Drought Induced Potassium Deficiency

Potassium deficiency in corn and soybean are more prevalent during times of drought. The diagnostic yellowing/chlorosis along leaf margins is seen in older leaves in both soybeans and corn. Potassium is responsible for water regulation (opening and closing of stomates) in the plant and is important to have adequate levels, especially during times of drought. Potassium is best managed through soil sampling and broadcasting fertilizer (or manure) to bring levels into the optimal range before planting. Below is video from Purdue University with Jim Camberato and John Obermeyer titled “Potassium Deficient Corn and Soybean During Drought”: