This on-farm experiment tested five different cropping systems with the potential to improve nitrate N management in the capture zones of community water supplies in the upper Midwest. Residual soil nitrate N concentrations were determined for each system in order to estimate the likelihood of nitrate N leaching from the system. An economic analysis also was conducted.
Are there Iowa cropping systems that retain N, reduce the risk of nitrate N leaking into shallow municipal aquifers and are workable for producers?
Yes, but the systems with the greatest potential for retaining nitrate N utilize perennial grasses and legumes which may be less profitable than corn and soybean.
Robert De Haan
Ronald Vos, Matthew Schuiteman, Nelva Huitink, Rebecca Ohrtman, Harla Kruid, Matthew Van Schouwen
Year of Grant Completion
De Haan, Robert; Vos, Ronald J.; Schuiteman, Matthew; Huitink, Nelva; Ohrtman, Rebecca; Kruid, Harlan; and Van Schouwen, Matthew, "Performance of cropping systems designed to reduce nitrate leaching into shallow municipal well aquifers" (2015). Leopold Center Completed Grant Reports. 496.