nitrate leaching Articles
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Positive charge finding to change fertiliser management
The research in this article looks at the underlying assumption that soils in Western Australia (WA) are only negatively charged and so do not retain nitrate against leaching. It found that this is not based on scientific evidence. It discusses how soils vary in terms of positive and negative charge between areas and within individual farms and how a positive charge, measured as an anion ...
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Soil nitrate leaching in silvopastures compared with open pasture and pine plantation
Received for publication December 5, 2007. Wide acceptance of silvopasture as an alternative sustainable agricultural system in the southeastern United States will depend on an improved understanding of the tree-forage interactions and recognition of its environmental benefits. The objective of this study was to evaluate differences in soil nitrate leaching in different land-use systems, in north ...
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Soil nitrate leaching in silvopastures compared with open pasture and pine plantation
Wide acceptance of silvopasture as an alternative sustainable agricultural system in the southeastern United States will depend on an improved understanding of the tree-forage interactions and recognition of its environmental benefits. The objective of this study was to evaluate differences in soil nitrate leaching in different land-use systems, in north Florida. An 18-yr-old loblolly pine (Pinus ...
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Nitrate leaching from a potato field using adaptive network-based fuzzy inference system
The conventional methods of application of nitrogen fertilizers might be responsible for the increased nitrate concentration in groundwater of areas dominated by irrigated agriculture. Appropriate water and nutrient management strategies are required to minimize groundwater pollution and to maximize nutrient use efficiency and production. Design and operation of a drip fertigation system ...
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Monitoring of Nitrate Leaching in Sandy Soils: Comparison of Three Methods
Abstract Proper N fertilizer and irrigation management can reduce nitrate leaching while maintaining crop yield, which is critical to enhance the sustainability of vegetable production on soils with poor water and nutrient-holding capacities. This study evaluated different methods to measure nitrate leaching in mulched drip-irrigated zucchini, pepper, and tomato production systems. Fertigation ...
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Modelling Common Agricultural Policy–Water Framework Directive interactions and cost-effectiveness of measures to reduce nitrogen pollution
Selecting cost-effective measures to regulate agricultural water pollution to conform to the Water Framework Directive presents multiple challenges. A bio-economic modelling approach is presented that has been used to explore the water quality and economic effects of the 2003 Common Agricultural Policy Reform and to assess the cost-effectiveness of input quotas and emission standards against ...
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Mineral-nitrogen leaching and ammonia volatilization from a rice–rapeseed system as affected by 3,4-dimethylpyrazole phosphate
Received for publication November 9, 2008. 3,4-Dimethylpyrazole phosphate (DMPP) was validated as an effective nitrification inhibitor to reduce nitrate leaching. Its effects on ammonia (NH3) volatilization were not clear, especially on farmland scale with crop rotations. In this study, on-farm experiments at the Jiaxing (JX) and Yuhang (YH) sites in Taihu Lake Basin, China were conducted to ...
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Recovery of residual fertilizer-nitrogen by wheat in a winter wheat–summer maize rotation in the north china plain: A soil column study
Cropping systems is potentially useful practice for mitigating nitrate leaching and increasing nitrogen use efficiency (NUE) because deeper rooted crops could capture the leached N from previous shallower rooted crops. The recovery of fertilizer nitrogen (FN) applied to maize (Zea mays L.) by the succeeding wheat (Triticum aestivum L.) in a winter wheat–summer maize rotation in North China Plain ...
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Model-based investigations into long-term compost application effects on nitrate leaching at different agricultural sites
Organic waste materials may beneficially be used for fertilisation as well as for soil improvement on agricultural sites after composting and subsequent application. If compost is continuously applied at an annual scale of app. 10 Mg dry matter/ha, the content of organic matter in the soil will increase in the long-term, as shown in a field trial in Neu-Eichenberg, conducted 1985-97 by Univ. of ...
By ORBIT e.V.
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Nitrate leaching in two irrigated soils with different rates of cattle manure
Received for publication December 15, 2008. Manure applied to irrigated land may potentially contaminate groundwater with NO3–N. An 8-yr field experiment was conducted in southern Alberta, Canada, to determine the effects of different rates of manure on NO3–N accumulation in two irrigated soil types and NO3–N leaching to shallow groundwater. An annual cereal silage was grown at each site and ...
