Project ID

E2009-22

Abstract

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.

Key Question

Are there Iowa cropping systems that retain N, reduce the risk of nitrate N leaking into shallow municipal aquifers and are workable for producers?

Findings

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.

Principal Investigator(s)

Robert De Haan

Co-Investigator(s)

Ronald Vos, Matthew Schuiteman, Nelva Huitink, Rebecca Ohrtman, Harla Kruid, Matthew Van Schouwen

Year of Grant Completion

2015

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