Relevant bibliographies by topics / Agricultural management of nutrients

Academic literature on the topic 'Agricultural management of nutrients'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 May 2023

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Journal articles on the topic "Agricultural management of nutrients"

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Bhattacharyya, P. N., M. P. Goswami, and L. H. Bhattacharyya. "Perspective of beneficial microbes in agriculture under changing climatic scenario: a review." Journal of Phytology 8 (May 14, 2016): 26. http://dx.doi.org/10.19071/jp.2016.v8.3022.

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<p>Agriculture is a complex network of interactions of plants with microorganisms. There is a growing demand for ecologically compatible environment friendly technique in agriculture that might be able to provide adequate supply of nutrients for the increasing human populations through improvement of the quality and quantity of agricultural products. Under the changing climatic scenario of global fluxes of the key biogenic greenhouse gases (CO<sub>2</sub>, methane and nitrous oxide), and some other environmental problems, the application of beneficial microorganisms in agriculture would serve as an important alternative gateway to some of the traditional agricultural techniques. Microorganisms of agricultural importance represent key ecological strategy for integrated management practices like nutrient management, disease and pest management in order to reduce the use of chemicals in agriculture as well to improve cultivar performance. The present review is intended to focus on the emergence of agriculturally important microorganisms (AIMs) to develop an ideal agricultural system through efficient utilization of nutrients and recycling of energy and thereby to preserve the natural ecosystem resources under climate change. The progress to date in using the beneficial microflora in a variety of applications related to agriculture along with key mechanism of action is also discussed in this review.</p>
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Kumar, Hemendra, Puneet Srivastava, Jasmeet Lamba, Brenda V. Ortiz, Thomas R. Way, Laljeet Sangha, Bijoychandra S. Takhellambam, Guilherme Morata, and Roberto Molinari. "Within-Field Variability in Nutrients for Site-Specific Agricultural Management in Irrigated Cornfield." Journal of the ASABE 65, no. 4 (2022): 865–80. http://dx.doi.org/10.13031/ja.15042.

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HighlightsPhosphorus and nitrogen in soil and plants varied during the growing season across the cornfield.Spatial variability in nutrients caused spatial variability in plant growth and crop yield across the cornfield.Hydrological characteristics and soil hydraulic properties were responsible for spatial variability in nutrients.Need to consider spatial variability in nutrients in delineating management zones before adopting management practices.Abstract. The adoption of precision agricultural practices in Alabama has been increasing in recent years. Although challenging, understanding nutrient variability in agricultural fields is important for site-specific management. This study investigated phosphorus (P) and nitrogen (N) variability in an irrigated cornfield located in the Town Creek Watershed of Tennessee Valley Region of Alabama, USA during the 2019 growing season. Three different irrigation management zones (high yield-HY, moderate yield-MY, and low yield-LY) were delineated based on ten years of historical records of crop yield, soil texture, and measured topography using the Management Zone Analyst (MZA) software. The soil samples at 0 to 15 cm, 15 to 30 cm, and 30 to 60 cm depths were collected five different times during the 2019 growing season. Both manure and inorganic fertilizer were uniformly applied during the growing season. At all soil depths, HY and MY zones had higher soil nutrient concentrations than the field average nutrient concentration. However, the LY zone had below field average soil nutrient concentration in the entire soil profile. The plants (above-ground) in HY and MY zones had higher than average nutrient concentrations and the plants in the LY zone had lower than average nutrient concentrations throughout the cornfield. This site-specific nutrient variation in these zones was due to within-field terrain attributes, differences in soil properties, and surface runoff losses. A significant difference was recorded in the corn yield in the HY and LY zones of the field. Two extreme groups of nutrients were found in the cornfield similar to irrigation management zones (HY and LY). A zone with a higher yield also had higher soil and plant nutrients in the zone (HY), and a zone with a lower yield also had lower soil and plant nutrients in the zone (LY). Incorporating nutrient variability for site-specific management in management zone delineation can help with reducing nutrient application, nutrient loss, and improving yield. This study supports the adopting of precision agricultural management practices based on in-field nutrient variability. Keywords: Corn, Crop yield variability, Irrigation, Management zones, Nitrogen, Nutrient variability, Phosphorus, Site-specific management, Topographical wetness index (TWI).
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Kopke, Ulrich, Miriam Athmann, Eusun Han, and Timo Kautz. "Optimising Cropping Techniques for Nutrient and Environmental Management in Organic Agriculture." Sustainable Agriculture Research 4, no. 3 (June 18, 2015): 15. http://dx.doi.org/10.5539/sar.v4n3p15.

