The Presidedress Soil Nitrate Test for Improving N Management in Corn
Erickson, Bruce, Groff, Mike, Brouder, Sylvie
Nitrogen fertilizer is essential for profitable corn yields but it is also a major production cost and can contribute to environmental degradation. Recent studies have demonstrated that soil nitrate testing could improve the agronomic efficiency of fertilizer N applications and reduce the potential for water quality problems associated with N use on cropland in the eastern cornbelt. The pre-sidedress soil nitrate test (PSNT) can predict the amount of organic N that will be mineralized to plant available forms of N (ammonium and nitrate) during the growing season. Research conducted in humid regions of the US including Indiana suggests that the PSNT is effective for predicting whether corn will be responsive to N sidedressing.
Current Status: Approved
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|Time To Complete (hours)
- 1. Describe how the presidedress nitrate test can be used to manage nitrogen fertilization in corn.
- 2. Explain the sampling protocol for the presidedress nitrate test.
- 3. Interpret spring nitrate testing results to make fertilizer recommendations for a field.