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Impacts of Cover Crops on Phosphorus and Nitrogen Loss with Surface Runoff
Iowa State Research Farm Progress Reports
  • Antonio Mallarino, Iowa State University
  • Richard Cruse, Iowa State University
  • Dan Jaynes, Iowa State University
  • John Sawyer, Iowa State University
  • Pablo Barbieri, Iowa State University
Ag Engineering/Agronomy, Central Iowa and BioCentury Research Farms
Extension Number
RFR A14117
Publication Date
Iowa research has demonstrated that cover crops can improve soil productivity and water quality by increasing soil organic matter and reducing nitrate nitrogen (N) leaching. Other research has investigated and is investigating the agronomic and economic viability of using cereal rye cover crops in continuous corn or corn-soybean rotations. However, no Iowa research has evaluated under natural rainfall the impact of cover crops on phosphorus (P) and N loss with surface runoff interacting with other management practices. The need for this type of research was indicated in the Iowa Nutrient Reduction Strategy documents. This effort assessed what would be needed to reduce N and P exports from point and nonpoint sources by 45 percent, which is what EPA estimates is needed to reduce the size of the hypoxic zone in the Gulf of Mexico.
Copyright Owner
Iowa State University
File Format
Citation Information
Antonio Mallarino, Richard Cruse, Dan Jaynes, John Sawyer, et al.. "Impacts of Cover Crops on Phosphorus and Nitrogen Loss with Surface Runoff" (2015)
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