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Urea and Urea Additives as Fertilizer Sources for Corn Production in Minnesota

Study author(s): Fabián Fernández, Karina Fabrizzi, Jeffrey Vetsch, and Daniel Kaiser, University of Minnesota, Department of Soil, Water, and Climate
Years of study: 2017 – 2019
Location(s): Crookston MN, Morris MN, Lamberton MN, Waseca MN

Important: for the complete report, including all tables and figures, please download using the links to the right.

Read Full 2017 Report
Read Full 2018 Report
Read Full 2019 Report


  • Fall urea is problematic due to wet springs and warmer falls/winters. While this is a preliminary analysis, most likely current BMP’s for wester Minnesota will need to be adjusted to reflect changes in weather and cropping conditions as reflected in this study.
  • All variables equal, spring applications produced more grain than fall applications.
  • Anhydrous ammonia is superior to urea, especially in the fall.
  • Banding urea (SSB) or using ESN in the fall had limited advantage.
  • The use of the nitrification inhibitor Instinct with urea did not increase yield.
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