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<p>Depth and architecture of root systems play a prominent role in crop productivity under conditions of low water and nutrient availability. The subsoil contains high amounts of nutrients that may potentially serve for nutrient uptake by crops including finite resources such as phosphorus that have to be used in moderation to delay their exhaustion. Biopores are tubular shaped continuous soil pores formed by plant roots and earthworms. Taproot systems especially those of perennial legumes can make soil nutrients plant available from the solid phase and increase the density of vertical biopores in the subsoil thus making subsoil layers more accessible for succeeding crops. Density of larger sized biopores is further enhanced by increased abundance and activity of anecic earthworms resulting from soil rest and amount of provided feed. Nutrient rich drilospheres can provide a favorable environment for roots and nutrient uptake of subsequent crops. Future efficient nutrient management and crop rotation design in organic agriculture should entail these strategies of soil fertility building and biopore services in subsoil layers site specifically. Elements of these concepts are suggested to be used also in mainstream agriculture headlands, e.g. as ‘Ecological Focus Areas’, in order to improve soil structure as well as to establish a web of biodiversity while avoiding constraints for agricultural production.</p>
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Havlin, John, and Ron Heiniger. "Soil Fertility Management for Better Crop Production." Agronomy 10, no. 9 (September 8, 2020): 1349. http://dx.doi.org/10.3390/agronomy10091349.

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Increasing crop productivity per unit of land area to meet future food and fiber demand increases both soil nutrient removal and the importance of replenishing soil fertility through efficient nutrient management practices. Significant progress in enhancing nutrient-use efficiency in production agriculture requires improved estimates of plant-available nutrients in the root zone, enhanced crop response to applied nutrients, and reduced offsite nutrient transport. This special issue, Soil Fertility Management for Better Crop Production, presents 15 manuscripts that advance our knowledge of interrelated soil, plant, and management factors important to increasing the nutrient availability and crop recovery of applied nutrients.
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Dubey, Meenal, Kallely C. Shinogi, H. K. Awasthi, and M. A. Khan. "Comparing the Nutrient Management Pattern in Soybean and Rice based Cropping Systems by Soil Health Card holders and Non-holders." INDIAN JOURNAL OF EXTENSION EDUCATION 58, no. 3 (2022): 83–87. http://dx.doi.org/10.48165/ijee.2022.58318.

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The paper discusses about the importance of Soil Health Card (SHC) based nutrient management based on a study carried out during 2017-18 on 100 SHC beneficiary farmers and 50 SHC non-beneficiary farmers of Madhya Pradesh. Significant differences between the beneficiary and non-beneficiary farmers of soil health card in the nutrient use pattern in soybean and rice-based cropping systems were found. Majority of the SHC beneficiaries failed to adopt the fertilizer nutrients as per recommendation. Major reasons identified behind this negative trend were difficulty in understanding the SHC information without the help of an agricultural/ extension officer and lack of knowledge about the importance of SHC &benefits associated with adopting soil test based nutrient management. Further, the positive correlation of micro and secondary nutrients application with the yield and income from the adopters’ farm fields reaffirms the key role scientific nutrient management plays in improving agriculture based rural economies. More efforts from the promoting agencies required to convince farmers to adopt SHC based nutrient recommendation.
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Panta, Sangam, and Dipika Parajulee. "Integrated Nutrient Management (INM) in Soil and Sustainable Agriculture." International Journal of Applied Sciences and Biotechnology 9, no. 3 (September 29, 2021): 160–65. http://dx.doi.org/10.3126/ijasbt.v9i3.39275.

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The world vision of no hunger target, food security, and zero poverty followed by raising standards of living of rural people through agricultural transformation is the greatest challenges faced by the agricultural planners worldwide. Due to the alarming state of population growth and cultivable land scarcity, change in agronomic practices which could bring a significant effect on crop production and productivity is urgently needed. The concept of using different sources of plant nutrients combined to check nutrient depletion, maintain soil health, and crop productivity, called INM, has a bright solution in this area. Recently several researchers introduced that integrated use of inorganic fertilizers, organic fertilizers, green manure, and bio-fertilizers is becoming an effective practice not only for increasing crop production and productivity but also for the better crop and soil health. In addition, INM helps to increase the activity of soil microorganisms and improves the soil physical, chemical and biological properties. So, INM create an economic eco-friendly environment by reducing the dependence on inorganic chemical fertilizers and improving the soil fertility, optimizing crop yield, maximizing profitability and ultimately making the agriculture sustainable. Lastly, INM is one of the good agricultural practices which needs to be followed by every conscious individual in order to maintain soil health, nutrient balance and to make the agriculture and environment more sustainable. Int. J. Appl. Sci. Biotechnol. Vol 9(3): 160-165
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Grant, Cynthia, Noura Ziadi, Bernard Gagnon, Don Flaten, and Jeff Schoenau. "Integrating knowledge of nutrient forms and dynamics into improved nutrient management practices: Atribute to Régis Simard." Canadian Journal of Soil Science 89, no. 2 (May 1, 2009): 133–44. http://dx.doi.org/10.4141/cjss07095.

