(2006) Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn, April 2006. Iowa State University Extension
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Abstract
Nitrogen (N) is typically one of the largest corn fertilization expenses. Nitrogen application is critical because it signifi cantly improves corn yield in many crop rotations. When choosing N rates, producers need to carefully consider both achieving most profi table economic return and advancing environmental stewardship. In 2004, university agronomists from the Corn Belt states began discussions regarding N rate use for corn production. The reasons for the discussions centered on apparent differences in methods for determining N rates across states, misperceptions regarding N rate guidelines, and concerns about application rates as corn yields have climbed to historic levels. An outcome of those discussions was an effort with the objectives to: ▪ develop N rate guidelines that could be applicable on a regional basis and ▪ identify the most profi table fertilizer N rates for corn production across the Corn Belt. This publication provides an overview of corn N fertilization in regard to rate of application, investigates concepts for determining economic application rates, and describes a suggested regional approach for developing corn N rate guidelines directly from recent research data.
| Item Type: | Departmental Report |
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| Keywords: | Crom, Yields, Crops, nitrogen |
| Subjects: | Agriculture and food production > Crops Agriculture and food production > Crops > Corn Agriculture and food production |
| ID Code: | 3847 |
| Deposited By: | Margaret Barr |
| Deposited On: | 11 Jul 2006 |
| Last Modified: | 11 Jul 2006 |
| URI: | https://pubdev.silo.lib.ia.us/id/eprint/3847 |