Journal articles on the topic 'Chemical fertility'
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1
Kirkpatrick, Jay F., and John W. Turner,. "Chemical Fertility Control and Wildlife Management." BioScience 35, no. 8 (September 1985): 485–91. http://dx.doi.org/10.2307/1309816.
2
Moody, PW. "Chemical fertility of krasnozems - a review." Soil Research 32, no. 5 (1994): 1015. http://dx.doi.org/10.1071/sr9941015.
Abstract:
Krasnozems (Ferrosols) characteristically have high contents of citrate-dithionite extractable Fe and moderate to high contents of clay throughout the profile. They typically have low cation exchange capacity (2-20 cmolc kg-1), high P sorbing ability, and a significant anion exchange capacity at depth. The chemistry of krasnozems is dominated by the variable charge characteristics of the organic matter and the oxy-hydroxides of Fe and Al which occur in the predominantly kaolinitic clay fraction. The effects of surface charge characteristics, organic matter, and extractable iron and aluminium on the cation and anion exchange capacities, P sorbing abilities and pH buffer capacities of Australian krasnozems are reviewed. A selection of reports of nutrient deficiencies and toxicities in these soils is presented and briefly discussed. Published data on the chemical composition of the soil solutions of krasnozems are reviewed. Data from a suite of paired (undeveloped and developed) krasnozem profiles from eastern Australia indicate that exchangeable Ca and Mg, effective cation exchange capacity (ECEC), pH buffer capacity (pHBC) and total N decrease significantly (P < 0.05) in the A horizon following development, while exchangeable K, ECEC and pHBC decrease (P < 0-05) in the B horizon. The decreases in the A horizon are shown to be a direct consequence of the decline in organic matter which occurs following development. Because of the crucial role that organic matter plays in the chemical fertility of krasnozems, they are less likely to maintain their fertility under exploitative conditions than other productive clay soils such as Vertosols. It is concluded that the sustainable use of krasnozems will depend on maintenance or enhancement of organic matter levels, maintenance of surface and subsoil pH by regular application of amendments, minimization of erosion, and replacement of nutrients removed in harvested products.
3
Smith, Adrian A., Jocelyn G. Millar, and Andrew V. Suarez. "A social insect fertility signal is dependent on chemical context." Biology Letters 11, no. 1 (January 2015): 20140947. http://dx.doi.org/10.1098/rsbl.2014.0947.
Abstract:
Identifying group members and individuals' status within a group are fundamental tasks in animal societies. For ants, this information is coded in the cuticular hydrocarbon profile. We manipulated profiles of the ant Odontomachus brunneus to examine whether the releaser and primer effects of fertility signals are dependent on chemical context. Fertility status is signalled through increased abundance of ( Z )-9-nonacosene ( Z 9 : C 29 ). Across the ant's distribution, populations have distinct hydrocarbon profiles but the fertility signal is conserved. Foreign queens and fertility-signal-treated workers from the same population, sharing a similar chemical background, elicited releaser effects from workers, whereas queens and fertility-signal-treated workers from different populations did not. Z 9 : C 29 presented without chemical background did not elicit releaser effects. A primer-effect experiment found that Z 9 : C 29 , presented without a chemical background, did not inhibit worker reproduction. Our results demonstrate that a familiar chemical background is necessary for appropriate responses to fertility signals.
4
Singh, Dheerendra, Khumanthem Babina Devi, Ashoka P., Raj Bahadur, Neeraj Kumar, Okram Ricky Devi, and Yumkhaibam Sonia Shahni. "Green Manure: Aspects and its Role in Sustainable Agriculture." International Journal of Environment and Climate Change 13, no. 11 (October 4, 2023): 39–45. http://dx.doi.org/10.9734/ijecc/2023/v13i113142.
Abstract:
Continuous cropping and frequent soil cultivation contribute to the breakdown of soil aggregates and the removal of organic matter, which reduces soil fertility and production. Green manuring is a low-cost and efficient approach for reducing the expense of inorganic fertilizers and preserving soil fertility. Due to the mounting problems facing agriculture, including climate change, extreme weather events, soil deterioration, and land contamination as a result of the overuse of chemical fertilizers, many farmers are adding green manuring into their methods to prevent soil erosion, improve soil structure, control weed growth, and most importantly increase the soil's fertility. The use of green manure has drastically decreased, raising concerns about the sustainability of soil fertility. Field crops may experience a temporary setback following the integration of organic residues with a high C-N ratio. By enhancing the soil's structure, fertility, and nutrient content, green manuring functions as a restoration factory to maintain the soil's fertility for sustainable agriculture. Green manure is therefore essential for growers that seek to decrease the use of dangerous chemicals for soil fertilization. Many farmers must use green manure in their operations to avoid the usage of chemical fertilizers in agriculture.
5
Legout, A., Hansson K., G. Van der Heijden, Laclau J-P., Augusto L., and Ranger J. "Chemical fertility of forest soils: basic concepts." Revue Forestière Française, SP (2014): Fr.], ISSN 0035. http://dx.doi.org/10.4267/2042/56262.
6
Moody, PW. "Corrigenda - Chemical fertility of krasnozems - a review." Soil Research 32, no. 5 (1994): 1015. http://dx.doi.org/10.1071/sr9941015c.
Abstract:
Krasnozems (Ferrosols) characteristically have high contents of citrate-dithionite extractable Fe and moderate to high contents of clay throughout the profile. They typically have low cation exchange capacity (2-20 cmolc kg-1), high P sorbing ability, and a significant anion exchange capacity at depth. The chemistry of krasnozems is dominated by the variable charge characteristics of the organic matter and the oxy-hydroxides of Fe and Al which occur in the predominantly kaolinitic clay fraction. The effects of surface charge characteristics, organic matter, and extractable iron and aluminium on the cation and anion exchange capacities, P sorbing abilities and pH buffer capacities of Australian krasnozems are reviewed. A selection of reports of nutrient deficiencies and toxicities in these soils is presented and briefly discussed. Published data on the chemical composition of the soil solutions of krasnozems are reviewed. Data from a suite of paired (undeveloped and developed) krasnozem profiles from eastern Australia indicate that exchangeable Ca and Mg, effective cation exchange capacity (ECEC), pH buffer capacity (pHBC) and total N decrease significantly (P < 0.05) in the A horizon following development, while exchangeable K, ECEC and pHBC decrease (P < 0-05) in the B horizon. The decreases in the A horizon are shown to be a direct consequence of the decline in organic matter which occurs following development. Because of the crucial role that organic matter plays in the chemical fertility of krasnozems, they are less likely to maintain their fertility under exploitative conditions than other productive clay soils such as Vertosols. It is concluded that the sustainable use of krasnozems will depend on maintenance or enhancement of organic matter levels, maintenance of surface and subsoil pH by regular application of amendments, minimization of erosion, and replacement of nutrients removed in harvested products.
7
Massaad, Charbel, Frida Entezami, Liliane Massade, Mouhamed Benahmed, François Olivennes, Robert Barouki, and Samir Hamamah. "How can chemical compounds alter human fertility?" European Journal of Obstetrics & Gynecology and Reproductive Biology 100, no. 2 (January 2002): 127–37. http://dx.doi.org/10.1016/s0301-2115(01)00441-9.
8
Welsch, Frank. "How can chemical compounds alter human fertility?" European Journal of Obstetrics & Gynecology and Reproductive Biology 106, no. 1 (January 2003): 88–91. http://dx.doi.org/10.1016/s0301-2115(02)00274-9.
9
Visconti, Fernando, Enrique Peiró, Carlos Baixauli, and José Miguel de Paz. "Spontaneous Plants Improve the Inter-Row Soil Fertility in a Citrus Orchard but Nitrogen Lacks to Boost Organic Carbon." Environments 9, no. 12 (December 4, 2022): 151. http://dx.doi.org/10.3390/environments9120151.
