Cornstalk nitrate interpretationIntegrated Crop Management News
AbstractSo you've gotten back the results of the cornstalk nitrate samples collected this fall. Now, what do the results mean? The stalk nitrate test is based on the concentration of nitrate-N in the lower cornstalk (8-inch segment from 6 to 14 inches above the ground) when the plant reaches maturity (ISU Extension publication PM 1584, Cornstalk testing to evaluate nitrogen management). In general, as the amount of plant-available N in the soil during the time period before plant maturity increases, nitrate in the lower stalk increases. However, the stalk nitrate-N concentration can be greatly influenced by other external and internal plant factors.
Copyright OwnerIowa State University
Citation InformationJohn E. Sawyer. "Cornstalk nitrate interpretation" (2006)
Available at: http://works.bepress.com/john-sawyer/69/