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Potassium Fertilization of Corn and Soybean

Study author(s): Jeffrey Vetsch and Daniel Kaiser, University of Minnesota, Department of Soil, Water, and Climate
Years of study: 2011 – 2018
Location(s): Waseca, MN and Rochester, MN

Important: for the complete report, including all tables and figures, please download using the link(s) to the right.


Potassium fertilization research continued at two locations (Waseca and Rochester) in 2018. This study measured the effects of fertilizer K rate at different STK levels on crop yield, K removal in grain and economic return to K fertilizer application. These data are currently being used to modify K fertilizer guidelines for corn and soybean. New guidelines are planned to be released this spring or early summer in electronic form via the nutrient management website (also on Twitter and Facebook pages).

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