Posted 1/22/2017 11:30 (#5785557 - in reply to #5785363) Subject: RE: How to know when to side dress corn
WC Iowa
Maybe use the Iowa Late Spring soil nitrate test. The test used to be calibrated for the first week in June sampling and the nitrate level will tell you if you need more N and estimate how much. If my memory is correct above 25 ppm you don't need any more nitrogen.
How to know when to side dress corn
