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Single vs. Split Potassium Applications for Coastal Bermudagrass¹

Synopsis: Splitting annual potash applications increased hay yields of Coastal bermudagrass only as available potassium in the soil reached a very low level. Splitting potash applications, however, consistently increased available potassium in the soil over single applications. Luxury consumption of potassium can be reduced by making split applications of potash at no more than half the nitrogen rates on soils kept low in available potassium.

² Geneticist and Agronomist, respectively, Crops Research Division, ARS, USDA, and University of Georgia, College of Agriculture Exp. Sta., Georgia Coastal Plain Exp. Sta., Tifton, Georgia.