Northeast Research and Demonstration Farm

Partial Nitrogen and Phosphorus Balance in Drainage Water Quality Plots, 2008–2015

Authors: John Sawyer (Iowa State University) , Michelle Soupir (Iowa State University) , Matthew Helmers (Iowa State University) , Antonio Mallarino (Iowa State University) , Daniel S. Andersen (Iowa State University) , Carl Pederson (Iowa State University) , Brian Dougherty (Iowa State University)

Abstract

The primary objective of this project is to determine the impact of swine manure applications to corn and soybean on nitrate leaching to groundwater. Another purpose of this long-term experimental study is to develop and recommend appropriate manure and nutrient management practices to producers to minimize water contamination potential and enhance the use of swine manure as an organic fertilizer. A third component is to determine the potential effects of rye as a cover crop to reduce nitrate loss to shallow groundwater. As part of the study, partial nitrogen (N) and phosphorus (P) balances were calculated to determine whether the cropping systems were in positive or negative N and P balance over time.

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How to Cite: Sawyer, J. , Soupir, M. , Helmers, M. , Mallarino, A. , Andersen, D. S. , Pederson, C. & Dougherty, B. (2019) “Partial Nitrogen and Phosphorus Balance in Drainage Water Quality Plots, 2008–2015”, Iowa State University Research and Demonstration Farms Progress Reports. 2018(1).