The purpose of this study is to evaluate the economic optimum nitrogen rate (EONR), which is the rate of nitrogen that maximizes a crop’s profitability.

In 2017, yield data from the nitrogen (N) rate study at Beck’s KY PFR site showed that 100 units/A. resulted in the second highest yield at 109.8 Bu./A., and the greatest net return at $424.34/A. While net returns will vary with N costs, the five-year economic optimum nitrogen rate has remained around 100 units/A. It’s important to note that the rate of 140 units/A. resulted in decreased yields in 2017 due to lodging.

5-YEAR KENTUCKY ECONOMIC OPTIMUM NITROGEN RATE

2021 Iowa Corn Nitrogen Placement Study ANHYDROUS AMMONIA

Nitrogen Rate Study

2017 Kentucky Wheat Nitrogen Rate Study

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