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Régis Simard and his colleagues developed a research program focussing on the agronomic and environmental impacts of nutrients in agricultural systems. The success of this program resulted from an integrated approach, linking assessment of nutrient availability to an understanding of nutrient dynamics in the soil, and applying this understanding to development of improved management practices for a variety of nutrient sources. Research into nutrient availability conducted by Régis and his co-workers led to improvements in quantification of nutrient supply, using traditional soil analysis with batch chemical extraction as well as ionic exchange membranes (IEMs) and electro-ultrafiltration (EUF). Ion exchange membranes are now used as a tool in routine soil fertility assessments and in agronomic and environmental research to study nutrient ion release rates. Additionally, intensive analytical techniques, such as sequential extraction and X-ray absorption near-edge structure (XANES) were developed and used to characterize the forms and relative availability of soil nutrients for plant uptake or environmental effects. Characterization of nutrient pools improved understanding of nutrient dynamics in the soil, allowing a more accurate assessment of the agronomic value and environmental risk of nutrients applied to agricultural systems. Building on this knowledge, Régis and his colleagues developed improved methods of utilizing manures, composts, paper mill sludge (PMS) and liming by-products, effectively diverting nutrients from the waste stream into a resource for crop production. This paper describes the contributions of Régis and his colleagues to the improvement of agronomically and environmentally sustainable nutrient management practices, based on an integrated research approach that provided a clear understanding nutrient availability and soil nutrient dynamics. Key words: Chemical extraction, integrated nutrient management, ion exchange membranes, paper mill sludge, soil phosphorus, soil potassium
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Goulding, Keith, Steve Jarvis, and Andy Whitmore. "Optimizing nutrient management for farm systems." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1491 (July 25, 2007): 667–80. http://dx.doi.org/10.1098/rstb.2007.2177.

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Increasing the inputs of nutrients has played a major role in increasing the supply of food to a continually growing world population. However, focusing attention on the most important nutrients, such as nitrogen (N), has in some cases led to nutrient imbalances, some excess applications especially of N, inefficient use and large losses to the environment with impacts on air and water quality, biodiversity and human health. In contrast, food exports from the developing to the developed world are depleting soils of nutrients in some countries. Better management of all essential nutrients is required that delivers sustainable agriculture and maintains the necessary increases in food production while minimizing waste, economic loss and environmental impacts. More extensive production systems typified by ‘organic farming’ may prove to be sustainable. However, for most of the developed world, and in the developing world where an ever-growing population demands more food, it will be essential to increase the efficiency of nutrient use in conventional systems. Nutrient management on farms is under the control of the land manger, the most effective of whom will already use various decision supports for calculating rates of application to achieve various production targets. Increasingly, land managers will need to conform to good practice to achieve production targets and to conform to environmental targets as well.
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Jonkman, Nicolette Tamara Regina Johanna Maria, Esmee Daniëlle Kooijman, Karsten Kalbitz, Nicky Rosa Maria Pouw, and Boris Jansen. "Women's agricultural practices and their effects on soil nutrient content in the Nyalenda urban gardens of Kisumu, Kenya." SOIL 5, no. 2 (October 15, 2019): 303–13. http://dx.doi.org/10.5194/soil-5-303-2019.

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Abstract. In Kisumu up to 60 % of the inhabitants practice some form of urban agriculture, with just under 50 % of the workers being female. On average, women spend more hours a day in the gardens than men. Therefore women's knowledge is pivotal for effective agricultural management. To enhance and better use women's knowledge, gender-related sociocultural obstacles linked to land ownership, investment, and farm inputs have to be taken into account. We aimed to determine how the agricultural knowledge and motivations of female farmers working in the Nyalenda urban gardens in Kisumu (Kenya) influence the soil nutrient status as reflected by the total soil C and N; available soil N and P; and exchangeable soil Na, K, Mg, and Ca. Two prevailing practices were compared to determine how the agricultural management practice influences soil nutrient content: (1) applying manure only and (2) applying manure while intercropping with cowpeas. Interviews and focus group discussions were held to explore the agricultural knowledge and motivations of the women working in Nyalenda. Soil analysis showed that the soil in Nyalenda was rich in nutrients overall but that the intercropped fields contained significantly lower total soil nutrients than fields where only manure was applied. While theoretically intercropping with a legume such as cowpeas should increase soil N content, due to socioeconomic factors, such as poverty, intercropping was applied in a way that did not increase soil nutrient contents; rather it diversified revenue. The knowledge of the female farmers was found to be limited to practical and sensory knowledge. This shows that when aiming to improve soil nutrient status and agricultural yields through agricultural training, socioeconomic conditions, cultural context, and gendered knowledge differentiation have to be acknowledged.
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Tripathi, Pramila, and A. K. Shukla. "Advancements in Soil Nutrient Sensing for Real Time Nutrient Management based Recommendation System." International Journal of Advances in Agricultural Science and Technology 7, no. 11 (November 30, 2020): 157–68. http://dx.doi.org/10.47856/ijaast.2020.v07i11.019.

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Rapid soil testing and site specific nutrient management are the keys to improve agricultural production sustainably to feed the growing global population, which is projected to cross 9 billion by the end of 2050. A number of soil nutrient sensors are being developed to meet the demand. This paper is focused on the various recent developments in the field of soil nutrient sensors and their sensitivity for particular nutrients. The incorporation of these sensors to develop agriculture decision support systems is also been discussed. It may be concluded that it is better to integrate a number of sensors (optical and electrochemical) to obtain real time data on nutrient level in soil for a particular cropping season to provide the farmers with a real time report and support. Technologies to convert the results into farmer friendly reports and databases to store the real-time data are also very much essential. The entire study is summarized to have an idea of the development in the field of soil nutrient sensors globally in order to gain insights for the sustainable agricultural production in developing countries, such as India, where cost and population are the governing factors.
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Dissertations / Theses on the topic "Agricultural management of nutrients"

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Malone, Sarah J. "Agricultural nonpoint source pollution management : water quality impacts of Balm Road Treatment Marsh, Hillsborough County, Florida." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003211.

