Matthew Helmers, professor, Agricultural & Biosystems Engineering, Iowa State University, talks about the Iowa Nutrient Reduction Strategy and the practices that help to reduce nitrate loss. Presented at a seminar on cover crops in 2013.





This resource is part of the USDA-NIFA funded project for climate and agriculture that gathered data from 35 field sites and thousands of farmers in 9 Midwestern states, with the goal of creating a suite of practices for corn-based systems.