo Mantovi, Maria Teresa Pacchioli, Andrea Pulvirenti, Francesco Bigi, Giulio Allesina, Simone Pedrazzi, Aldo Tava, and Aldo Dal Prà. "Combined Effects of Dewatering, Composting and Pelleting to Valorize and Delocalize Livestock Manure, Improving Agricultural Sustainability." Agronomy 10, no. 5 (May 8, 2020): 661. http://dx.doi.org/10.3390/agronomy10050661.
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An agronomic strategy to mitigate climate change impact can be the build-up of soil organic carbon. Among agronomic management approaches, the administration of organic fertilizers like livestock manure represents an effective strategy to increase soil organic carbon. However, livestock manure usually contains a high amount of water, reducing its sustainable delocalization and impacting on greenhouse gas emissions and nutrient leaching. Furthermore, the possible presence of weed seeds and harmful microorganisms could reduce the agronomic value of the manure. To overcome these issues, the combined effects of dewatering, composting and pelleting were investigated on livestock manure to produce sustainable organic fertilizers. Our results showed that composting and pelleting can represent a feasible and sustainable solution to reduce the potential risks related to the presence of weed seeds and harmful bacteria, concentrating nutrients and allowing a sustainable valorization and delocalization of the livestock manure. In addition, the processed manures were assessed as fertilizers in the growing medium (GM), displaying an increase in water retention and nutrient availability and a decrease of GM temperature and weed seed emergences. However, further study is needed to validate, both in open field and greenhouse productions, the effects of the proposed fertilizers in real cropping systems.
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Otieno, Hillary M. O., George N. Chemining’wa, and Shamie Zingore. "Effect of Farmyard Manure, Lime and Inorganic Fertilizer Applications on Soil pH, Nutrients Uptake, Growth and Nodulation of Soybean in Acid Soils of Western Kenya." Journal of Agricultural Science 10, no. 4 (March 5, 2018): 199. http://dx.doi.org/10.5539/jas.v10n4p199.
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Soybean is an important crop with nutrition, economic and soil fertility improvement benefits to farmers. However, its production in western Kenya is partly constrained by low soil pH and soil fertility levels. A greenhouse pot study was conducted to evaluate the effects of inorganic fertilizers, farmyard manure and lime application on soil pH, nutrient uptake, growth and nodulation of soybean grown in acidic soils from western Kenya. The experiment was set up in a randomized complete block design with eight treatments: control; NPK; manure; lime; manure+lime; NPK+manure; NPK+lime and manure+lime+NPK. Significant effects of inorganic fertilizers, manure and lime applications were observed on all the variables. Manure, lime and manure+lime treatments increased soil pH by 1.33, 2.19 and 2.28, respectively, above the control treatment. The shoot N was lower under control (1.71-1.81%), NPK (1.85-1.98%) and manure (2.00-2.11%) than under all other treatments. Treatments NPK+lime and manure+lime+NPK recorded higher uptake of P and K nutrients than all other treatments. The control and NPK treatments recorded shorter plants and low leaf area and above-ground biomass compared to other treatments. The NPK+lime and manure+lime+NPK treatments recorded higher plant height and aboveground biomass than other treatments. Lime+manure treatment recorded highest nodule numbers and dry weights per plant. Positive relationships were observed between pH and N, P and K nutrient uptake (R2 ranged between 0.30 and 0.77) and between biomass and N, P and K nutrient uptake (R2 ranged between 0.68 and 0.99). From this study, use of manure and lime could result in improved soil pH for better uptake of nutrients, nodule formation and productivity of soybean in Western Kenya.
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Fanjaniaina, Marie Lucia, Fabien Stark, Noelly Phostin Ramarovahoaka, Jeanny Fiononana Rakotoharinaivo, Tovonarivo Rafolisy, Paulo Salgado, and Thierry Becquer. "Nutrient Flows and Balances in Mixed Farming Systems in Madagascar." Sustainability 14, no. 2 (January 16, 2022): 984. http://dx.doi.org/10.3390/su14020984.