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HERRERA, MORENO AXEL MAURICIO. "ENVIRONMENTAL ASSESSMENT OF UNDERCURRENT AGRICULTURAL TECHNOLOGIES TOWARDS CIRCULAR NUTRIENT MANAGEMENT." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/885232.

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Circular Economy consists of re-designing effective processes that allow the subsequent recovery of wastes for new production methods, avoiding using new resources. However, an emerging holistic approach requires evidence of its systemic capacities to transition from unsustainable linear practices that had led our planet to face significant environmental problems such as climate change and alteration of biochemical flows. This study aimed to assess technologies that have proven to close C, N, and P loops regarding their overall environmental impact from two study cases; a) Microalgae production by using nutrient and water recovered streams; and b) Integrated anaerobic digestion system with precision agriculture, and bioenergy production. Results showed that the re-use of end-products is critical for positive environmental impacts due to avoided emissions from production, transport, and use of mineral sources, satisfying the aim of supporting a closed-loop integrated system. Nutrient recovery practices reduced GHG emissions, protected and enhanced soil carbon stocks, improved ground- and surface-water quality.
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Gedikoglu, Haluk McCann Laura. "Adoption of nutrient management practices." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/6614.

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Title from PDF of title page (University of Missouri--Columbia, viewed on March 17, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Thesis advisor: Dr. Laura McCann. Vita. Includes bibliographical references.
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Liu, Yingmei. "Effective Modeling of Nutrient Losses and Nutrient Management Practices in an Agricultural and Urbanizing Watershed." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/40398.

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The Lake Manassas Watershed is a 189 km2 basin located in the Northern Virginia suburbs of Washington, DC. Lake Manassas is a major waterbody in the watershed and serves as a drinking water source for the City of Manassas. Lake Manassas is experiencing eutrophication due to nutrient loads associated with agricultural activities and urban development in its drainage areas. Two watershed model applications using HSPF, and one receiving water quality model application using CE-QUAL-W2, were linked to simulate Lake Manassas as well as its drainage areas: the Upper Broad Run (126.21 km2) and Middle Broad Run (62.79 km2) subbasins. The calibration of the linked model was for the years 2002-05, with a validation period of 2006-07. The aspects of effective modeling of nutrient losses and nutrient management practices in the Lake Manassas watershed were investigated. The study was mainly conducted in the Upper Broad Run subbasin, which was simulated with an HSPF model. For nutrient simulation, HSPF provides two algorithms: PQUAL (simple, empirically based) and AGCHEM (detailed, process-based). This study evaluated and compared the modeling capabilities and performance of PQUAL and AGCHEM, and investigated significant inputs and parameters for their application. Integral to the study was to develop, calibrate and validate HSPF/PQUAL and HSPF/AGCHEM models in the Upper Broad Run subbasin. â One-variable-at-a-timeâ sensitivity analysis was conducted on the calibrated Upper Broad Run HSPF/PQUAL and HSPF/AGCHEM models to identify significant inputs and parameters for nutrient load generation. The sensitivity analysis results confirmed the importance of accurate meteorological inputs and flow simulation for effective nutrient modeling. OP (orthophosphate phosphorus) and NH4-N (ammonium nitrogen) loads were sensitive to PQUAL parameters describing pollutant buildup and washoff at land surface. The significant PQUAL parameter for Ox-N (oxidized nitrogen) load was groundwater nitrate concentration. For the HSPF/AGCHEM model, fertilizer application rate and time were very important for nutrient load generation. NH4-N and OP loads were sensitive to the AGCHEM parameters describing pollutant adsorption and desorption in the soil. On the other hand, plant uptake of nitrogen played an important role for Ox-N load generation. A side by side comparison was conducted on the Upper Broad Run HSPF/PQUAL and HSPF/AGCHEM models. Both PQUAL and AGCHEM provided good-to-reasonable nutrient simulation. The comparison results showed that AGCHEM performed better than PQUAL for OP simulation, but PQUAL captured temporal variations in the NH4-N and Ox-N loads better than AGCHEM. Compared to PQUAL, AGCHEM is less user-friendly, requires a lot more model input parameters and takes much more time in model development and calibration. On the other hand, use of AGCHEM affords more model capabilities, such as tracking nutrient balances and evaluating alternative nutrient management practices. This study also demonstrated the application of HSPF/AGCHEM within a linked watershed-reservoir model system in the Lake Manassas watershed. By using the outputs generated by the HSPF/AGCHEM models in the Upper Broad Run and Middle Broad Run subbasins, the Lake Manassas CE-QUAL-W2 model adequately captured water budget, temporal and spatial distribution of water quality constituents associated with summer stratification in the lake. The linked model was used to evaluate water quality benefits of implementing nutrient management plan in the watershed. The results confirmed that without the nutrient management plan OP loads would be much higher, which would lead to OP enrichment and enhanced algae growth in Lake Manassas.
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Littlejohn, Alex. "Nutrient mitigation capacity of low-grade weirs in agricultural drainage ditches." Mississippi State University, 2013.

