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1. Manure Source and Rate Effects on Soil Test Levels and Corn GrowthNutrient management planning has become an important tool in an effort to improve water quality. In Wisconsin, nutrient management regulations are in the process of moving to a phosphorus (P) based standard. As such, P budgeting and the P index will greatly influence manure applications. Thus, there is a need to better understand how soil test P changes with respect to a P based manure application. In Wisconsin, only 60 % of the total P applied in manure is considered to be available to the crop... |
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