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Mixed farming systems are still prevalent in sub-Saharan Africa. In these systems, the recycling of nutrients through crop-livestock integration (CLI) practices is crucial for the sustainability of soil fertility and crop production. The objective of this study was to analyze nutrient (N, P, K) flows and balances of mixed farming systems to assess CLI contribution to the performance of those systems. We hypothesized that more intensive farms had a better nutrient balance at the farm level, and that improved biomass management methods improved their nutrient balance. Nine farms in the Madagascar highlands were selected, some corresponding to poor traditional farms with only draft cattle; some small or medium-sized, more intensive farms with a dairy herd; and some of the latter with some improvement to management methods of livestock effluents (manure composting, liquid manure collection). The nutrient balance of the farming systems was determined, and performance indicators were calculated at both farming, livestock, and CLI levels. Results showed that nutrient recycling through CLI is significant in the functioning of the systems studied, contributing primarily to circulating nutrient flows (up to 76%) and leading to greater efficiency and productivity. Nutrient flows resulting from these practices mainly concerned animal feeding (higher than 60% of nutrient flows), even if manure management was central for crop fertilization and that manure remained a desired animal product of these types of farms (up to 100% of animal products). Large negative balances of N and K (up to 80% of inputs) were observed in traditional livestock systems with draft cattle. They were smaller (39–68%) in more intensive dairy farms. Composting of manure did not decrease negative balances, whereas their magnitude was significantly reduced by the collection of liquid manure (19% for N; 42% for K). Better management of biomass at the farm level, in particular the collection of liquid manure, seemed to substantially reduce nutrient losses in MFS.
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N’Dayegamiye, Adrien. "Response of silage corn and wheat to dairy manure and fertilizers in long-term fertilized and manured trials." Canadian Journal of Soil Science 76, no. 3 (August 1, 1996): 357–63. http://dx.doi.org/10.4141/cjss96-043.
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Silage corn (Zea mays L.) and wheat (Triticum aestivum L.) were grown (1987–1991) in trials that had been manured and fertilized since 1978 to evaluate the effects of annual N, P, K and Mg fertilizers and dairy cattle manure on yields and nutrient uptake. Manure as the main factor was applied at 0 and 20 Mg ha−1 on a wet-weight basis. The subplots consisted of six fertilizer treatments: NK, PK, NP, NPK, NPKMg and the unfertilized control. For silage corn, fertilizer rates were 150, 100, 150 and 40 kg ha−1 N, P2O5, K2O and Mg, respectively. Fertilizer rates for wheat were 80, 100, 120 and 40 kg ha−1 N, P2O5, K2O and Mg, respectively. In manured plots, reduced N rates were applied for silage corn (100 kg N ha−1) and wheat (50 kg N ha−1). Silage corn and wheat yields and nutrient uptake were significantly increased by manure, N and K fertilizers whereas P and Mg effects were limited. A N-K synergistic effect on yields and nutrient uptake was observed both for silage corn and wheat. Application of K fertilizer significantly reduced silage corn Mg uptake without limiting yields, while it increased wheat yields and Mg uptake. Reduced N rates applied to silage corn and wheat achieved maximum yields and nutrient uptake in long-term manured treatments. Crop response to fertilizer application varied with crop species and was higher for silage corn than for wheat. Fertilizer adjustment is necessary after a long-term fertilizer or manure application. Key words: Silage corn, wheat, yields, nutrient uptake, manure, fertilizers, long-term, response to fertilizers
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Basnet, Manoj, Shanta Man Shakya, and Bandhu Raj Baral. "Response of organic manures on post harvest and soil nutrient restoration on cauliflower production." Journal of Agriculture and Environment 18 (May 12, 2018): 67–72. http://dx.doi.org/10.3126/aej.v18i0.19891.
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This study was conducted at Ilam Municipality-2, Nepal to determine the response of organic manures on post harvest and nutrient restorative effect of cauliflower. Five manures, viz., bansoon, mustard oil cake, poultry manure, farmyard manure, and vermi-compost were evaluated. The postharvest losses, vitamin C content and soil nutrient restorative behavior were significantly highest with vermi-compost as compared to other manures. The maximum vitamin C content of 10.92 mg/100 gm was found with vermi-compost whereas the lowest of 9.66 mg/100 gm was found at farmyard manure. Moreover, the physiological losses were found to be least with vermi compost and the most with bansoon manure. Moreover, the restorative properties i.e. pH, N,P,K and organic %age were found to be significantly highest with vermi-compost as compared to other organic manures. This study concludes that vermi compost increases vitamin C content, postharvest longevity and improvement of physical and chemical properties of the soil.
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Roy, Anup, Md Abdur Rahman Sarkar, Afrina Rahman, and Swapan Kumar Paul. "Effect of age of seedlings at staggered planting and nutrient management on the growth performance of aromatic fine rice (Oryza sativa L. cv. BRRI dhan38)." Archives of Agriculture and Environmental Science 5, no. 2 (June 25, 2020): 130–36. http://dx.doi.org/10.26832/24566632.2020.050207.
