The primary objective of this study is to evaluate the impact of various cropping and nutrient management systems on drainage water quality and crop yields. Treatment comparisons evaluate the impact of liquid swine manure application timing, nitrification inhibitor with late fall swine manure application, cereal rye cover crop, and gypsum application. These comparisons will be conducted for multiple years and used to develop appropriate manure and nutrient management practices in order to minimize water contamination potential and enhance the use of swine manure as a nutrient resource.
How to Cite: Sawyer, J , Soupir, M , Helmers, M , Mallarino, A , Andersen, D , Pederson, C & Dougherty, B . (2019) “Drainage Water Quality Impacts of Agricultural Management Practices: Effect of Manure Application Timing and Cover Crops on Yields in 2016–2018”, Iowa State University Research and Demonstration Farms Progress Reports. 2018(1).