Abstract:
The inter-row soils in conventionally run citrus orchards in Eastern Spain lose fertility, either physically, chemically, or biologically, as a consequence of machinery traffic and the use of herbicides. In order to regain inter-row soil fertility, two grass-cover management alternatives to the commonly used herbicide-kept bare management, namely, spontaneous plants and fescue, were established and left for four years until their effects on several physical, chemical, and biological parameters were monitored for two years more. The fescue ground cover exhibited lower average and maximum soil temperatures due to higher evapotranspiration rates but also higher annual soil water content on average and, additionally, higher rhizodeposition. Despite the fact that these new beneficial conditions helped enhance the soil’s biological fertility under fescue, the physical or chemical fertilities did not improve and neither did the organic carbon (SOC). The spontaneous plants also enhanced the biological fertility, but in this case, beneficial conditions were reflected by improvements in the chemical fertility, particularly the exchangeable potassium, and in the physical fertility by increasing the surface hydraulic conductivity and decreasing the bulk density. In the inter-rows of this citrus orchard, a seeded grass cover does not seem able to provide any soil fertility enhancement in comparison to a spontaneous one; rather the opposite. However, a lack of natural or man-driven nitrogen inputs poses a constraint to SOC gains. For this aim, the annual surface application of organic nitrogen-rich materials or even better, the fostering of N-fixing organisms would be recommended.
10
Nurdin, Nurdin. "Teknik Penentuan Status Kesuburan Tanah Eksisting pada Calon Lahan Sawah Bukaan Baru di Sebagian Daerah Irigasi Bulango Ulu Provinsi Gorontalo." Journal Of Agritech Science (JASc) 7, no. 01 (June 27, 2023): 10–21. http://dx.doi.org/10.30869/jasc.v7i01.1176.
Abstract:
In Gorontalo Province, the Bulango Ulu irrigation area (D.I.) has the ability to build new paddy fields, although this potential is unknown, as is the level of soil fertility. The purpose of this study is to identify the variety of soil chemical properties and the level of soil fertility in the area. Three steps make up the soil fertility status technique: collecting soil samples on-site using survey and land observation methods, analyzing soil samples in the lab while examining the variety of soil chemical properties, and calculating soil fertility status using the deskwork methods. With the use of ArcGIS version 10, the analysis's output a spatial map of the distribution of soil fertility status in D.I. Bulango Ulu in Gorontalo Province is provided. The findings indicated that D.I. Bulango Ulu, Gorontalo Province still has a poor diversity of soil chemical properties. The fertility of the local soil is likewise poor.
11
Ma, Guozhu, Shenghai Cheng, Wenli He, Yixuan Dong, Shaowu Qi, Naimei Tu, and Weixu Tao. "Effects of Organic and Inorganic Fertilizers on Soil Nutrient Conditions in Rice Fields with Varying Soil Fertility." Land 12, no. 5 (May 7, 2023): 1026. http://dx.doi.org/10.3390/land12051026.
Abstract:
The majority of crop-growing areas in China have low or medium fertility levels, which limits the yield of crops grown in those areas. Fertilizer application can improve soil quality, but the effects of such treatments vary depending on the base soil fertility. However, the specific differences associated with the application of different fertilizer types to soils of varying fertility levels have yet to be clearly delineated. Here, the influences of several fertilizer types on physical, chemical, and biological soil indicators were assessed in rice fields in the red soil area of Hunan Province with varying base fertility levels: Hehua (low fertility), Dahu (medium fertility), and Longfu (high fertility). Four treatments were applied to these fields: no fertilizer, standard fertilizer, 60% chemical fertilizer + 40% organic fertilizer, and 100% chemical fertilizer. Across the three sites and treatment groups, the largest increases in total nitrogen and phosphorus contents were in Hehua and Longfu, respectively. Soil organic matter content increased most significantly in Hehua. Application of any type of fertilizer increased the total and fast-acting nutrient content in the low-yielding fields, whereas organic fertilizers increased the nutrient content and soil biological indicators more than chemical fertilizer alone did; the effect of organic fertilizer application on the combined enzyme activity of the soil was also higher than that of chemical fertilizers alone. Overall, these experiments provide a theoretical basis and technical support for rational fertilizer application and improvement of Hunan’s red soil quality based on the natural soil fertility levels.
12
Spiers, James D., Fred T. Davies, Chuanjiu He, Terri W. Starman, Scott A. Finlayson, Scott A. Senseman, and Kevin M. Heinz. "Fertilization Affects Constitutive and Wound-Induced Chemical Defenses in Gerbera jamesonii." Journal of Environmental Horticulture 29, no. 4 (December 1, 2011): 180–84. http://dx.doi.org/10.24266/0738-2898-29.4.180.
Abstract:
Abstract The total phenolic content and jasmonic acid (JA) content of foliage from gerbera (Gerbera jamesonii ‘Festival Salmon’) subjected to low and high fertilization rates were measured to determine effects of fertilization on phytochemicals implicated in defense of insect pests. Gerbera seedlings were fertilized with low (only supplied with initial fertilizer charge present in professional growing media) or high (200 mg·liter−1 N; recommended rate) fertilization rates. Since JA is induced in response to wounding, treatments consisted of ± mechanical wounding with a hemostat to one physiologically mature leaf and the subsequent harvest of that leaf at specified time intervals (0, 0.5, 1, 3, and 10 h) for JA quantification. Total phenolic content was measured in mature and newly formed leaves. Plants receiving low fertility had reduced aboveground dry mass, were deficient in nitrogen and phosphorous, and had approximately a 9-fold higher concentration of total phenolics in mature leaf tissue compared to high fertility plants. Newly formed leaves had greater concentrations of phenolics than mature leaves in low fertility plants. In response to wounding, JA accumulation was more rapid and higher concentrations of JA were sustained longer in low fertility plants than in high fertility plants. These results show that altering fertilization does affect phytochemicals implicated in defense against insect pests, and these chemical defenses are increased in the foliage of low fertility gerberas.
13
Bonanomi, M., G. Lucente, and B. Silvestrini. "Male fertility: core chemical structure in pharmacological research." Contraception 65, no. 4 (April 2002): 317–20. http://dx.doi.org/10.1016/s0010-7824(02)00303-7.
14
Trigunasih, NM, and PPK Wiguna. "Identification of soil fertility status of subak rice fields based on soil chemical properties in Denpasar city, Bali, Indonesia." African Journal of Food, Agriculture, Nutrition and Development 22, no. 115 (December 12, 2022): 21807–24. http://dx.doi.org/10.18697/ajfand.115.20880.
Abstract:
Soil functions as a storehouse of nutrients that are needed by plants for growth and production. Decreased soil fertility will cause a decrease in productivity due to reduced nutrients in the soil. To determine the state of nutrients, it is necessary to evaluate the status of soil fertility. This study was carried out in the Subak rice fields in Denpasar City, Bali Province, Indonesia. Denpasar City, is the capital of Bali Province which continues to grow, relying on the rice production from its rice fields. The main objective of the study was to evaluate the fertility status of soils in Subak rice fields in Denpasar City based soil chemical properties and to map their fertility status using Geographic Information System (GIS). The approach for this study included surveying and soil sample analysis. The parameters observed were soil chemical properties including: CEC, Base Saturation, C-Organic, P2O5, K2O and pH. The study delineated three categories of soil fertility status, namely high, moderate and low. The total area with high soil fertility was 1312.76 ha (63.77 %), while for the medium and low, the respective total areas were 560.83 ha (27.24 %) and 184.89 ha (8.98 %). The Subak condition with low soil fertility has deficiency in soil organic Carbon (C) content and low total Phosphorus (P). Recommendations for managing low soil fertility status are addition of organic matter and P fertilizer of 100 kgha-1. The spatial distribution of soil fertility status in Denpasar City was mapped using GIS. The distribution of fertility status in these rice fields shows that the majority of the fields classified as high fertility are located in East and South Denpasar. The different fertilization regimes followed between the Subaks were the cause of the observed different soil nutrient statuses. Therefore, it is necessary to give the same treatment in order to maintain soil fertility. Soil fertility and maintenance of agricultural land productivity were factors that supported food security in Denpasar City. Key words: Subak, Rice fields, Soil Fertility, Chemical Properties, Geographic Information System
15
David Willy Saputra Manullang, Gusmini, and Dewi Rezki. "KARAKTERISTIK SIFAT KIMIA TANAH DAN KANDUNGAN MERKURI PADA LAHAN BEKAS TAMBANG EMAS DAN LAHAN PERKEBUNAN KELAPA SAWIT (Elaeis guineensis Jacq.)." Jurnal Riset Perkebunan 2, no. 1 (March 8, 2021): 1–11. http://dx.doi.org/10.25077/jrp.2.1.1-11.2021.