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The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during June to December 2014 with a view to finding out the effect of age of seedlings at staggered planting and nutrient management on growth of aromatic fine rice (cv. BRRI dhan38). The experiment comprised three ages of seedlings viz., 30, 45 and 60-day old and six treatment of nutrient managements viz. control (no manures and fertilizers), recommended dose of inorganic fertilizers, 50% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha-1, 75% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha-1, 50% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1 and 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. The effect of age of seedlings and nutrient management and their interaction were significant on crop growth characters of aromatic fine rice. The result revealed that the highest plant height, total tiller hill-1, total dry matter production hill-1 and CGR were found when 30-day old seedlings were transplanted. Among the nutrient managements the highest growth parameters was obtain in 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1 due to the continuous supply of nutrients by the combination of organic and inorganic fertilizer which led to better growth in plants. In 30-day old seedlings with 75% inorganic fertilizer + poultry manure @ 2.5 t ha-1 treatment performed best in case of all growth parameters, while the lowest one was observed in 60-day old seedlings with control. Therefore, 30-day old seedlings with 75% inorganic fertilizer + poultry manure @ 2.5 t ha-1 treatment might be a promising practice in aromatic fine rice cultivation in terms of growth performance.
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Liu, Zong, Julie Howe, Xiao Wang, Xiao Liang, and Troy Runge. "Use of Dry Dairy Manure Pellets as Nutrient Source for Tomato (Solanum lycopersicum var. cerasiforme) Growth in Soilless Media." Sustainability 11, no. 3 (February 4, 2019): 811. http://dx.doi.org/10.3390/su11030811.
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A sustainable dairy manure amendment for soilless crop growth systems was evaluated for its ability to provide nutrients and serve as a major component of the growing media. After manure liquid/solid separation, the solids stream containing organic N and P was pelletized and used as a nutrient source for cherry tomato (Solanum lycopersicum var. cerasiforme) culture in soilless media. The pellets are low in moisture, odor, and pathogens, and they can be hauled at lower cost over longer distances and more easily stored than raw or composted manure. Manure pellet additions to soilless media were evaluated at 0%, 2.5%, 5%, 10%, 15%, 20%, 25%, 30%, 40%, and 50% by volume. Manure pellets had a total N content of 3.7%. Fruit size, ripeness, and biomass, plant height, nutrients value in tissue/pellets/media, and time to complete growth cycle were analyzed. Overall, manure pellet treatments improved plant height and growth rate compared to the negative control, especially when pellets were 15% to 50% of the soilless media. This indicates that the nutrients in the manure were being mineralized, and plants were able to utilize the manure-based nutrients for growth. Leaf tissue nutrient analysis revealed that N, K, Zn, and Fe in leaf tissue were not at sufficiency levels at any level of manure pellet addition. Phosphorus and Cu reached sufficiency levels with 10% or greater manure pellet additions. Calcium, Mg, S, Mn, and B were sufficient in all plants, regardless of fertilizer or manure pellet treatment. Manure pellets demonstrate the potential to be used as a substrate and partial growth medium to reduce synthetic fertilizer use for more sustainable soilless container culture.
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Awal, Ripendra, Almoutaz El Hassan, Farhat Abbas, Ali Fares, Haimanote K. Bayabil, Ram L. Ray, and Selamawit Woldesenbet. "Patterns of Nutrient Dynamics within and below the Rootzone of Collard Greens Grown under Different Organic Amendment Types and Rates." Sustainability 13, no. 12 (June 17, 2021): 6857. http://dx.doi.org/10.3390/su13126857.
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The knowledge about nutrient dynamics in the soil is pivotal for sustainable agriculture. A comprehensive research trial can retort unanswered questions. Dynamics of nutrients sourced from organic amendment types (chicken manure, dairy manure, and MilorganiteTM) applied at different rates (0, 168, 336, 672 kg total N/ha) were monitored within and below the rootzone of collard greens cultivated on a sandy loam soil in Prairie View, TX, USA. Macro- and micronutrients (e.g., TN: total nitrogen, P: phosphorous, K: potassium, Na: sodium, Ca: calcium, Mg: magnesium, B: boron, Cu: copper, Fe: iron, and Zn: zinc) were analyzed from soil solution samples collected during six sampling periods from within and below the rootzone. As hypothesized, the organic amendment types and rates significantly (p < 0.05 and/or 0.01) affected nutrient dynamics within and below the crop rootzone. Chicken manure released significantly more TN, P, K, Na, Ca, Mg, B, Cu, and Fe than the other two amendments. The application of chicken manure and MilorganiteTM resulted in higher below-the-rootzone leachate concentration of TN, Na, Mg, and Ca than in the leachates of dairy manure. Dairy manure treatments had the lowest concentrations of TN, Ca, and Mg; whereas, MilorganiteTM had the lowest concentrations of P, K, Na, B, and Cu in the collected leachates. The higher level of P (i.e., 4% in MilorganiteTM as compared to 2 and 0.5% in chicken and dairy manures, respectively, might have reduced the formation of Vesicular-Arbuscular (VA) mycorrhizae—a fungus with the ability to dissolve the soil P, resulting in slow release of P from MilorganiteTM treatment than from the other two treatments. Patterns of nutrient dynamics varied with rain and irrigation events under the effects of the soil water and time lapse of the amendment applications’ rates and types. All the macronutrients were present within the rootzone and leached below the rootzone, except Na. The dynamic of nutrients was element-specific and was influenced by the amendments’ type and application rate.