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Jakrawatana, Napat Civil &amp Environmental Engineering Faculty of Engineering UNSW. "An integrated decision support tool for more sustainable management of biomass resources in agricultural regions." Awarded By:University of New South Wales. Civil & Environmental Engineering, 2009. http://handle.unsw.edu.au/1959.4/44547.

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Agriculture currently faces a number of environmental sustainability issues. Three key issues that are the focus of this study are greenhouse gas emissions, depletion of mineral phosphorus resources and cadmium contamination in agricultural soil. Biomass can potentially be used as a renewable energy source and can also be returned to improve the nutrient and drainage structure of agricultural soils. Sustainable management of biomass and agriculture can have significant impacts on reducing greenhouse gas emissions from a region. Moreover, it reduces the demand for external energy supply, phosphorous (P) based fertilizer, and it??s associated Cadmium (Cd) impurity which can contaminate the soil, plant and food chains. These three issues have typically been considered separately, and managed by different agencies or organisations. The aim of this thesis is to develop an integrated decision support tool that can be used for evaluating alternative options for management and resource recovery from biomass for enhancing recovery of energy, returning carbon (C) and phosphorus (P) from biomass back to soil, reducing greenhouse gas emissions and also cadmium (Cd) contamination in an agricultural region. This research employed a combination of the tools of Material Flow Analysis (MFA), Geographic Information System (GIS) and Cost-Benefit Analysis (CBA). MFA is used as the primary tool for this research. GIS and CBA are combined with MFA in later stages of the overall procedure to develop an integrated decision support tool. This integrated tool has been applied to the Murrumbidgee Irrigation Area (MIA) in Australia. Tracking the flow of essential substances using MFA has identified current resource management efficiency and substances accumulation across the region. Integrating a spatial analysis tool (GIS) with MFA has provided a feedback driven monitoring tool for evaluating trends of spatial accumulation of substances on agricultural land. This enables the time remaining before acceptable limits are exceeded to be estimated on a spatial basis. Integrated MFA and CBA has been applied to evaluate the tradeoffs and potential synergies of alternative biomass management options. Overall the tool can assist in evaluating the effectiveness of alternative scenarios and visualise the results to stakeholders in a systematic way.
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Wamsley, Peter Randal. "Laboratory Analysis of Sustainable Nutrient Treatment Methods for Agricultural Runoff." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1334797563.

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Mason, Rachel. "Modeling Agricultural Outcomes in a Warmer, Wetter Vermont." ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1034.

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This thesis aimed to model agricultural outcomes that are important to Vermont dairy farms and their surrounding communities -- runoff, erosion, nitrogen and phosphorus losses, crop yields, and timeliness of farm operations -- under a set of possible future climates. The Agricultural Policy/Environmental eXtender (APEX) model was used for this work, and the models were calibrated using data from a project that measured most of these outcomes on a set of local farms. The model setup and calibration methodology is thoroughly documented and may be a useful starting point for others who are new to agricultural modeling. Applied to two farms growing continuous corn, the future climate simulations showed that increasing temperatures by 2 C, combined with raising total precipitation or changing the seasonality of precipitation, had little effect on any outcome. Intense rainfall has increased greatly in recent decades, so a combination of higher temperatures and more intense precipitation was also simulated. This led to more runoff, more soil loss, and more nutrient losses. While median values were only modestly increased, the 95%-ile and total losses over the simulation period increased by a larger amount (as much as 53%, depending on the site). Management practices that can reduce runoff and soil/nutrient loss exist, but their effectiveness when a higher fraction of losses occur in large events is not well known. Crop yields changed by <10% in all simulations, and in some cases increased slightly. Other studies have warned of decreases in yields because of high summer temperatures and droughts. The pilot simulations in this thesis probed only a limited range of climate parameter space, so running the models for a wider range of scenarios may illuminate the circumstances in which particularly harmful and beneficial outcomes occur. Finally, APEX can in principle calculate the delays to corn planting that are expected if climate change leads to wetter conditions in the spring. However, the models consistently predicted that only harvest operations will be delayed. The reasons for this are not well understood, and it may be a useful avenue for future work. The present work is limited in a number of ways. Chief among these are somewhat mediocre model performance, and the narrow range of farming systems and climate scenarios investigated. Statistics describing the performance of the calibrated models were poorer than anticipated, and satisfactory results could not be obtained for some nutrient loss pathways. Only two farms were modeled, in just four hypothetical future climates; results for other relevant farming systems and climates may be quite different. Nonetheless, it is hoped that this thesis serves as a useful illustration of the potential and limitations of utilizing the APEX model in this context, and that it lays the groundwork for a more extensive investigation of agricultural outcomes under climate change in Vermont.
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Pessarakli, Mohammed, David M. Kopec, and Jeff J. Gilbert. "Growth Responses of Bermudagrass to Different Levels of Nutrients in the Culture Medium." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/216540.

