Posted 8/12/2022 00:39 (#9792533 - in reply to #9791663) Subject: RE: Equation-based analysis (ROI, NPK use efficiency, uptake)
NE South Dakota Clark, SD
You need to have check strips or blocks so you have something to compare to. You also need to do this on several fields to reduce variability of weather, topography. etc. Excellent yield data needs to be collected to verify as well.