McNay Memorial Research and Demonstration Farm

Potassium Fertilizer Effects on Yield of Corn and Soybean and on Potassium Uptake and Recycling to the Soil

Authors: Antonio P. Mallarino (Iowa State University) , Ryan R. Oltmans (Iowa State University) , Nicholas Piekema (Iowa State University)

Abstract

Research has been conducted in Iowa to investigate potassium (K) fertilization of corn and soybean, but not at this farm. Insufficient K amounts in the soil or applied with fertilizer or manure significantly decreases crop yield end economic benefits to growers. Also, research in other locations has shown large soil-test K temporal variability within a season or from the fall to spring. Therefore, a study was initiated in 2009 to investigate these issues

Keywords: RFR A12123, Agronomy

How to Cite: Mallarino, A. P. , Oltmans, R. R. & Piekema, N. (2013) “Potassium Fertilizer Effects on Yield of Corn and Soybean and on Potassium Uptake and Recycling to the Soil”, Iowa State University Research and Demonstration Farms Progress Reports. 2012(1).