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Bermudagrass (Cynodon dactylon L.), cv. Arizona Common was studied in a greenhouse to evaluate its growth responses in terms of shoot and root lengths and shoot and root dry weights under different levels of nutrients. Plants were grown hydroponically under five levels of nutrients in the growth medium [Full Nutrients (FN), Half Nutrients (½N), Quarter Nutrients (1/4N), One Eighth Nutrients (1/8N), and One Sixteenth Nutrient (1/16N)], using Hoagland solution No. 1. Plant shoots (clippings) were harvested weekly, oven dried at 60 °C, and dry weights recorded. At each harvest, both shoot and root lengths were measured and recorded. At the last harvest, plant roots were also harvested, oven dried, and dry weights were determined and recorded. The results show that shoot length, shoot and root dry weights, shoot total-N contents and concentrations, and the % of canopy green cover significantly decreased at lower (1/8 & 1/16) nutrient levels. This reduction was more pronounced as growth period progressed. Root length was stimulated at lower (1/4, 1/8, and 1/16) nutrient levels of the culture solutions. The differences in shoot lengths and shoot and root dry weights were not significant among the Full, 1/2, and 1/4 nutrient levels of the culture solutions. The differences in shoot total-N content and concentrations were not significant among the Full, 1/2, and 1/4 nutrient levels. There was no difference in either shoot total-N contents or concentrations among the respective nutrient treatments at different harvests. The above results were observed for both cumulative as well as the weekly growth responses.
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Paull, Rachel May. "Evaluating the Role of Biotic and Abiotic Ecosystem Components on the Retention and Removal of Ditch Nutrients in Ditches of Different Construction." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1594220539737151.

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Books on the topic "Agricultural management of nutrients"

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Dunne, E. J., K. R. Reddy, and O. T. Carton, eds. Nutrient management in agricultural watersheds. The Netherlands: Wageningen Academic Publishers, 2005. http://dx.doi.org/10.3920/978-90-8686-558-1.

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Stratton, Dayle Ann. Protecting ground water: A strategy for managing agricultural pesticides and nutrients. Olympia, WA (P.O. Box 47600, Olympia 98504-7600): Dept. of Ecology, Water Quality Program, 1992.

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Nutrient Management in Agricultural Watersheds (2004 : Wexford, Ireland), ed. Nutrient management in agricultural watersheds: A wetlands solution. Wageningen: Wageningen Academic Publishers, 2005.

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Bacteria in agrobiology: Plant nutrient management. Heidelberg: Springer, 2011.

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Parris, Kevin. Measuring the environmental impacts of agriculture: The use and management of nutrients. York: International Fertiliser Society, 2000.

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1931-, Brown A. G., Nambiar E. K. S, Australian Centre for International Agricultural Research., Center for International Forestry Research., and Commonwealth Scientific and Industrial Research Organization (Australia), eds. Management of soil, nutrients and water in tropical plantation forests. Canberra, ACT: ACIAR, 1997.

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GIS applications in agriculture: Nutrient management for energy efficiency. Boca Raton, FL: CRC Press, 2011.

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Center, International Fertilizer Development, ed. Lectures presented at IFDC training program: Plant nutrient management for sustainable agriculture : Muscle Shoals, Alabama, U.S.A., September 14-25, 1992. Muscle Shoals, Ala: International Fertilizer Development Center, 1993.

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Office, Northern Ireland Audit. Reducing water pollution from agricultural sources: The Farm Nutrient Management Scheme. Belfast: Stationery Office, 2011.

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Nutrient management legislation in European countries. [Wageningen], Netherlands: Wageningen Pers, 2001.

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Book chapters on the topic "Agricultural management of nutrients"

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Ashby, J. A., T. Gracia, M. Del Pilar Guerrero, C. A. Quiros, J. I. Roa, and J. A. Beltran. "Organizing experimenting farmers for participation in agricultural research and technology development." In Resource Management in Rice Systems: Nutrients, 339–55. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-5078-1_23.

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Douthwaite, B. "Increasing the impact of public-sector agricultural engineering research, development, and transfer." In Resource Management in Rice Systems: Nutrients, 313–37. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-5078-1_22.

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Dimyati, A., and A. Suryana. "Assessment Institute for Agricultural Technology (AIAT) for evaluation and dissemination of crop production technologies in Indonesia." In Resource Management in Rice Systems: Nutrients, 231–42. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-5078-1_16.

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Kihara, Job, Mateete Bekunda, Vimbayi Chimonyo, Anthony Kimaro, Bekele Kotu, Stephen Lyimo, and Wezi Mhango. "Management of soil fertility through application of fertilizers." In Sustainable agricultural intensification: a handbook for practitioners in East and Southern Africa, 48–61. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781800621602.0004.

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Abstract This chapter presents technologies for replacing the nutrients lost from cropped fields with external fertilizer sources in a manner that minimizes the consequences of too little or too much application. The technology of using industrial fertilizers, organic fertilizers, and application of farmyard manure and compost alone or in combination with industrial fertilizers are discussed in detail.
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Bell, Michael J., Michael L. Thompson, and Philip W. Moody. "Using Soil Tests to Evaluate Plant Availability of Potassium in Soils." In Improving Potassium Recommendations for Agricultural Crops, 191–218. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_8.