Abstract:
The present study was conducted in Tebing Tinggi Village, Pulau Punjung Sub-district, Dharmasraya District was motivated by a desire to exploit land resources, especially open access land that was formerly a gold mine by cultivating oil palm plants. The objectives of this study were to determine the characteristics of soil chemical properties, the soil fertility level, and the level of mercury (Hg) contamination in former gold mining land by compared with the soil chemical fertility of oil palm plantations. The research method was a survey by purposive sampling. The Soil sampling for analysis of soil chemical properties was carried out by drilling of 0-40 cm deep with 12 sample points divided into 4 locations, where 3 locations in the former gold mine area that were grouped into three segments, namely segments 1, 2 and 3 and one location was in oil palm land. The parameters of soil chemical properties observed were pH, Al-dd, C-organic, C / N Ratio, N, P, K and Hg (Mercury). The results of this research, shows that the characteristics of soil chemical properties in the former gold mining area have decreased the level of soil fertility, characterized by the very low pH value and C-organic content, so that the nutrients contained in the land are very limited when compared to the soil fertility in oil palm land. This is indicated by the fact that the oil palm land has a high C-organic content and a moderate level of N-total content. The utilization of the land resources of the former gold mine, it is necessary to do land improvementsin terms of soil physically, chemically and biologically.
16
Banggo, Abraham, Charly Mutiara, and Philipus Nerius Supardi. "IDENTIFIKASI TINGKAT KESUBURAN TANAH DAN SIFAT KIMIA TANAH PADA LAHAN PEMBUDIDAYAAN SAYUR-SAYURAN DI KELURAHAN REWARANGGA SELATAN." AGRICA 14, no. 2 (January 15, 2022): 128–36. http://dx.doi.org/10.37478/agr.v14i2.1531.
Abstract:
Excessive use of inorganic fertilizers and intensive tillage can cause changes in chemical properties and soil fertility. This study aims to determine the chemical properties of the soil and the level of soil fertility on land that cultivates vegetables. The research was conducted in Rewarangga Selatan Village, Ende Regency. This research was conducted using a survey method, by taking soil samples by composite methods on spinach, mustard and kale vegetables. The variables observed were soil pH, C-Organic, P2O5, K2O, CEC, and KB. These variables were analyzed for soil chemical properties and then matched using soil chemical criteria and soil fertility from the Bogor Soil Research Center. The results showed that the soil chemical criteria were soil pH in the acidic to very acidic category (4.0–5.0) , moderate C-Organic (2.03% – 2.37%), very high P2O5 (39.53 ppm – 48.90 ppm), very high K2O (1.01 me/100gr – 1.24 me/100gr), very high CEC (40.11 me/100gr – 40.33 me/100gr), and very high KB (82 ,11% - 86.76%) . While the criteria for soil fertility in the cultivation of vegetables are moderate.
17
Fei, Lu, Xin Chen, Mu Qiu Zhao, Ya Jie Zhao, Yi Shi, and Bin Huang. "Leaching of Total Phosphorus in Greenhouse Soil in Relation to Soil Fertility and Fertilizer Application." Advanced Materials Research 183-185 (January 2011): 1100–1104. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1100.
Abstract:
Inappropriate applications of phosphorus (P) in agricultural production lead to the leaching loss of P, which subsequently contributes to the eutrophication of water bodies. A leaching experiment using unsaturated intact soil columns was conducted to study the influence of fertilizer application on leaching of phosphorus in a gley meadow soil at different fertility levels (low-, medium and high fertility levels). The soil column at each fertility level received three fertilization treatments (control [CK], manure [M] and chemical fertilizer [F]). The results indicated that the leaching loss of total P (TP) from the soil column was induced by the P input from either manure or chemical fertilizer application, and the extent of leaching loss of P was also positively related to the soil fertility level. In addition, the TP concentrations in the leachates from all fertilization treatments exceeded the critical value for water eutrophication (0.02 mg P/L). This suggests that applications of manure and chemical fertilizer at proper rates with close consideration of the soil fertility level are essential to reduce the leaching loss of TP to the environment.
18
I., Lida, Omar A. O. Rekani, and Vahil I. H. Barwari. "Spatial variability of Soil fertility using soil chemical data, Atrush area, Duhok, Kurdistan region, Iraq." Journal of Zankoy Sulaimani - Part A 18, no. 3 (June 5, 2016): 113–22. http://dx.doi.org/10.17656/jzs.10540.
19
FS, Harahap, and Yana Rendi Fitra. "Characteristics of Chemical Properties of Oil Palm Soil at Plant Age in Different Areas of Land." Jurnal Pertanian Tropik 7, no. 2 (November 2, 2020): 233–38. http://dx.doi.org/10.32734/jpt.v7i2.4308.
Abstract:
This study aims to identify the fertility variable that is an obstacle in Bilah Hulu Subdistrict, Labuhanbatu Regency by evaluating the status of soil fertility and assessing alternative management in accordance with the status of soil fertility found in the Center of the People's Palm Oil Plantation, N Satu Aek Nabara Village, Bilah Hulu District, Labuhanbatu Regency with a height of ± 80 meters above sea level. This research is a phenomenological qualitative descriptive study with a land survey and is supported by qualitative laboratory analysis. Soil sampling is carried out in the survey area sequentially based on where the estimated nature of the soil is different from the purposive random sampling method, so the results of the soil analysis obtained are expected to reflect the true value. 60 cm and recording the coordinates using the Global Positioning System. Whereas soil management information is obtained by direct field observation and in-depth interviews with farmers in a snowball aiming to obtain complete information from farmers. Soil chemical properties analyzed in C-organic laboratory, CEC, Base Saturation. To determine the chemical properties of the soil with certain criteria that have been determined. Based on Technical Instructions for Evaluating Soil Fertility. Soil fertility parameters that become obstacles in the status of soil fertility in N Satu Aek Nabara Village, Bilah Hulu District, Labuhanbatu Regency are low soil organic matter content, and very low soil fertility. The direction of management of soil fertility for sloping land units in the lower, palm, and peak areas of palm oil is in the form of adding organic matter with compost and fertilizer and inorganic substances in accordance with recommendations to improve soil fertility status.
20
Zuraida, Putri Alfira, and Yulia Nuraini. "PENGARUH APLIKASI KOMPOS KOTORAN SAPI DAN PAITAN TERHADAP SIFAT KIMIA TANAH DAN PERTUMBUHAN TANAMAN KEDELAI." Jurnal Tanah dan Sumberdaya Lahan 8, no. 1 (December 31, 2020): 123–33. http://dx.doi.org/10.21776/ub.jtsl.2021.008.1.16.
Abstract:
Fertile agricultural land encourages people to carry out agricultural cultivation activities. But in general, it has decreased soil fertility because its managed intensively without recycling of organic matter and has an impact on decreasing soil fertility chemically such as soil organic carbon and pH then leads to low productivity. Soybean is an agricultural product that necessary to develop because the demand for soybean consumption in East Java Province has always increased. However, Indonesia has not been able to fulfil this demand. One of the technology innovations that can be applied to improve soil fertility that has low organic matter and to increasing soybean production by providing input of quality organic fertilizer in the form of compost (Tithonia and Cow Dung). So this research is important to determine the effect of application cow dung compost and tithonia on soil chemical properties, the growth of soybean crops, and the correlations between soil chemical properties and soybean growth. This study used a randomized block design with 6 treatments and 3 replications. The result showed that the application of tithonia and cow dung compost shows a significant effect on soil chemical properties, plant height, and the number of leaves, but didn’t show a significant effect on the number of branches in every observation. Based on the correlation analysis, the results show a positive correlation between soil chemical properties and soybean growth.
21
Meghana, B. Sai, G. P. Leelavathy, B. Vajantha, G. Prasad Rao, and M. V. S. Naidu. "Assessment of Soil Fertility Status of Rayal Cheruvu Village in Ramachandrapuram Mandal of Tirupati District, Andhra Pradesh, India." International Journal of Plant & Soil Science 36, no. 4 (March 6, 2024): 287–92. http://dx.doi.org/10.9734/ijpss/2024/v36i44481.
Abstract:
One hundred soil samples from Rayal Cheruvu village in Ramachandrapuram mandal of Tirupati district, Andhra Pradesh were collected by using GPS to study soil fertility status. These samples were analysed for physico-chemical and chemical parameters. The results revealed that soils were slightly acidic to strongly alkaline in reaction and non-saline. Soil organic carbon was low to medium. The available nitrogen was low, the available phosphorus ranged from low to high and the available potassium ranged from medium to high. The fertility status was used to assess soil fertility constraints in the study area.
