The End-of-Season Cornstalk Test for Excess Nitrogen
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The Iowa State University Integrated Crop Management Conference is Iowa's premier crop production education event. No other program in Iowa brings together the diverse range of topics, slate of expert presenters and results of the latest University research.
The ICM Conference offers workshops focusing on the latest in crop production technology. Experts from Iowa and surrounding states will provide research updates and results in soil fertility, soil and water management, crop production and pest management.
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Abstract
Recent studies have shown that the N status of a corn crop can be assessed by measuring nitrate concentrations in the lower portion of cornstalks at the end of the growing season. This finding lead to the development of a new tissue test that can be used to evaluate N management practices used in any field in any year. This evaluation gives feedback that can be used to improve N management. The test is called the "end-of-season cornstalk test". It is a management tool that should be of interest to all corn producers and all who advise corn producers. The purpose of this paper is to describe the test and how it should be used.