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AbstractThe purpose of this chapter is to describe how bioavailable soil K is assessed or predicted by soil tests. Soil testing commonly refers to the collection of a sample of soil representative of a field or agronomic management unit and, by way of extraction using chemical reagents, determination of the quantity of a nutrient that can be related to plant uptake or yield. Normally only a small fraction of the total quantity of the nutrient present in the soil is extracted during the procedure, but if that amount can be correlated with actual crop uptake or overall crop productivity, then the soil test is deemed to have useful predictive power.Soil tests are routinely used to guide applications of fertilizer to soil so that crop demand for nutrients can be met effectively and economically. Here, we summarize the procedures involved in collecting a representative soil sample for K analysis, outline how that sample should be prepared for laboratory analysis, highlight the principles and mode of action of routine soil tests, and explore some common issues that may confound the correlation between a soil K test result and plant K acquisition or crop yield. Soil testing methods are discussed in the context of their relationship to the different forms of soil K and the in-soil chemical processes that may change these forms into K that can be taken up by roots.
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Van Keulen, H. "Sustainability and long-term dynamics of soil organic matter and nutrients under alternative management strategies." In Systems Approaches for Sustainable Agricultural Development, 353–75. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0121-9_18.

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Hossain, M., and MD S. Alam. "Grass roots organization for promoting sustainable agriculture and food security: the experience of Grameen Bank in Bangladesh." In Resource Management in Rice Systems: Nutrients, 297–311. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-5078-1_21.

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Mehta, C. M., Byiringiro Emmanuel, Amit Kesarwani, Kanak Sirari, and Anil K. Sharma. "Nutrient Management Strategies Based on Microbial Functions." In Microbial Inoculants in Sustainable Agricultural Productivity, 143–63. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2644-4_10.

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Reetz, Harold F., and Paul E. Fixen. "Economic Analysis of Site-Specific Nutrient Management Systems." In Site-Specific Management for Agricultural Systems, 743–52. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1995.site-specificmanagement.c55.

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Pierce, F. J., D. D. Warncke, and M. W. Everett. "Yield and Nutrient Variability in Glacial Soils of Michigan." In Site-Specific Management for Agricultural Systems, 133–51. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1995.site-specificmanagement.c10.

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Conference papers on the topic "Agricultural management of nutrients"

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Baker, James L., Stewart W. Melvin, Marius M. Agua, and John J. Rodecap. "Fate and Transport of Nutrients in an Iowa Agricultural Watershed." In Proceedings of the 10th Annual Integrated Crop Management Conference. Iowa State University, Digital Press, 2000. http://dx.doi.org/10.31274/icm-180809-692.

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Zengeya, Tsitsi, Paul Sambo, and Nyasha Mabika. "The Adoption of the Internet of Things for SMART Agriculture in Zimbabwe." In 2nd International Conference on Machine Learning, IOT and Blockchain (MLIOB 2021). Academy and Industry Research Collaboration Center (AIRCC), 2021. http://dx.doi.org/10.5121/csit.2021.111208.

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Zimbabwe has faced severe droughts, resulting in low agricultural outputs. This has threatened food and nutrition security in community sections, especially in areas with low annual rainfall. There is a growing need to maximize water usage, monitor the environment and nutrients, and temperatures by the adaptation of smart agriculture. This research explored the use of the Internet of Things (IoT) for smart agriculture in Zimbabwe to improve food production. The mixed methodology was used to gather data through interviews from 50 purposively sampled A2 farmers in the five agricultural regions of Zimbabwe and was supported by the use of the Internet. The findings reveal that some farmers have adopted IoT in Zimbabwe, others are still to adopt such technology and some are not aware of the technology. IoT’s benefits to Zimbabwean farmers are immense in that it improves food security, water preservation, and farm management. However, for most farmers to benefit from IoT, more awareness campaigns should be carried out and mobile and fixed Internet connectivity improved in some of the areas.
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Mogildea, Vladimir, Iurie Bejan, and Andrian Tugulea. "Rolul nutrienților în poluarea difuză a corpurilor de apă din bazinul hidrografic Răut." In Starea actuală a componentelor de mediu. Institute of Ecology and Geography, Republic of Moldova, 2019. http://dx.doi.org/10.53380/9789975315593.24.

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The amount of organic substance, nutrients (nitrogen and phosphorus) from diffuse sources in the Răut Hydrographic Basin was evaluated. It was found that out of total nitrogen, 66% is produced by livestock, 29% is formed in human agglomerations, and 5% is nitrogen from household waste. Phosphorus is produced by livestock -46%, by agglomerations of -49% and by 5% of household waste. The spatial distribution of nutrients on small river basins is relatively uniform. The major risk for water bodies in the BHR not to achieve a "good environmental status", under the Water Framework Directive, is current land use, in particular the weight and management of agricultural land.
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Pärn, J., and Ü. Mander. "Landscape factors of nutrient transport in temperate agricultural catchments." In RIVER BASIN MANAGEMENT 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/rm070391.