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Yatoo, Ali Mohd, Sartaj Ahmad Bhat, Md Niamat Ali, Zahoor Ahmad Baba, and Zarka Zaheen. "Production of Nutrient-Enriched Vermicompost from Aquatic Macrophytes Supplemented with Kitchen Waste: Assessment of Nutrient Changes, Phytotoxicity, and Earthworm Biodynamics." Agronomy 12, no. 6 (May 29, 2022): 1303. http://dx.doi.org/10.3390/agronomy12061303.
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Vermicompost is an organic fertilizer rich in nutrients, beneficial microbes, and plant growth hormones that not only enhances the growth of crops but also contributes to the improvement in the physicochemical and biological properties of the soil. However, its lower nutrient content makes it less preferable among farmers and limits its applicability. Here, we investigate, for the first time, nutrient enrichment of vermicompost by supplementing the free-floating macrophyte biomass with cow manure and organic nutrient supplements (eggshell, bone meal, banana peel, and tea waste). Free-floating macrophytes are aquatic plants that are found suspended on the water surface, playing a significant role in the structural and functional aspects of aquatic ecosystems. However, uncontrolled proliferation of these macrophytes endangers these ecosystems, having both economic and ecological implications; therefore, they need to be managed. Results showed an enhanced total nitrogen (2.87%), total phosphorus (0.86%), total potassium (3.74%), and other nutrients in vermicompost amended with cow manure and nutrient supplements. Highest biomass gain (710–782 mg), growth rate (11.83–13.04 mg), and reproduction rate (3.34–3.75 cocoons per worm) was also observed, indicating that amending bulking agent and nutrient supplements not only enhance the nutrient content of the final product but also improve overall earthworm activity. The stability and maturity of vermicompost, as indicated by C/N (<20) and Germination Index (>80), indicates that vermicompost obtained is suitable for agricultural applications. The study concluded that amendment of cow manure and organic nutrient supplements results in producing mature and nutrient-enriched vermicompost suitable for sustainable agricultural production.
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Raza, Syed Turab, Bo Zhu, Jia Liang Tang, Zulfiqar Ali, Raheel Anjum, Hamidou Bah, Hassan Iqbal, Xiao Ren, and Rida Ahmad. "Nutrients Recovery during Vermicomposting of Cow Dung, Pig Manure, and Biochar for Agricultural Sustainability with Gases Emissions." Applied Sciences 10, no. 24 (December 15, 2020): 8956. http://dx.doi.org/10.3390/app10248956.
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An experimental vermicomposting system was established in purple soil present in Sichuan Basin, China. The purpose of vermicomposting (VC) was to recycle and manage organic waste materials; for instance, animal manure and crop residues are present in great quantity. A particular use of earthworms for VC is a valuable method for retrieving essential plant nutrients. Experimental vermicomposting followed by monitoring was conducted for two months in summer with an interval of fifteen days. Four treatments, COM (compost without earthworms), VCM (using cow manure), VPM (through pig manure), and VBC (using biochar), were applied with agricultural wastes such as rapeseed and wheat straw in combination with cow dung, pig manure, and biochar, respectively. One-way analysis of variance (ANOVA) was used to statistically analyze and interpret the nutrient change among different treatments. Post hoc analysis was done using Tukey’s test. The experimental vermicomposting results revealed that VCM gives increased plant nutrients with a minimum C: N ratio (from 22.13 to 14.38) and a maximum increase in nitrogen concentrations (1.77 to 29.15 g kg−1). A significant decrease in ammonia volatilization was observed in the order VCM > VBC > VPM when compared to COM. It was experimentally established that vermicomposting is the most suitable method for converting organic waste into nutrient-rich fertilizer with the least environmental pollution load.
