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- W3140183146 abstract "Abstract The midwestern United States is a highly productive agricultural region, and extended crop‐free periods in winter/spring can result in nitrogen (N) and phosphorus (P) losses to waterways that degrade downstream water quality. Planting winter cover crops can improve soil health while reducing nutrient leaching from farm fields during the fallow period. In this study, we used linear mixed effects models and multivariate statistics to determine the effect of cover crops on soil nutrients by comparing fields with cover crops ( n = 9) versus those without ( n = 6) in two Indiana agricultural watersheds: the Shatto Ditch Watershed, which had >60% of croppable acres in winter cover crops, and the Kirkpatrick Ditch Watershed, which had ∼20%. We found that cover crops decreased soil nitrate‐N by >50% and that the magnitude of reduction was related to the amount of cover crop biomass. In contrast, cover crops had variable effects on water extractable P and Mehlich III soil test P. Finally, cover crop biomass significantly increased soil N mineralization and nitrification rates, demonstrating that cover crops have the potential to supply bioavailable N to cash crop after termination. Our study showed that widespread implementation of winter cover crops holds considerable promise for reducing nutrient loss and improving soil health. The degree to which these results are generalizable across other systems depends on factors such as climate, soil characteristics, and past and current agronomic practices." @default.
- W3140183146 created "2021-04-13" @default.
- W3140183146 creator A5046705171 @default.
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- W3140183146 date "2021-05-01" @default.
- W3140183146 modified "2023-10-05" @default.
- W3140183146 title "Effect of winter cover crops on soil nutrients in two row‐cropped watersheds in Indiana" @default.
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- W3140183146 doi "https://doi.org/10.1002/jeq2.20217" @default.
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