22
Saikim, Saipul, Hertasning Yatim, and Hidayat AM Katili. "Identification and Assessment of Soil Physical and Chemical Properties for Vanili Plants in North Tinangkung District, Banggai Islands Regency." CELEBES Agricultural 1, no. 2 (February 24, 2021): 35–48. http://dx.doi.org/10.52045/jca.v1i2.24.
Abstract:
Soil physical and chemical properties are the main factors that significantlyinfluence vanilla production. This study aimed to identify the soil’s physicaland chemical properties, determine the soil fertility status, and evaluate the soilsuitability for vanilla plants cultivated at three villages in Tinangkung UtaraDistrict. This research has been carried out at the long-term monoculture of thevanilla plantation. The soil fertility properties have determined based onphysical properties such as texture (pipete method) and chemical propertiessuch as pH, organic C content (Walkey and Black), P2O5 (olsen) and K2O(HCL25%), base saturation/KB dan cation exchange capacity/CEC ) NH4OAcpH7). The data then matched to PPT soil fertility and BBSDLP land evaluationcriteria for the vanilla plant. The result showed that the soil in the study sitehas clayey texture, neutral soil reaction, moderate KB and P2O5, and moderateto high CEC. On the other hand, the soil exhibited lower content of organic Cand K2O. Despite soil fertility status determined as low, the evaluation analysisresulted marginally suitable, which could be optimised to highly suitable.
23
Engelsman, Michelle, Andrew P. W. Banks, Chang He, Sandra Nilsson, Debbie Blake, Ayomi Jayarthne, Zubaria Ishaq, Leisa-Maree L. Toms, and Xianyu Wang. "An Exploratory Analysis of Firefighter Reproduction through Survey Data and Biomonitoring." International Journal of Environmental Research and Public Health 20, no. 8 (April 11, 2023): 5472. http://dx.doi.org/10.3390/ijerph20085472.
Abstract:
Firefighters are occupationally exposed to chemicals that may affect fertility. To investigate this effect, firefighters were recruited to contribute blood, urine, breast milk or semen samples to (1) evaluate chemical concentrations and semen parameters against fertility standards and the general population; (2) assess correlations between chemical concentrations and demographics, fire exposure and reproductive history; and (3) consider how occupational exposures may affect reproduction. A total of 774 firefighters completed the online survey, and 97 firefighters produced 125 urine samples, 113 plasma samples, 46 breast milk samples and 23 semen samples. Blood, urine and breast milk samples were analysed for chemical concentrations (semivolatile organic compounds, volatile organic compounds, metals). Semen samples were analysed for quality (volume, count, motility, morphology). Firefighter semen parameters were below WHO reference values across multiple parameters. Self-reported rates of miscarriage were higher than the general population (22% vs. 12–15%) and in line with prior firefighter studies. Estimated daily intake for infants was above reference values for multiple chemicals in breast milk. More frequent fire incident exposure (more than once per fortnight), longer duration of employment (≥15 years) or not always using a breathing apparatus demonstrated significantly higher concentrations across a range of investigated chemicals. Findings of this study warrant further research surrounding the risk occupational exposure has on reproduction.
24
Santoso, Nono Agus, Raysha Kamal, Purwaditya Nugraha, and Happy Christin Natalia. "Geochemical study to determine what elements are most influential in soil fertility in the southern part of Lampung region." IOP Conference Series: Earth and Environmental Science 1307, no. 1 (February 1, 2024): 012022. http://dx.doi.org/10.1088/1755-1315/1307/1/012022.
Abstract:
Abstract Lampung is one of the best provinces in Indonesia in the agricultural sector. Research on agriculture in Lampung continues to develop over time. To expand land, research on agricultural land is needed. Agricultural soil contains chemical elements that support soil fertility. The aim of this research is to find out which chemical elements have the best correlation with soil fertility. The samples used were agricultural soil samples from the South Lampung and Pesawaran areas. The method used is a geochemical method with pH measurements and X-Ray Fluorescence testing. The results obtained were that the Mg element had a very strong correlation with soil fertility so that in the future the Mg element could be used as an indicator of soil fertility levels.
25
Nadeau, Martin B., and Thomas P. Sullivan. "Relationships between Plant Biodiversity and Soil Fertility in a Mature Tropical Forest, Costa Rica." International Journal of Forestry Research 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/732946.
Abstract:
We aimed to study relationships between plant biodiversity and soil chemical fertility in a mature tropical forest of Costa Rica. Soil samples were collected in nine sampling plots (5 m by 25 m) in order to identify P, K, Ca, Mg, Fe, Zn, Mn, Cu, and Al and total N contents, soil fertility index, CEC, pH, and C/N ratio. Furthermore, species richness, Shannon-Wiener and Simpson’s species diversities, structural richness, and structural diversity were calculated for each plot. Simple linear regression analyses were conducted. Tree species richness was inversely related to concentration levels of K, Ca, and P, CEC, and soil fertility index. Therefore, higher tree species richness tended to be found on sites with lower soil fertility, which is the complete opposite of temperate forests. As a result, tropical and temperate forest ecology should be considered separately. Shannon-Wiener tree species diversity was positively correlated to C/N ratio. Herb structural richness was positively correlated with soil fertility index and P concentration. Therefore, herb structural richness may be a good indicator of soil fertility. This study gives important insights on ecological relationships between plant biodiversity and soil chemical fertility in a primary tropical forest.
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Mpia, La, Hasbiadi Hasbiadi, Mustafa R, and Fitrianti Handayani. "INDENTIFIKASI KARATERISTIK KIMIA TANAH DAN EVALUASI STATUS KESUBURAN TANAH PADA LAHAN TANAMAN NANAS DI KELURAHAN WALAMBENO WITE KECAMATAN PARIGI KABUPATEN MUNA." AGROTEKSOS 33, no. 3 (December 31, 2023): 1113. http://dx.doi.org/10.29303/agroteksos.v33i3.1004.
Abstract:
Soil fertility provides an overview of the condition of the soil to provide nutrients. As land management is carried out intensively and over a long period of time, a decrease in soil fertility occurs. The research objectives to identify the chemical characteristics of the soil and evaluate the level of fertility of the soil planted with pineapple plants. This research was carried out in Walambeno Wite Village, Parigi District, Muna Regency, Southeast Sulawesi Province. Walambeno Wite Village is one of the central pineapple areas in Muna Regency. Soil samples were taken using the proportional sampling method on land planted with pineapple plants, at a processing layer depth of 0-30 cm. The soil chemical property parameters analyzed in the laboratory are KTK, pH H2O, C organic, N total, P available, K2O and wet saturation. Determination of soil fertility status is guided by the Soil Research Center. The research results show that the chemical characteristics of the soil in pineapple plantations are soil pH values with slightly acidic to neutral state, low to high C-organic, medium total nitrogen, very high P2O5, low to medium K2O, K2O medium to high KTK and high KB. The soil fertility status is low at location 2, medium at location 2, and high at location 3. The factors inhibiting soil fertility at the research site are low levels of C-organic and K2O.
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RAWLS, REBECCA. "New fertility-regulating hormone discovered." Chemical & Engineering News 64, no. 27 (July 7, 1986): 30. http://dx.doi.org/10.1021/cen-v064n027.p030.
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Nitin Soni, Rakesh Kumar, and Sandeep Kumar Anand Kumar Pandey. "Chemical Control of Fertility in Male Dogs: A Review." International Journal of Current Microbiology and Applied Sciences 7, no. 07 (July 10, 2018): 1760–73. http://dx.doi.org/10.20546/ijcmas.2018.707.209.
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Ukwu, Friday Kelvin. "Agro-Chemical Use in Crops in Ghana: Multidimensional Impacts and Sustainable Solutions." NEWPORT INTERNATIONAL JOURNAL OF RESEARCH IN MEDICAL SCIENCES 5, no. 2 (March 20, 2024): 4–6. http://dx.doi.org/10.59298/nijrms/2024/5.2.0461.