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Ceylan, Şafak, Funda Yoldaş, and Nilgün Mordoğan. "Residual Effects of Organic Manure on Onion Varieties’ Mineral Content." Turkish Journal of Agriculture - Food Science and Technology 8, no. 11 (November 27, 2020): 2372–77. http://dx.doi.org/10.24925/turjaf.v8i11.2372-2377.3633.
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This study was conducted to determine the residual effects of chicken manure applications on nutrients in leaves and bulbs of second crop onion that grown after lettuce in greenhouse conditions. In the study, residual effects of chicken manure in 4 different doses (control, 20 t ha-1, 40 t ha-1, 60 t ha-1) and chemical fertilizers applied in the recommended amounts are investigated. Three onion varieties, called Burgaz, Snow white, Champion, were used. In the study, the lowest nutrient uptake was observed in control. However, the highest mineral content in leaves and bulbs were determined in the plots, that on average 40 t ha-1 chicken manure was applied to. In terms of leaf nutrient content, when the varieties were compared to each other, Ca, Mg, and Cu contents were found to be the highest in the Burgaz variety. Phosphorus, Zn, Mn contents were analyzed to be the highest in Snow white while N values determined maximum in Champion. The Champion variety contained higher nutrient values in bulbs.
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Sloan, John, Cynthia McKenney, James McAfee, and Wayne Mackay. "(301) Bioavailability of Dairy Manure Compost Nutrients to Urban Landscape Plants." HortScience 41, no. 4 (July 2006): 1023D—1023. http://dx.doi.org/10.21273/hortsci.41.4.1023d.
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Dairy manure compost (DMC) may be an effective soil amendment when establishing new urban landscapes. The objective of this study was to evaluate the bioavailability of DMC nutrients to typical urban landscape plants. In March 2003, DMC rates of 0, 9, 18, and 27 kg/m2 (0, 1.25, 2.5, 5 cm) were incorporated into the top 10 to 15 cm of Austin silty clay soil. Half of each 6 x 6-m plot was established with bermudagrass sod and the other half with six types of ornamental plants consisting of annual, perennial, and woody species. During the third 2005 growing season, plant tissue was harvested from selected landscape plants to measure biomass production and nutrient uptake. Plant growth and nutrient contents were compared to plant available soil nutrients that were measured during fall 2004 and 2005. Plant available P in the upper 7.5 cm of soil ranged from 89 to 170 mg/kg in September 2004 and from 31.3 to 105.5 mg/kg in August 2004. Potassium and trace elements (Fe, Cu, and Zn) were also increased in the upper 7.5 cm by DMC applications. Increased concentrations of plant available soil nutrients in DMC-amended plots were correlated to overall increases in plant growth and nutrient uptake. Bermuda grass exhibited increased growth and increased tissue concentrations of N, P, K, and Zn. Penta biomass and nutrient uptake were also increased by DMC applications. Lantana stem weights significantly increased with DMC application rate up to 18 kg/m2, but no additional increases were obtained with the 27 kg/m2 rate. Results of this study show that, after three growing seasons with no additional fertilization, a 1- to 2-cm application of dairy manure compost is sufficient to provide continued fertility to landscape plants.
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Sharara, Mahmoud, Richard K. Kolesch, Erin L. Cortus, Rebecca A. Larson, John J. Classen, and Kevin A. Janni. "Addressing Nutrient Imbalances in Animal Agriculture Systems." Journal of the ASABE 65, no. 2 (2022): 235–49. http://dx.doi.org/10.13031/ja.14661.
