The recommended timing for the Pre-Sidedress Nitrate Test (PSNT) is between V4 and V6, when most roots are concentrated in the top 12 inches of soil. Samples should be collected to a depth of 12 inches to accurately assess nitrate availability for sidedress decisions.
The recommended timing for the Pre-Sidedress Nitrate Test (PSNT) is between V4 and V6, when most roots are concentrated in the top 12 inches of soil. Samples should be collected to a depth of 12 inches to accurately assess nitrate availability for sidedress decisions.