Abstract:
Agrochemical usage in Ghana's agriculture sector has become indispensable for enhancing crop yields and combating weed infestations. However, its extensive application raises concerns due to its adverse effects on soil fertility, human health, and biodiversity. This study examines the multifaceted impacts of agrochemicals in Ghana, emphasizing the need for sustainable agricultural practices to mitigate these challenges. Through an analysis of the effects on crop yield, soil fertility degradation, human health risks, and biodiversity loss, this research underscores the urgency of regulatory measures and the adoption of organic farming methods. The findings highlight the importance of balancing agricultural productivity with environmental and human health considerations to ensure long-term sustainability. Keywords: Agrochemicals, Crop Yield, Soil Fertility, Human Health, Biodiversity, Ghana, Sustainable Agriculture, Organic Farming
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Amu, Jen Achen, Herwin Yatim, Irsan Tatu, and Hidayat Arismunandar Katili. "Analysis of Soil Fertility in Oil Palm Plantation (Elaeis guineensis Jacq) Smallholder Farmers in East Luwuk District, Banggai Regency." CELEBES Agricultural 3, no. 1 (August 31, 2022): 72–81. http://dx.doi.org/10.52045/jca.v3i1.277.
Abstract:
One of the factors that influence the production of oil palm plantations is the condition of the land favorable for their growth and development, especially regarding the physical and chemical properties of the soil and the status of soil fertility. The purpose of this study was to determine soil’s physical and chemical properties, as well as its fertility status on smallholder oil palm plantations. Soil sampling was conducted through a descriptive exploratory survey method, involving six sampling points and representing three oil palm ages (11, 16, and 22 years old). The soil chemical and fertility status were analyzed using the National Criteria of Soil Chemical Properties developed by Soil Research Institute and Five Major Soil Chemical Properties approach developed by Soil Research Center. All observed soil exhibited clay textures and varying soil color matrix. The soil had neutral acidity, medium to high base saturation/BS and cation exchange capacity/CEC, moderate P2O5, as well as low organic C and K2O. Soil fertility status on the entire sites were classified as low, which primarily caused by low soil organic C and K contents. In order to improve soil condition favorably for oil palm growth and development, further studies must be conducted using more direct approach, relating the oil palm requirement with current state of soil and land conditions.
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Taghouti, Meriem, Javier García, Miguel A. Ibáñez, Raúl E. Macchiavelli, and Nuria Nicodemus. "Relationship between Body Chemical Composition and Reproductive Traits in Rabbit Does." Animals 11, no. 8 (August 4, 2021): 2299. http://dx.doi.org/10.3390/ani11082299.
Abstract:
The relationship among live weight, chemical body composition and energy content (at artificial insemination (AI) and three days before parturition), estimated by bioelectrical impedance with fertility rates and the percentage of kits born alive, was studied during the first three AI. The first AI was conducted at 16 weeks of age in 137 rabbit does that weighted 3.91 ± 0.46 kg. Their body chemical composition was 17.4 ± 0.50%, 16.1 ± 2.6%, 1067 ± 219 kJ/100 g body weight, for protein, fat and energy, respectively. An increase in body protein, fat and energy content at the first AI did not affect fertility at the first AI but improved it at the second AI (p ≤ 0.030). Moreover, an increase in body fat and energy content at the second AI improved fertility at the second AI (p ≤ 0.001). Fertility at the third AI was positively influenced by body protein at the third AI and the increase in body protein and fat between the second parturition and the third AI (p ≤ 0.030). The percentage of kits born alive at the first and at the second AI improved with the increase in body protein at the first AI (p ≤ 0.040). In conclusion, a minimal body protein and fat content is required at the first AI to optimize the reproductive performance in young does.
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Yogi, Rekha, O. P. Sharma, H. P. Verma, Krishna P. Kanwar, and A. C. Shivran. "Response of fertility and agro-chemical on growth and yield of different varieties of Clusterbean." International Journal of Agricultural Invention 5, no. 02 (June 15, 2019): 213–17. http://dx.doi.org/10.46492/ijai/2019.5.2.12.
Abstract:
A field experiment was conducted during kharif season of 2013 to study response of clusterbean varieties to fertility levels and agro-chemicals at SKN College of Agriculture, Jobner. The experiment consisted of two varieties (RGC-1038 and RGC-1066), three treatments of fertility levels (control, 50% RDF and 100% RDF) and three treatments of agro-chemicals (control, thiourea 500 ppm twice at vegetative and pre flowering stage and thiourea 100 ppm twice at vegetative and pre flowering stage) thereby making eighteen treatment combinations tested in randomized block design with three replications. The results indicated that RGC 1066 variety recorded significantly higher plant height 60 DAS and at harvest and dry matter per meter row length at 30 DAS, 60 DAS and at harvest, number of pods/plant and seeds/pod, test weight, seed yield, stover yield and biological yield as compared to variety of RGC-1038. The result further indicated that application of fertilized 100% RDF significantly gave higher plant height at 60 DAS and at harvest similarly, dry matter per meter row length at 30 DAS, 60 DAS and at harvest, number of pods/plant and seeds/pod, test weight, seed yield, stover yield and biological yield recorded higher over control and fertilized with 50% RDF. Likewise, application of agro-chemical @ thiourea (500 ppm) significantly increased the plant height at 60 DAS and at harvest and dry matter per meter row length at 30 DAS, 60 DAS and at harvest, number of pods/plant and seeds/pod, test weight, seed yield, stover yield and biological yield and remained at par with the application of agro-chemical @ TGA (100 ppm) over control. However, plant height at 30 DAS remained materially unchanged under different varieties, fertility levels and agro-chemicals.
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Fernandes, Josely Dantas, Lúcia Helena Garófalo Chaves, Jacqueline da Silva Mendes, Iêde de Brito Chaves, and Gilvanise Alves Tito. "Soil Chemical Amendments and the Macronutrients Mobility Evaluation in Oxisol Treated With Biochar." Journal of Agricultural Science 10, no. 10 (September 15, 2018): 238. http://dx.doi.org/10.5539/jas.v10n10p238.
Abstract:
Biochar is material produced during a process called pyrolysis. This material can be used as fertilizer to increase the agronomic productivity of low fertility soils. The objective of this study was to evaluate the soil chemical amendments and the macronutrients leaching following biochar application, produced from poultry litter, in Yellow Red Latosol in laboratory experiments. Soil columns (height 20 cm) containing 0; 10; 15; 20; 25 and 30 t ha-1 of biochar with four replications totaled 24 experimental units. For 30 days, water was applied daily to each column, and the leachates were collected and chemically characterized. After this period, soil samples were taken from the 0-10 and 10-20 cm layer depth and chemically characterized. Biochar reduced exchangeable acidity values. Biochar improved soil fertility. Leachates contained increasing EC, K, Na, Ca and Mg, however the concentration of these elements were small in relation to the biochar doses.
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Gunawan, Gunawan, Nurheni Wijayanto, and Sri Wilarso Budi. "Karakteristik Sifat Kimia Tanah dan Status Kesuburan Tanah pada Agroforestri Tanaman Sayuran Berbasis Eucalyptus Sp." Journal of Tropical Silviculture 10, no. 2 (December 16, 2019): 63–69. http://dx.doi.org/10.29244/j-siltrop.10.2.63-69.
Abstract:
Ministry of Environment and Forestry launched a flood prevention program in Garut regency with 3 rehabilitation programs namely conventional tree planting (Conventional Crops), Air Nurseries, and agroforestry forests. Choice of type is the key to success of agroforestry. The most widely planted species in the Cimanuk watershed are cultivars combined with vegetable crops. This study aims to analyze the soil chemical fertility status on eucalyptus-based vegetable agroforestry patterns in some age classes and to analyze changes in soil fertility status after harvest. The soil fertility status is chemically classified in all plots either monoculture or under eucalyptus age 2, 4, and 6 years.. Agroforestry planting patterns can improve the soil fertility status chemically into high categories. Prior to cultivation the mean value of CEC was 24.72 me / 100gr (moderate), Saturation Base 64.19% (high), P2O5 35.57 me / 100gr (very high), K2O 213.48 me / 100gr (very high), and C-org 3.54 % (high). After harvest the average value of CEC is 25.36 me/100g (high), Saturation Base 66.04 % (high), P2O5 77.05 me/100g (very high), K2O 652.83 me/100g (very high), and C-org 3.84 % (high).Key words: agroforestry, Cimanuk watershed, vegetable
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Pascal Lompo, Désiré Jean, Lambiénou Yé, Abdoudramane Balboné, and Siélé Ibrahima Sori. "Effets combinés du biocharbon et du fumier sur les propriétés physico-chimiques d’un sol ferrugineux tropical sous culture de mil en zone semi-aride du Burkina Faso." Journal of Applied Biosciences 157 (January 31, 2021): 16172–81. http://dx.doi.org/10.35759/jabs.157.3.