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HighlightsAnimal agriculture intensification has greatly affected nutrient cycling and circularity in food production systems.Various nutrient balance methods are developed to improve nutrient management at various spatial scales.Balance-derived thresholds for action are identified using real-life examples in dairy production.Outreach and knowledge exchange are critical for development, adoption, and improvement of nutrient balance methods.Abstract. Animal agriculture is a major consumer and generator of both macro- and micronutrients. Intensification and regional concentration of animal production, due to economic and logistical advantages, have altered nutrient fluxes in agriculture systems, causing increased stock of nutrients in soils and, consequently, their emission to air and transport to surface water and groundwater. Established nutrient and manure planning frameworks, while effective in addressing nutrient point sources and using manure to enhance fertility and soil quality, have not been wholly successful in addressing farm- and region-scale challenges with nutrient concentrations. This review article addresses nutrient management issues associated with modern animal agriculture by advancing the use of nutrient budgets and balances. This is accomplished by establishing core concepts for nutrient budgets and balances as they apply to animal agriculture. Relevant spatial scales for these budgets are reviewed, including field, whole-farm, and watershed scales, along with proposed methodologies and data sources for each. This study also identifies existing region- and commodity-specific metrics (when available) for use as thresholds for corrective action toward more balanced nutrient budgets. Finally, recommendations for the community of practitioners, researchers, and educators are provided to address nutrient imbalance in animal agriculture systems. At farm and region scale, nutrient balance investments will be needed to strengthen accounting methodologies, develop appropriate data sources for measurements, identify thresholds for action, and apply the methods in appropriate settings and decisions. Data availability and uncertainty are recognized as key limitations facing wider adoption of these concepts, particularly considering data ownership and privacy concerns. The lack of transparent datasets that capture current animal production practices and their impact on manure composition and nutrient cycling is a gap facing these methodologies. The lack of engagement by practitioners and producers in the development phase of such tools greatly affects their adoption and utility. The need for continued engagement in establishing accepted methodologies, training, data collection, and education are crucial to establish farm- and region-scale methods and measure their value to nutrient planning over time. Keywords: Farm scale, Livestock, Manure nutrients, Nutrient budget, Poultry, Regional scale.
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Ferreira, Lucas, Mairê Butzer Viñales, Lucas Lopes e. Silva, and Luciola Santos Lannes. "Effects of animal manure upon growth of Cerrado plants." Revista Ibero-Americana de Ciências Ambientais 11, no. 4 (April 27, 2020): 81–88. http://dx.doi.org/10.6008/cbpc2179-6858.2020.004.0007.
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Through excretion, animals return to the soil part of the nutrients they ingest. This input can be an alternative to artificial inorganic fertilization aiming at increasing soil nutrient concentrations in degraded areas that are prone to restoration. In nutrient-poor soils, the addition of animal manure can promote increases in soil fertility, but studies assessing its effects upon plant communities are meager. This study aims at checking whether the addition of manure originated from livestock promotes plant growth increase and enzyme activity in Cerrado native plants of different functional groups as a way to subsidize processes of environmental recuperation in degraded areas using organic fertilization of an easily available source, as animal manure. The experiment was conducted in a screenhouse through a completely randomized design with four manure and six species treatments with three replicates. Manure treatments used were control, cattle, sheep and goat manure. The plant species selected belonged to main Cerrado herbaceous functional groups – two naturalized grasses, two alien invasive grasses, a legume herb and a Malvaceae herb. Phosphorus and nitrogen concentrations, and N:P ratios varied according to the type of manure. Soil organic matter content, phosphorus and potassium concentrations increased upon manure addition. Different manure types promoted various effects in height, biomass and acid phosphatase activity amongst the plants. Goat and cattle manure positively influenced Urochloa decumbens, an exotic invasive grass living in the Cerrado, whereas sheep manure addition promoted increase of non-invasive grasses. These results show that animal manure can promote better nutrient conditions for plants living in degraded areas, but the selection of the manure type for application in restoration projects aiming at aiding plant growth in Cerrado degraded areas will depend on the purpose of the project because different dung types benefit different plant functional groups.
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Ghadimi, Mehdi, Alireza Sirousmehr, Mohammad Hossein Ansari, and Ahmad Ghanbari. "Organic soil amendments using vermicomposts under inoculation of N2-fixing bacteria for sustainable rice production." PeerJ 9 (September 2, 2021): e10833. http://dx.doi.org/10.7717/peerj.10833.
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Organic and biological fertilizers are considered as a very important source of plant nutrients. A field experiment was conducted during 2017−2018 in paddy soil to investigate the effect of vermicomposting of cattle manure mixture with Azolla and rice straw on soil microbial activity, nutrient uptake, and grain yield under inoculation of N2-fixing bacteria. Experimental factors consisted of organic amendments at six levels (vermicomposts prepared from manure (VM); manure + rice straw (VRM); manure + Azolla mixture (VAM); manure + rice straw + Azolla mixture (VRAM); raw manure without vermicomposting (M), and a control) and N2-fixing bacteria at three levels (Azotobacter chroococcum, Azospirillum brasilence, and non−inoculation). The results showed that, vermicompost treatments compared to control and raw manure significantly increased the number and biomass−C of soil microorganisms, urease activity, number of tillers hill−1, phosphorus (P) and potassium (K) uptake, and grain and protein yield. Inoculation of plants with N2-fixing bacteria, especially Azotobacter increased the efficiency of organic amendments, so that the maximum urease activity, soil microbial activity, P and N uptake, and grain yield (4,667 (2017) and 5,081 (2018) kg/h) were observed in vermicompost treatments containing Azolla (VAM and VRAM) under inoculation with Azotobacter. The results of the study suggested that, using an organic source along with inoculation with appropriate N2-fixing bacteria for vermicompost has a great effect on enzyme activity, soil biology, nutrient uptake and grain yield has a synergistic interaction on agronomic traits under flooded conditions. Therefore, this nutrient method can be used as one of the nutrient management strategies in the sustainable rice production.
