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.

2018 Multi-Location Wheat Nitrogen Rate Study

Nitrogen (N) is arguably the most important nutrient for wheat. As a vegetative nutrient, N drives tillering in wheat and ultimately the number of heads per square foot. The EONR this year was slightly lower than what we’ve observed in the past. This was due to the fact that we were able to capitalize on our “free N” from the soil (as a result of good conditions) to mineralize soil organic-N into plant available N. I’d encourage you to consider the potential for your soil to provide mineralized N when choosing the optimum N rate for your wheat.

2021 Iowa Corn Nitrogen Placement Study ANHYDROUS AMMONIA

Nitrogen Rate Study

2018 Multi-location Wheat Nitrogen Rate Study

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