Abstract:
Objectifs : L’une des contraintes majeures des systèmes de production agricole au Burkina Faso demeure la dégradation des sols. La présente étude menée à Kongoussi (Burkina Faso) avait pour objectif de déterminer les effets du Biocharbon utilisé comme amendement sur le sol et les paramètres agronomiques du mil. Méthodologie et résultats : Un dispositif en blocs simple comportant 3 traitements en 5 répétitions a été utilisé. Les traitements comprenaient T0= Fumier + NPK, T1= Biocharbon + Fumier + NPK, T2= Biocharbon + NPK. Les matières fertilisantes ont induit une amélioration des paramètres chimiques du sol. Les meilleurs paramètres chimiques du sol ont été observés avec T1 (Biocharbon + Fumier + NPK) qui a permis l’obtention du plus grand rendement grains du mil comparativement à ceux obtenus avec les traitements T0 (Fumier + NPK) et T2 (Biocharbon + NPK) qui étaient statistiquement équivalents. Conclusions and application des résultats : La combinaison du biocharbon au fumier améliore la fertilité du sol et le rendement du mil. Cela constitue une solution intéressante en vue restaurer et ou maintenir la fertilité des sols, accroitre les rendements des cultures tout en réduisant les effets néfastes des changements climatiques à travers la séquestration du carbone dans le sol. La technologie du Biocharbon constitue une alternative intéressante pour la valorisation des résidus culturaux peu ou pas exploités pour améliorer durablement la qualité des sols et assurer la sécurité alimentaire tout en protégeant l’environnement. Mots-clés : fertilité des sols ; Biocharbon ; amendement organique ; séquestration du carbone, ABSTRACT Combined effects of biocharbon and manure on physico-chemical properties of a tropical ferruginous soil under millet cultivation in the semi-arid zone of Burkina Faso Objectives: One of the major constraints of agricultural production systems in Burkina Faso is the low soil fertility. The objective of this study conducted in Kongoussi (Burkina Faso) was to determine the effects of Biochar used as soil amendment in combination with manure on soil fertility and some agronomic parameters of millet. Methodology and results: A simple block disign with 3 treatments in 5 replicates was used. The randomly distributed treatments included T0= Manure + NPK, T1= Biochar + Manure + NPK, T2= Biochar + NPK. The Lompo et al., J. Appl. Biosci. 2021 Effets combinés du biocharbon et du fumier sur les propriétés physico-chimiques d’un sol ferrugineux tropical sous culture de mil en zone semi-aride du Burkina Faso. 16173 applied fertilizers improved some soil chemical parameters. The best soil chemical parameters were observed with T1 (Biochar + Manure + NPK), which induced the highest millet grain yield as compared to those obtained with T0 (Manure + NPK) and T2 (Biochar + NPK), which were statistically equivalent. Conclusions and application of findings : The combination of biochar with manure improves soil fertility and millet yield. This is an interesting solution to restore and/or maintain soil fertility, to increase crop yields while reducing the adverse effects of climate change through carbon sequestration into the soil. The Biochar technology is an interesting alternative for the valorization of crop residues little or not well exploited in order to sustainably improve soil quality and food security while protecting the environment. Keywords: Crop production ; Soil fertility ; Biochar ; organic amendment, carbon sequestration.
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Sumner, Rebecca Nicole, Imogen Thea Harris, Morne Van der Mescht, Andrew Byers, Gary Crane William England, and Richard Graham Lea. "The dog as a sentinel species for environmental effects on human fertility." Reproduction 159, no. 6 (May 2020): R265—R276. http://dx.doi.org/10.1530/rep-20-0042.
Abstract:
Despite the vast body of evidence that environmental toxicants adversely affect reproductive development and function across species, demonstrating true cause and effect in the human remains a challenge. Human meta-analytical data, showing a temporal decline in male sperm quality, are paralleled by a single laboratory study showing a similar 26-year decline in the dog, which shares the same environment. These data are indicative of a common cause. Environmental chemicals (ECs) detected in reproductive tissues and fluids induce similar, short term, adverse effects on human and dog sperm. Both pre- and post-natal stages of early life development are sensitive to chemical exposures and such changes could potentially cause long term effects in the adult. The environmental ‘pollutome’ (mixtures of ECs) is determined by industrialisation, atmospheric deposition and bioaccumulation and characterises real-life exposure. In Arctic ecosystems, dietary and non-dietary chemical contaminants are detectable in biological tissues and linked with adverse health effects in both dogs and their handlers. In the female, such exposure could contribute to disorders such as ovarian insufficiency, dysregulated follicle development, ovarian cancer, and polycystic ovarian syndrome. In the dog, ovarian chemical concentrations are greater in the testis. In addition, preliminary studies indicate that dietary exposures may influence the sex ratio in the offspring in favour of females. Within this article, we review current knowledge on chemical effects on human reproduction and suggest that the dog, as a sentinel species for such effects, is an essential tool for addressing critical data gaps in this field.
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Walida, Hilwa, Fitra Syawal Harahap, Zuriani Ritongah, Pitri Yani, and Rendi Fitra Yana. "EVALUASI STATUS HARA BAHAN ORGANIK TERHADAP SIFAT KIMIA TANAH DI LAHAN MIRING KELAPA SAWIT." ZIRAA'AH MAJALAH ILMIAH PERTANIAN 45, no. 3 (September 28, 2020): 234. http://dx.doi.org/10.31602/zmip.v45i3.3429.
Abstract:
This study aims to identify the fertility variable that is an obstacle in Bilah Hulu Subdistrict, Labuhanbatu Regency by evaluating the status of soil fertility and assessing alternative management in accordance with the status of soil fertility found in the Center of the People's Palm Oil Plantation, N Satu Aek Nabara Village, Bilah Hulu District, Labuhanbatu Regency with a height of ± 80 meters above sea level. This research is a phenomenological qualitative descriptive study with a land survey and is supported by a qualitative laboratory analysis. Soil sampling is carried out in the survey area sequentially based on where the estimated nature of the soil is different from the purposive random sampling method, so the results of the soil analysis obtained are expected to reflect the true value. 60 cm and recording the coordinates using global Positioning System. Whereas soil management information is obtained by direct field observation and in-depth interviews with farmers in a snow ball aiming to obtain complete information from farmers. Soil chemical properties analyzed in C-organic laboratory, CEC, Base Saturation. To determine the chemical properties of the soil with certain criteria that have been determined. Based on Technical Instructions for Evaluating Soil Fertility. Soil fertility parameters that become obstacles in the status of soil fertility in N Satu Aek Nabara Village, Bilah Hulu District, Labuhanbatu Regency are low soil organic matter content and very low soil fertility. The direction of management of soil fertility for sloping land units in the lower, palm, and peak areas of palm oil is in the form of adding organic matter with compost and fertilizer and inorganic substances in accordance with recommendations to improve soil fertility status.
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Ilboudo, Adama, Maurice Ouango Savadogo, Fidèle Kabore, Der Some, Joseph Nomwindé Kabore, Edmond Hien, and Salifou Traore. "Typologie et caractérisation morphopédologique des sols de bas-fonds soudano-sahéliens : cas du sous-bassin versant du Nakanbé-Dem au Centre-nord du Burkina Faso." International Journal of Biological and Chemical Sciences 17, no. 3 (August 24, 2023): 1269–87. http://dx.doi.org/10.4314/ijbcs.v17i3.39.