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Karimi, Rezvan, Wole Akinremi, and Don Flaten. "Nitrogen and phosphorus uptake from solid and liquid pig manure in perennial and annual cropping systems." Canadian Journal of Plant Science 98, no. 3 (June 1, 2018): 771–81. http://dx.doi.org/10.1139/cjps-2017-0160.
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Applying pig manure in excess of crop demand can result in nutrient loss to water bodies. We studied the effect of liquid and solid pig manures and their N- and P-based application rates on yield and nutrient uptake in annual and perennial cropping systems for 3 yr. The experiment had a split-plot design with five nutrient management treatments including liquid-N (annual N-based liquid pig manure), liquid-P (P-based liquid pig manure once every 5 yr), solid-N (annual N-based solid pig manure), solid-P (P-based solid pig manure once every 5 yr), and control (no manure). The liquid-P treatment showed high apparent nitrogen and phosphorus recovery (ANR and APR, respectively) in each cropping system and yields similar to that of the liquid-N treatment. The solid-N treatment had the smallest ANR in the perennial cropping system (9%–27%) and also the smallest APR in both cropping systems (typically <4%) possibly due to N deficiency and high P application rate. The current formula for estimating organic N mineralization overestimated the available N, particularly for solid pig manure, reducing crop yield. Based on the ANR obtained in this study, a more appropriate coefficient is 10%–15% of the organic N from solid pig manure for no-till perennial cropping systems.
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Miller, J. J., B. W. Beasley, E. Bremer, C. F. Drury, F. J. Larney, X. Hao, and D. S. Chanasyk. "Short-term legacy effects of feedlot manure amendments on irrigated barley yield and soil macronutrient supply." Canadian Journal of Soil Science 99, no. 1 (March 1, 2019): 100–115. http://dx.doi.org/10.1139/cjss-2018-0064.
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Limited research exists on short-term legacy effects of land application of different feedlot manures on barley (Hordeum vulgare L.) yield and soil macronutrient (NO3-N, PO4-P, K, and SO4-S) supply. In a study conducted in southern Alberta, feedlot manures with straw (ST) or wood-chip (WD) bedding were either stockpiled or composted and applied annually to a clay loam soil at 13, 39, and 77 Mg ha−1dry wt. for 17 yr. Control treatments without any amendments or with inorganic fertilizer were included. In the second and third year (2016–2017) after discontinuing manure applications in 2014, barley silage yield and soil nutrient supply measured in situ with plant root simulator (PRS®) probes were determined. No significant (P > 0.05) treatment effects occurred on barley yield. Significant treatment effects occurred on soil nutrient supply, but these depended on date and interaction with other treatment factors. Manure rate generally increased soil nutrient supply. Soil NO3-N and PO4-P supply were 40%–59% lower for composted manure with ST than the other three manure type-bedding treatments, and they were 26%–53% greater for stockpiled than composted manure. This indicated variable manure type effects at different dates. At the two highest rates, soil K supply was 60%–106% greater for ST than WD bedding, and the reverse trend occurred where SO4-S supply was 40%–174% greater for WD than ST bedding. Overall, short-term legacy effects of feedlot manure type and bedding were more persistent on soil macronutrient supply than barley silage yield.
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Reza, Arif, Soomin Shim, Seungsoo Kim, Sungil Ahn, Seunggun Won, and Changsix Ra. "Rational budgeting approach as a nutrient management tool for mixed crop-swine farms in Korea." Asian-Australasian Journal of Animal Sciences 33, no. 9 (September 1, 2020): 1520–32. http://dx.doi.org/10.5713/ajas.19.0640.