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Gall, H. E., and C. T. Jafvert. "Temporal Variations in Nutrient Fluxes in Agricultural Drains and Ditches." In Watershed Management Conference 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41143(394)83.

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Whitmore, Andrew, Kevin Coleman, A. Dailey, Margaret Glendining, and Keith Goulding. "Nutrient Management in Support of Environmental and Agricultural Sustainability." In The 1st World Sustainability Forum. Basel, Switzerland: MDPI, 2011. http://dx.doi.org/10.3390/wsf-00612.

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Kerry, R., B. Ingram, and M. Oliver. "78. Sampling needs to establish effective management zones for plant nutrients in precision agriculture." In 13th European Conference on Precision Agriculture. The Netherlands: Wageningen Academic Publishers, 2021. http://dx.doi.org/10.3920/978-90-8686-916-9_78.

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Matheyarasu, R., B. Seshadri, N. S. Bolan, and R. Naidu. "Nutrient management in effluents derived from agricultural industries: an Australian perspective." In SUSTAINABLE IRRIGATION 2012. Southampton, UK: WIT Press, 2012. http://dx.doi.org/10.2495/si120181.

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Omayra Ortiz - Santiago, Luis R Pérez - Alegría, and Fernando Pantoja - Agreda. "Anaerobic Digestion of Dairy Manure for Energy and Nutrients Recovery." In International Symposium on Air Quality and Manure Management for Agriculture Conference Proceedings, 13-16 September 2010, Dallas, Texas. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.32706.

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Liu, Mei, and Jun Lu. "Effect of anthropogenic activities on riverine nutrient concentrations in an agricultural watershed." In International Association of Management Science and Engineering Technology. Southampton, UK: WIT Press, 2012. http://dx.doi.org/10.2495/aie120651.

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Reports on the topic "Agricultural management of nutrients"

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Sengupta, Sukalyan, Beni Lew, and Lee Blaney. Closing the nutrient cycle through sustainable agricultural waste management. United States Department of Agriculture, January 2016. http://dx.doi.org/10.32747/2016.7600040.bard.

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Rakutko, S. A., E. N. Rakutko, and N. Yu Ivannikova. OPTIMIZATION AND MANAGEMENT OF ENERGY SAVING IN AGRICULTURAL ENERGY SYSTEMS. ЭЛЕКТРООБОРУДОВАНИЕ: ЭКСПЛУАТАЦИЯ И РЕМОНТ, 2018. http://dx.doi.org/10.18411/0131-5226-2018-11984.

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Adhikari, Roshan, Berber Kramer, Patrick S. Ward, Timothy Foster, Varun Sharma, Pushkar Gaur, and Subhransu Pattnaik. A gender-responsive approach to designing agricultural risk management bundles. Washington, DC: International Food Policy Research Institute, 2023. http://dx.doi.org/10.2499/p15738coll2.136692.

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Oke, A., K. Traore, A. D. Nati-Bama, H. Igbadun, B. Ahmed, F. Ahmed, and S. Zwart. Small-scale irrigation and water management technologies for African agricultural transformation. International Water Management Institute (IWMI), 2022. http://dx.doi.org/10.5337/2022.212.

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Fandohan, Alice Bonou, Markus Olapade, Leonard Wantchekon, Alessandra Garbero, Guy-Vanie Miakonkana, and Ndiack Fall. Introducing risk management tools to a large-scale agricultural development programme in Senegal. International Initiative for Impact Evaluation (3ie), July 2020. http://dx.doi.org/10.23846/tw13pe05.

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Kato, Edward, Dawit Kelemework Mekonnen, Solomon Tiruneh, and Claudia Ringler, eds. Sustainable land management, gender, and agricultural productivity: Evidence from Ethiopia's fragile watershed observatory. Washington, DC: International Food Policy Research Institute, 2021. http://dx.doi.org/10.2499/p15738coll2.134870.

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Hallberg, George R. A Progress review of Iowa's agricultural-energy-environmental initiatives : nitrogen management in Iowa. Iowa City, Iowa: Iowa Department of Natural Resources, Energy and Geological Resources Division, December 1991. http://dx.doi.org/10.17077/rep.006481.

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Tangermann, Stefan. Risk Management in Agriculture and the Future of the EU’s Common Agricultural Policy. Geneva, Switzerland: International Centre for Trade and Sustainable Development, 2011. http://dx.doi.org/10.7215/ag_ip_20110621a.

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Kato, Edward, Dawit Kelemework Mekonnen, and Claudia Ringler. Gender gaps in sustainable land management and implications for agricultural productivity: Evidence from Ethiopia. Washington, DC: International Food Policy Research Institute, 2022. http://dx.doi.org/10.2499/p15738coll2.136361.

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Dougherty, Brian, Carl Pederson, Matt Helmers, Michelle Soupir, Dan Andersen, Antonio Mallarino, and John Sawyer. Drainage Water Quality Impacts of Agricultural Management Practices: Effectof Manure Application Timing and Cover Crops. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/farmprogressreports-180814-1723.

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