Stalk Nitrate Sampling
Sample 1-3 weeks after 80% has reached black layer.
- Black layer generally occurs at grain moisture of 30-35%.
- Take an 8 inch segment of the stalk starting at 6 inches above the soil.
- Take 15 samples throughout an area up to 10 acres in size.
- Place the samples into a paper bag and mail to the lab.
- If the sample will be stored longer than a day before mailing, the sample should be refrigerated.