Knowledge is key to using your analytic results to their fullest. The Spectrum Agronomic Library provides you with useful information that will help you to better understand the complex science of agronomy. Our agronomists will be continually adding original and reprinted articles, so check the library regularly for new information.
Studies at Iowa State University (ISU) have shown that the nitrogen (N) status of a corn crop can be evaluated by measuring nitrate concentrations in the lower portion of cornstalks at the end of the growing season. This finding led to the development of a new tissue test that can be used to evaluate N management practices. Information in this paper relating to plant sampling and the interpretation of this test has been taken from their publication “Cornstalk Testing to Evaluate Nitrogen Management”, Pm-1584, Aug. 1994.