Fig. 4
From: Late-season corn stalk nitrate measurements across the US Midwest from 2006 to 2018
Percentage of CSNT categories per year for corn following corn (a) and corn following soybean (b) rotations. Number of corn fields per year are displayed at the top of the corresponding bar. Only data for fields having a total N rate <450 kg/ha are displayed (see Technical Validation).
