Wheat Yield and Quality as Influenced by Coated Nitrogen (ESN) Timings, Rates and Mixtures with Urea


Start Date: 2012

Principal Investigator: Nancy Jo Ehlke

Organization: University of Minnesota, Department of Agronomy and Plant Genetics

Status: Complete

Background Information:

Nitrogen (N) is the most expensive plant nutrient for farmers. In fact, 2012 crop budgets for spring wheat and perennial ryegrass indicated N alone was approximately 35 percent of the direct costs (Minnesota State Colleges and Universities Farm Business Management). Further, environmental issues, coupled with economics of today’s agricultural crop production, require a greater understanding of the use of N to minimize environmental impacts while maximizing crop production for Minnesota farmers.


Research objectives are to compare the standard urea with a coated urea applied at various timings, rates and mixtures in a spring wheat under seeded to perennial ryegrass. Coated urea may allow increased rates of nitrogen to be applied “down the tube” at planting, when combined with phosphorus and potassium without injury to the wheat and ryegrass seedlings. This coated urea product may offer the potential to improve wheat yield and quality (protein), especially if the product is not released into the soil solution until later in the plant developmental stages of the spring wheat.

Key Findings:

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