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- W3125957519 abstract "This article presents a modeling system for identifying the spatial patterns of potential water pollution from N fertilizer use in the central USA. The model uses a geographic information system (GIS) and a statistical technique to integrate an environmental process simulation model with spatially referenced databases on crop management and resource characteristics. The potential for NO 3 -N runoff and leaching was estimated for a total of 128 591 sites using information on soil, climate, crop, rotation, tillage, irrigation, and conservation practices at each site. For the entire study region, the average annual NO 3 -N runoff and leaching, respectively, were estimated to be 5 and 3 kg ha -1 , which accounted for about 7 and 4% of total N applied. The potential for NO 3 -N runoff was relatively high in much of the Corn Belt, Kansas, and the Nebraska Platte River Basin, and the potential for NO 3 -N leaching was relatively high in Ohio, Indiana, and southern Illinois and Missouri. Because much of the area with high leaching potential was tile drained, a large portion of the leached NO 3 -N will be discharged to surface water, rather than continue downward to ground water. Finally, the model was applied to estimate the effects of a 25% reduction in N application rates and adoption of crop rotations on potential NO 3 -N runoff and leaching." @default.
- W3125957519 created "2021-02-01" @default.
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- W3125957519 date "1999-01-01" @default.
- W3125957519 modified "2023-09-27" @default.
- W3125957519 title "Metamodeling Potential Nitrate Water Pollution in the Central United States" @default.
- W3125957519 hasPublicationYear "1999" @default.
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