Use of the End-of-Season Corn Stalk Nitrate Test in Iowa Corn Production
Download Full Text
Nitrogen (N) application is typically required for optimal corn yield and profitability. Rate selection is important, and can affect achieving both of those goals. There are in-season tests that can aid in N rate adjustment, such as soil nitrate testing and crop canopy sensing. An end-of-season test such as the corn stalk nitrate test (CSNT) cannot provide information for in-season rate adjustment, but instead provides information on N supply for the season that just ended. Research has shown that the concentration of nitrate in the lower corn stalk relates to N available to corn during the season.
Sawyer, John and Mallarino, Antonio P., "Use of the End-of-Season Corn Stalk Nitrate Test in Iowa Corn Production" (2018). Extension and Outreach Publications. 341.
Iowa State University Extension and Outreach publications in the Iowa State University Digital Repository are made available for historical purposes only. The information contained in these publications may be out of date. For current publications and information from Iowa State University Extension and Outreach, please visit