Abstract:
Dans la zone soudano-sahélienne Burkinabè, la population locale est plus dépendante des bas-fonds dont l’exploitation s’est accrue au cours de ces dernières décennies. Cette étude a pour objectif d’analyser les caractéristiques morphopédologiques des sols de bas-fonds du sous-bassin versant du Nakanbé-Dem situé dans la partie Sud du sahel. Des échantillons rocheux ont été prélevés et des analyses microscopiques en ont été effectuées. Des fosses pédologiques ont été ouvertes, des échantillons de sol de bas-fonds ont été effectués et analysés au laboratoire. Les données collectées ont été analysées à l'aide du logiciel R et statistiquement évaluées par des analyses de variances (ANOVA). Les résultats ont montré que le type morphologique de bas-fond est fonction du milieu géologique. La fertilité chimique du sol est plus élevée en milieu volcano-sédimentaire (0,82) qu’en milieu plutonique (0,78). Quatre classes de sols ont été recensées : les sols peu évolués, les sols ferrugineux tropicaux lessivés, les sols brunifiés et les sols hydromorphes. Leur répartition est en fonction des sous unités géomorphologiques des bas-fonds. Il existe une corrélation positive entre le degré de fertilité chimique du sol et les sous unités géomorphologiques des bas-fonds. Les sols de zones centrales sont de fertilité plus élevée que ceux des versants et des glacis. L’étude a souligné la fertilité faible à moyenne des sols de bas-fonds. Elle suggère la nécessité d’en tenir compte dans la valorisation agricole des bas-fonds soudano-sahéliens dans un contexte de pluviosité limitée
English title: Typology and morphopedological characterization of the soils of the Sudano-Sahelian lowlands: case of the Nakanbé-Dem sub-watershed in the Center-North of Burkina Faso
In the Sudano-Sahelian zone of Burkina Faso, local population is more dependent on lowlands. Lowlands exploitation has increased in recent decades. This study analyzes morphopedological characteristics of soils lowland of the Nakanbé-Dem sub-watershed, located in the sahel southern part. Rock samples were taken and microscopic analyzes were carried out. Soil pits were opened, bottomland soil samples were taken and analyzed in the laboratory. The data collected was analyzed using R software and statistically evaluated by analysis of variance (ANOVA). The results showed lowland morphological type is function of geological environment. Soil chemical fertility is higher in a volcano-sedimentary environment (0.82) than in plutonic environment (0.78). Four soils classes have been identified: poorly evolved soils, leached tropical ferruginous soils, brown soils and hydromorphic soils. Their distribution is based on the lowlands geomorphological subunits. There is positive correlation between degree of soil chemical fertility and lowlands geomorphological subunits. Central zone soils are higher fertility than those of the slopes and glacis. The study highlighted low fertility soils lowland. It suggests the need to take this into account in the agricultural development of Sudano-Sahelian lowlands in context of limited rainfall.
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Tiwari, K. K. "Assessment of Soil Fertility and Soil Nutrients of Three Land Use Systems in Jotsoma, Sechu and Rihuba Villages, Nagaland." Science & Technology Journal 9, no. 2 (July 1, 2021): 33–39. http://dx.doi.org/10.22232/stj.2021.09.02.03.
Abstract:
Soil testing is a key element in assessing the fertility status of soil and hence can be effectively used for assessing plant nutrient requirements and probability of crop production and use of fertilizers. Soils differ in their ability to supply nutrients to plants. The total amount of nutrients in the soil and the amount of their available forms as well as rate of nutrient transformation from unavailable forms to available form and vice versa are the major factors determining fertility status of the soils. To determine the fertility of the soils collected from three villages of Kohima and Phek Districts, both laboratory methods as well as testing kits were used. Various parameters like Nitrogen, Organic carbon, Phosphorus, Potassium along with electric conductivity and pH values is used to investigate the fertility status of soil. Study suggests that both Nitrogen and Phosphorus concentrations range between low to medium whereas organic content is high. Study further suggests that the studied soils are low in their pH. Electrical conductance value is low hence salinity effect is negligible. Potassium content is in medium range. A low to medium NI fertility status have also been interpreted on the basis of N, P and K. Present study also recommends the enhancement of the elemental concentrations through artificial means in the soils of the study area to increase the fertility.
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Juraev, Shomansur Sh. "GROWTH AND DEVELOPMENT OF AGRICULTURAL PLANTS OF ELECTROIMPULSE TILLAGE." American Journal of Agriculture and Biomedical Engineering 04, no. 11 (November 1, 2022): 1–5. http://dx.doi.org/10.37547/tajabe/volume04issue11-01.
Abstract:
This article discusses the effect of electroimpulse tillage on the growth and development of agricultural plants. Soil fertility refers to its ability to provide plants with water and nutrients. Soil fertility improves when the land is treated wisely, and on the contrary, it decreases when it is improperly cultivated. Soil fertility is divided into natural and artificial types. Natural fertility occurs under the influence of natural factors. Gray lands that have not yet been touched by human hands have natural fertility. Such productivity can be high or low depending on the natural conditions and factors in the process of soil formation, as well as the organic and mineral composition, chemical and biological properties of the soil.
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Huang, Juan, Daihua Jiang, Yusong Deng, Shuwen Ding, Chongfa Cai, and Zhigang Huang. "Soil Physicochemical Properties and Fertility Evolution of Permanent Gully during Ecological Restoration in Granite Hilly Region of South China." Forests 12, no. 4 (April 20, 2021): 510. http://dx.doi.org/10.3390/f12040510.
Abstract:
Permanent gullies are a serious type of soil erosion. A special type of permanent gully, called “Benggang” severly affects agricultural production in hilly areas. To reveal the influence of Benggang erosion on granitic soil restoration and fertility, we selected three stages (active, semi-stable and stable) of Benggang recovery in the subtropical granite hilly region, and corresponding soil samples were collected to analyze the spatial variation in the soil physical and chemical qualities in the early stage of recovery. The soil physical properties and nutrients were significantly different in the runoff direction of each Benggang gully. There were significant differences in soil chemical properties and no obvious differences in physical properties among the different Benggang recovery stages. The results of principal component analysis showed that the level of soil fertility in the different Benggang recovery stages, ranked from high to low, was as follows: stable, semi-stable and active. Benggang vegetation restoration was an important factor for soil fertility restoration. Benggang ecological restoration can significantly improve the physicochemical properties and fertility of the soil. However, the soil fertility in gully erosion areas in this study still needs to be improved.
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Oi, Cintia Akemi, Helena Mendes Ferreira, Rafael Carvalho da Silva, Andreas Bienstman, Fabio Santos do Nascimento, and Tom Wenseleers. "Effects of juvenile hormone in fertility and fertility-signaling in workers of the common wasp Vespula vulgaris." PLOS ONE 16, no. 5 (May 17, 2021): e0250720. http://dx.doi.org/10.1371/journal.pone.0250720.
Abstract:
In the highly eusocial wasp, Vespula vulgaris, queens produce honest signals to alert their subordinate workers of their fertility status, and therefore they are reproductively suppressed and help in the colony. The honesty of the queen signals is likely maintained due to hormonal regulation, which affects fertility and fertility cue expression. Here, we tested if hormonal pleiotropy could support the hypothesis that juvenile hormone controls fertility and fertility signaling in workers. In addition, we aimed to check oocyte size as a proxy of fertility. To do that, we treated V. vulgaris workers with synthetic versions of juvenile hormone (JH) analogue and a JH inhibitor, methoprene and precocene, respectively. We dissected the treated females to check ovary activation and analyzed their chemical profile. Our results showed that juvenile hormone has an influence on the abundance of fertility linked compounds produced by workers, and it also showed to increase oocyte size in workers. Our results corroborate the hypothesis that juvenile hormone controls fertility and fertility signaling in workers, whereby workers are unable to reproduce without alerting other colony members of their fertility. This provides supports the hypothesis that hormonal pleiotropy contributes to keeping the queen fertility signals honest.
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VIEIRA BARBOSA NETO, MANUELLA, MARIA do SOCORRO BEZERRA DE ARAÚJO, JOSÉ COELHO DE ARAÚJO FILHO, CRISTIANE BARBOSA DA SILVA, and EVERARDO VALADARES DE SÁ BARRETTO SAMPAIO. "Functional analysis of soil chemical attributes using Geographic Information Systems to assess nutrient deficiencies." Revista Brasileira de Geografia Física 15, no. 6 (March 30, 2023): 3264–76. http://dx.doi.org/10.26848/rbgf.v15.6.p3264-3276.