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Objective: Due to rapid economic return, mixed crop-swine farming systems in Korea have become more intensive. Intensive farming practices often cause nutrient surpluses and lead to environmental pollution. Nutrient budgets can be used to evaluate the environmental impact and as a regulatory policy instrument for nutrient management. This study was conducted to select a nutrient budgeting approach applicable to the mixed crop-swine farms in Korea and suggest an effective manure treatment method to reduce on-farm nutrient production.Methods: In this study, we compared current and ideal gross nutrient balance (GNB) approaches of Organisation for Economic Co-operation and Development and soil system budget (SSB) approach with reference to on-farm manure treatment processes. Data obtained from farm census and published literature were used to develop the farm nutrient budgets.Results: The average nitrogen (N) and phosphorus (P) surpluses were approximately 11 times and over 7 times respectively higher in the GNB approaches than the SSB. After solid-liquid separation of manure, during liquid composting a change in aeration method from intermittent to continuous reduced the N and P loading about 50% and 47%, respectively. Although changing in solid composting method from turning only to turning+aeration improved the N removal efficiency by 30.5%, not much improvement in P removal efficiency was observed.Conclusion: Although the GNB approaches depict the impact of nutrients produced in the mixed crop-swine farms on the overall agricultural environment, the SSB approach shows the partitioning among different nutrient loss pathways and storage of nutrients within the soil system; thus, can help design sustainable nutrient management plans for the mixed cropswine farms. The study also suggests that continuous aeration for liquid composting and turning+aeration for solid composting can reduce nutrient loading to the soil.
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Ozores-Hampton, Monica. "Developing a Vegetable Fertility Program Using Organic Amendments and Inorganic Fertilizers." HortTechnology 22, no. 6 (December 2012): 743–50. http://dx.doi.org/10.21273/horttech.22.6.743.
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This review integrates information from common organic amendments used in conventional vegetable production, including 1) cover crops (legumes and nonlegumes), 2) compost generated from yard wastes, biosolids, municipal solid waste (MSW), animal manures, and other biodegradable waste by-products, and 3) raw animal manure (with and without bedding). Environmental monitoring has shown elevated nitrate concentration to be widespread in both surface and groundwater, often occurring in regions with concentrated horticultural production. Therefore, the objective of this review was to calculate the nutrient content from organic amendments, since these are not considered nutrient sources. Common organic amendments affect soil bulk density, water-holding capacity, soil structure, soil carbon content, macro- and micronutrients, pH, soluble salts, cation exchange capacity (CEC), and biological properties (microbial biomass). The first step in building a conventional tomato (Solanum lycopersicum) fertility program will be to take a soil sample and send it to a soil laboratory for a nutrient analysis. These results should be compared with the local crop recommendations. Second, select the organic amendments based on local cover crop suitability and availability of compost, raw animal manure, or both. Then, determine the nutrients available from cover crops and other applied organic amendments and use inorganic fertilizer sources to satisfy the crop nutrient requirements not supplied from these other sources.
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Chowdhury, Shabnur, and MK Rahman. "Influence of different organic manures on growth, yield and mineral nutrient accumulation in lettuce (Lactuca sativa L.)." Dhaka University Journal of Biological Sciences 30, no. 2 (July 9, 2021): 159–68. http://dx.doi.org/10.3329/dujbs.v30i2.54642.
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Effects of organic manures on growth and yield of lettuce (Lactuca sativa L.) and nutrient accumulation in its leaves was examined. The experiment was conducted in a completely randomized design (CRD) replicated thrice with ten treatments involving nine organic manures and a control treatment. Growth parameters viz. plant height, leaf number, leaf length, leaf area, leaf area index and fresh and dry weight of leaf, stem and root were assessed. The highest height (23.69 cm), longest leaf (32.18cm), leaf area (5883.43cm2), leaf area index (6.434), fresh weight (85.41 g) and dry weight (42.73 g) were found in Payel organic manure. The maximum leaf number (27) was recorded in Approshika organic manure. The maximum content of nitrogen (6.12%), phosphorus (1.83%), potassium (4.11%) and Sulphur (1.69%) were observed in Payel organic manure. The best growth performance and nutrient accumulation was observed in Payel organic manure.
Dhaka Univ. J. Biol. Sci. 30(2): 159-168, 2021 (July)
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Coelho, B. R. Ball, R. C. Roy, A. J. Bruin, A. More, and P. White. "Zonejection: Conservation Tillage Manure Nutrient Delivery System." Agronomy Journal 101, no. 1 (January 2009): 215–25. http://dx.doi.org/10.2134/agronj2008.0001x.
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W. J. Powers and H. H. Van Horn. "Nutritional Implications for Manure Nutrient Management Planning." Applied Engineering in Agriculture 17, no. 1 (2001): 27–39. http://dx.doi.org/10.13031/2013.1933.
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Singh, A., and J. R. Bicudo. "Dairy Manure Nutrient Analysis using Quick Tests." Environmental Technology 26, no. 5 (May 2005): 471–78. http://dx.doi.org/10.1080/09593332608618541.
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