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Showing 1 to 20 of 42 for “"nitrate leaching"”.
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Risk assessment formulation for nitrate leaching
… (Ver 2.1) model was used to simulate NO₃-N leaching below the root zone for different land application rates of liquid dairy waste for fields in Georgia and Texas. Probability distributions of yearly-maximum nitrate concentrations were developed for each application rate at each site using …
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Agronomic and Nitrate Leaching Impacts of Pelletized versus Granular Urea
… silage yield, corn nitrogen (N) removal, and nitrate-N (NO₃⁻-N) leaching from urea pellets (1.5 g each) and granules (0.01-0.02 g each) applied at 184 kg-N/ha were compared. A control treatment (no N) and two other N application rates (110 and 258 kg-N/ha) were also included. Urea particle …
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Irrigation management effects on nitrate leaching and mowing requirements of tall fescue
Irrigation management may influence nitrate leaching under tall fescue (Festuca arundinacea) and also affect its mowing requirements. Two experiments were conducted on tall fescue growing on a Chase silt loam soil near Manhattan, Kansas. Each experiment was arranged in a split-plot design, with …
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A model of nitrate leaching from agricultural systems in the northern neck of Virginia
… simulate the long-term effects of nitrogen (N) leaching to groundwater in the Northern Neck region of Virginia, and ultimately to the Chesapeake Bay. VTCROPS simulates N fate and transport in a soil-plant-atmosphere continuum in a vertical slice between two crop rows, enabling consideration of …
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Effect of urinary nitrogen, dairy shed effluent and nitrogen fertiliser on nitrate leaching from a pasture soil
Environmental concerns over nitrate-N contamination of surface and groundwater have led to a number of studies on nitrate-N leaching from grasslands. Most studies of nitrate-N leaching loss from grassland have focused solely on single nitrogen (N) sources (e.g. fertiliser. urine, dung or effluent). …
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Influence of nitrogen rate on corn grain yield, nitrogen use efficiency, and nitrate leaching on coarse-textured Minnesota soils
… Nitrogen poses a threat to water quality in its nitrate form because it is easily leached through the root zone of the corn (Zea Mays L.) crop following rain and irrigation events. Leaching is enhanced in sandy soil conditions because sandy soils are particularly well drained. In this study, N …
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Estimation and mitigation assessment of N₂O emission and nitrate leaching in a mountainous catchment in South Korea using the LandscapeDNDC model
… highly susceptible to loss as N2O emission and nitrate leaching during heavy rainfall events in the monsoon season. Intensive farming conducted in the Haean catchment of South Korea has received much attention due to its geographical importance as an upstream region of the Soyang River Dam, …
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The potential effectiveness of eco-n nitrification inhibitor in reducing nitrification rates in a range of key New Zealand dairy pasture soils: A dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science with Honours
Increasing public concern over nitrate leaching from intensive agriculture, has led to a demand for accurate scientific research into nitrate leaching losses and the development of mitigation strategies to inhibit the detrimental effects of nitrate leaching on the environment and human health. …
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The effects of winter cover cropping on nutrient leaching through repacked soil columns
… of oats/hairy vetch cover crop had 92% less nitrate leaching (total mass) over the growing period than bare soil. Additionally, a 65% increase in cover crop growth was shown to significantly decrease nitrate leaching compared to a thinner stand of cover crops within 95% confidence limits. …
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Synthesis of zeolites and their application as soil amendments to increase crop yield and potentially act as controlled release fertilizers.
… as controlled release fertilizers to decrease nitrate leaching. Nitrate pollution of groundwater is a major agro-environmental concern. The zeolites Phillipsite and Linde-type F were synthesized from aluminosilicate gels; ion exchanged to introduce ammonium and characterized using X-ray …
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A biogeochemical analysis of Miscanthus x giganteus under nitrogen fertilizer treatments and across multiple soil types
… soil organic matter (SOM), and inorganic N leaching at five sites in the eastern U.S., and nitrous oxide (N2O) and carbon dioxide (CO2) emissions at one site (Illinois). Miscanthus x giganteus was planted during the spring of 2008 at Urbana Illinois, Lexington Kentucky, Mead Nebraska, and …
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Optimizing Cover Crop Integration: Early Establishment Methods and Technological Approaches for Enhanced Biomass and Nitrogen Management in the Mid-Atlantic
… various incorporation techniques—can reduce nitrate leaching and enhance biomass production, compared to broadcasting or drilling CCs 4-weeks post-harvest. Four seeding methods were tested across a range of CC species, including cereal rye (Secale cereale L.), hairy vetch (Vicia villosa …
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Legacy effects of cover crop monocultures and mixtures on soil inorganic nitrogen, total phenolic content, and microbial communities on two organic farms in Illinois
… influence of cover crops on soil inorganic N (nitrate, ammonium, and potentially mineralizable N, PMN) and total phenolic content intensity, as measured by the integrated area under the curve of the three sample dates plotted against time. I found that Brassica monocultures, the most productive …
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Nitrogen Management in No-till Winter Wheat Production Systems
… N rate prediction methods, or potential NO3 leaching under no-till wheat in soils and climate similar to the mid-Atlantic region. The objectives of our research were: (1) to determine economic optimum N fertilization rates and timings; (2) evaluate selected methods for predicting optimum N …
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ENHANCED SOIL STRUCTURING BENEATH WHITE CLOVER AND ITS IMPACT ON NUTRIENT TRANSPORT
… solution to reduce the environmental impacts of nitrate leaching from agricultural land. There are, however, potentially negative impacts associated with improving soil aggregation through the use of clover that need further investigation. It appears that legume-based systems are not …
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Investigation of Chalcopyrite Leaching Kinetics by Alternative Leaching Chemicals
… sulfide mineral due to passivation during leaching process in a conventional leaching system. In this study, alternative lixiviants, MSA (methanesulfonic acid, CH4SO3) and sulfurous acid (H2SO3) were investigated to enhance leaching kinetic. In addition, alternative oxidants, hydrogen …
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Simulated effects of agricultural management systems on potential nonpoint source loading of nitrate and pesticides
… differences in potential pesticide and nitrate movement to groundwater as affected by several combinations of tillage, cropping, and nutrient and pesticide management practices. The study area is in Richmond County in the Coastal Plain region of Virginia. Alternative management scenarios …
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Nitrogen modeling of potato fields in the Bolivian Andes using GLEAMS
… N pool; validation of the percolation volume and nitrate leaching losses; and improved model representation of banded manure application.
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Evaluating post-fire woody mulch effects on soil and stream nitrogen
… turnover and loss of soil C and N in laboratory leaching trials and hillslope field settings, and then compared post-fire C and N in streams draining mulched and unmulched catchments. In the laboratory, we quantified C and N inputs and leaching outputs from mulched and unmulched soil columns. …
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