Abstract:
Information on soil fertility is essential to determine the need for correcting measures. However, the use of appropriate techniques to provide information on the specific potential of each soil in many agricultural areas is scarce. Soil fertility in an area with family farming was evaluated based on spatialization of soil chemical attributes to indicate their usage limitations. The study area was on the water basin of the Natuba River, in the Mata Centro Zone, Pernambuco state, Brazil. Samples were taken from soils under the most representative agricultural uses and under native vegetation following a slope gradient (top, middle and bottom). Samples were analyzed for their base saturation, cation exchange capacity, aluminum saturation and phosphorus concentration. These parameters were used to indicate their degree of limitation to agricultural use in order to create a georeferenced database and were mapped using a Geographic Information System (GIS). The cultivated Rhodic Acrisol and Eutric Gleisol had the highest fertility, while the Xanthic Acrisol, Chromic Acrisol and Xanthic Ferralsol had the highest usage limitations. Areas used to grow vegetables had higher nutrient availability than those cropped to sugarcane. Spatialization in the GIS system contributed to the overall fertility analysis, allowing a clear visualization of areas that need soil improvement.
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Nascente, Adriano Stephan, Luis Fernando Stone, and Carlos Alexandre Costa Crusciol. "Soil chemical properties affected by cover crops under no-tillage system." Revista Ceres 62, no. 4 (August 2015): 401–9. http://dx.doi.org/10.1590/0034-737x201562040010.
Abstract:
The use of cover crops in no-tillage systems (NTS) can significantly improve the soil's fertility. Thus, a study was performed to evaluate changes in chemical properties of soil caused by cover crops in a no-tillage system. The field experiment consisted of the following crop rotation: cover crops/rice/cover crops/rice. The experimental design was in randomized blocks with three replications. Treatments consisted of four cover crops (Brachiaria brizantha(Hochst. ex A. Rich.) Stapf. cv. Marandu, Brachiaria ruziziensis R. Germ. and C.M. Evrard, Panicum maximum Jacq. cv. Colonião, and Pennisetum glaucum(L.) R. Br. cv. BN-2) and fallow (control treatment). Soil samples were collected at the beginning of the summer crop in Oct 2007, Oct 2008 and Oct 2009 at 0-5 cm soil depth. The use of cover crops provided for a significant increase in the level of nutrients, soil organic matter, cation exchange capacity, and base saturation in the soil. Soil fertility improved from the first to second year with the growing of cover crops. The soil under cover crops P. glaucum, B. ruziziensis, and B. brizantha showed higher fertility than the area under fallow.
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Moody, PW. "Correction." Soil Research 32, no. 6 (1994): 1401. http://dx.doi.org/10.1071/sr9941401.
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Liu, Bo, Bo Yang, Chunxue Zhang, Xiaocheng Wei, Haoyu Cao, and Xiangqun Zheng. "Human Waste Substitute Strategies Enhanced Crop Yield, Crop Quality, and Soil Fertility in Vegetable Cultivation Soils in North China." Agronomy 11, no. 11 (November 4, 2021): 2232. http://dx.doi.org/10.3390/agronomy11112232.
Abstract:
Replacing chemical fertilizers with human waste for vegetable planting is a traditional, economical, and environmentally friendly waste resource utilization strategy. However, whether the human waste substitute strategy can improve soil fertility and increase crop yield and quality compared to the simple application of chemical fertilizers is still unclear, especially under acidic and alkaline soil conditions. In this study, we studied the effects of different ratios of human waste (urine and feces) to chemical fertilizer on the crop yield, crop quality, soil fertility, and soil chemical parameters in alkaline Cambisols and acidic Alisols cultivated with water spinach (Ipomoea aquatica Forssk.). The application variants of human waste and chemical fertilizer were as follows: (i) Control, no fertilization (CK), (ii) human waste application (HW), (iii) chemical fertilizer application (CF), (iv) 1/3 human waste to chemical fertilizer (P1), and (v) 2/3 human waste to chemical fertilizer (P2). Human waste application increased the total nitrogen, available phosphorus, available potassium, organic matter, NO3−-N, and conductivity in soil, enhanced soil enzyme activity, slowed down soil acidification, and increased the yield, soluble sugar, and vitamin C contents of the water spinach while reducing its nitrate content. Our findings indicate that human waste substitution improved soil fertility while reducing the potential risks of soil acidification, salinization, and human exposure to nitrates. These findings may be applied to increase vegetable production and quality, improve the soil environment, and increase the utilization of human waste as a valuable resource.
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Trigunasih, Ni Made, I. Wayan Narka, and Moh Saifulloh. "Measurement of Soil Chemical Properties for Mapping Soil Fertility Status." International Journal of Design & Nature and Ecodynamics 18, no. 6 (December 26, 2023): 1381–90. http://dx.doi.org/10.18280/ijdne.180611.
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Sansígolo, Cláudio Angeli, and Éder da Silva Ramos. "Quality of wood and pulp from a clone of Eucalyptus grandis planted at three locations." CERNE 17, no. 1 (March 2011): 47–60. http://dx.doi.org/10.1590/s0104-77602011000100006.
Abstract:
Eucalyptus grandis is one of the most popular species to use as raw material for pulp production in Brazil, as it provides excellent pulping, bleaching and papermaking results. The main objective of this study is to examine the quality of wood and pulp from a clone of Eucalyptus grandis, at age 4 years approximately, planted in three different soils, two of which being low fertility and one being a superior fertility soil, and their reflections on wood quality and pulping results. Chemical analyses of the soils followed guidelines developed by Raij et al. (2001), while physical and chemical properties of the wood followed ABTCP, TAPPI and ABNT standards. Chemical analyses of the soils pointed to lower fertility in Fazenda Limeira and Fazenda Tapera Queimada as opposed to higher fertility in Fazenda Mendes União. Results revealed stronger tendencies for the stand grown in the less fertile soils (Fazenda Limeira and Fazenda Tapera Queimada) in comparison to the stand grown in more fertile soil (Fazenda Mendes União) as to: higher wood and bark basic density, lower height and dry matter content, higher bark content, lower extractives content and higher holocellulose content, higher total and screened yields from pulping, lower specific wood consumption/t of pulp, and higher tear and tensile indices at low refining levels.
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Mutiara, Charly, and Yovita Yasintha Bolly. "Identification of Agricultural Activities and Soil Fertility in the Cultivation Area of Nuabosi Cassava." Caraka Tani: Journal of Sustainable Agriculture 34, no. 1 (March 10, 2019): 22. http://dx.doi.org/10.20961/carakatani.v34i1.25708.
Abstract:
<p>The low soil fertility is one of the causes of the reduction in cassava production in the Nuabosi area of Ende Regency. Therefore it is necessary to identify soil fertility and farmer activities on the land. This research used survey system by takes soil samples and farmers from ten fields in five villages, namely Ndetundora I, Ndetundora II, Ndetundora III, Embuteru and Randotonda. Determination of land were used purposive sampling method. Whereas farmer activity data is obtained by interviewing farmers whose land is used as land sampling. Variables observed were physical and chemical soil properties. The results of the analysis of agricultural activities can be described using existing theories. While the analysis results of the physical and chemical properties of the soil can be described using chemical criteria and soil fertility from the Bogor soil research center. The results of interviews and direct observations in the field showed that Nuabosi cassava farmers did not only plant cassava but also used conservative agricultural on their land. The physical properties of the soil analyzed showed that the soil was suitable for cassava plants. Based on soil fertility criteria, these lands have a limiting factor for C-Organic.</p>
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Arora, Charu, Vinita Tamrakar, and Dhruv Arora. "Chemical constituents and biological activities of Curcuma caesia." Research Journal of Chemistry and Environment 26, no. 2 (January 25, 2022): 141–48. http://dx.doi.org/10.25303/2602rjce141148.
Abstract:
The rhizomes of Curcuma caesia Roxb. (Family zingiberacea) are traditionally used to treat various ailments like piles, leprosy, asthma, cancer, wounds, impotency, fertility, toothache, vomiting leukoderma, tumours, bronchitis, etc. in Indian system of medicine. Rhizomes of C. caesia have been used as various ethnic herbal medicines by tribals. Several phytoconstituents have also been isolated and characterized. However, studies on correlation of phytoconstituents and medicinal properties are limited. The present study is an endeavor to do comprehensive review for the ethno-medicinal uses, pharmacology and phytochemistry of C. caesia. Pharmacological studies revealed the potent in vitro and in vivo bioactivities of various parts of C. caesia and other biological activities. Several phytoconstituents have been identified and isolated from C. caesia. Conclusions have been drawn from the literature reviewed and suggestions for future research are proposed. These findings may be utilized in the development of cost effective, safe and efficient novel drugs useful for treatment of cancer, piles, leprosy, asthma, wounds, impotency, fertility, toothache, vomiting, allergies and leukoderma.