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Summer cover crop and management system affect lettuce and cantaloupe production system
Cover crops are widely used in both conventional and organic systems to protect and improve the soil. This study evaluated the effect of summer cover crop and management system on the production of fall romaine lettuce (Lactuca sativa L.) and spring cantaloupe (Cucumis melo L.) from 1999 to 2003. Cover crop treatments included cowpea [Vigna unguiculata (L.) Walp.] incorporated (CPI), cowpea used ...
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Modeling the impact of nitrate fertilizers on groundwater quality in the southern part of the Nile Delta, Egypt
The use of fertilizers in agriculture in Egypt, especially nitrogen, has increased significantly in the last decade, resulting in nonpoint contamination of the groundwater resources. This study investigated the effect of using nitrogen fertilizer on groundwater contamination with nitrate in the central southern part of the Nile Delta. NO3− concentrations in shallow groundwater were assessed ...
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Soil nitrogen mineralization and microbial biomass relation, and nitrogen conservation in humid-tropics
The reciprocal relationship between microbial biomass C (MB-C) and net nitrification in the seasonally dry tropics can reduce nitrate (NO3–) leaching losses, and be regarded as a mechanism of N conservation. The objective of the present study was to determine the influence of high seasonally prolonged rainfall on water-filled pore space (WFPS), net-nitrification rates (NNR), net-ammonification ...
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With Rising Fertilizer Prices, GroGuru’s Solution has Even More Value for Farmers!
Efficient use of water in commercial agriculture applications enabled by the GroGuru solution keeps fertilizer in the root zone of the crop, reducing Nitrate usage and leaching into the groundwater, and providing improved management capabilities for sustainable ...
By GroGuru
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Long term lessons from liming soil - Case Study
Long term trials have shown continuous cropping under a cereal legume rotation with district practice application of fertiliser N and retention of stubble caused a decrease in soil pH of up to 1.6 units over 14 years. Reduced N inputs can lessen this impact (as can stubble removal) but also decreases yield. At Wagga, the application of lime in combination with phosphorous (P) increased grain ...
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Cover crop effects on the fate of N following soil application of swine manure
Abstract Cereal grain cover crops increase surface cover, anchor corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] residues, increase infiltration, reduce both rill and interrill erosion, scavenge excess nutrients from the soil, and are easily obtained and inexpensive compared to other cover crop options. The use of cereal grain cover crops in fields where manure application occurs ...
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Potato response to a polymer-coated urea on an irrigated, coarse-textured soil
Controlled release fertilizers, especially polymer-coated urea (PCU), have been shown to reduce nitrate (NO3) leaching while maintaining potato (Solanum tuberosum L.) yields, but cost has been prohibitive. A new type of PCU (Environmentally Smart Nitrogen, Agrium, Inc., Calgary, AB) is less costly than previous PCUs, but its effectiveness on potato production has not been extensively studied. A ...
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The mineralization of nitrogen from compost in the tropics
The application of organic matter is very important in maintaining high and stable crop yields under tropical conditions. Most of tropical soils are characterised by low content of organic matter and low structure stability. Animal wastes contain many nutrients, including nitrogen, phosphorous, potassium and other minerals. In addition to supplying nutrients, the application of animal wastes also ...
By ORBIT e.V.
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Nitrapyrin
Nitrapyrin is an organic compound with the formula ClC5H3NCCl3. It is a widely used nitrification inhibitor in agriculture as well as a soil bactericide and has been in use since 1974. Nitrapyrin was put up for review by the EPA and deemed safe for use in 2005. Since nitrapyrin products is an effective nitrification inhibitor to the bacteria nitrosomonas it has been shown to drastically the ...
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19 Things the AP Got Wrong
The Associated Press recently published an article on “the secret environmental cost of U.S. ethanol policy.” There is much in this article that is too misleading, poor or deficient analysis, over-simplistic, or poorly drawn conclusions to comment on, but here are 19 big things the AP got wrong. The article seems to put the blame on Obama the candidate and the Obama administration. ...
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