Recommended rates range from 40 to 120 pounds of K2O per acre depending on soil test K and desired production level. Additional applications of 80-100 pounds of K2O per acre are recommended after every other hay cutting or grazing period if high and very high levels of production are desired. If stands become weak, consider applying K just ahead of the last hay cutting or grazing period in the fall. This ensures that plants are healthy as they go into the winter. Back To Top Secondary Elements and Micronutrients Calcium Calcium levels are normally adequate as long as liming needs are met.
Dolomitic limestone is recommended as an alternate liming source since it supplies magnesium.
Dolomitic lime is available from near Black Rock, Salem and other quarries in northern Arkansas and from the state of Missouri. Very little research data is available to show that increased bermudagrass yields result from correcting low levels of magnesium in soils. Improving forage quality and preventing animal health problems may be the major benefits from the addition of magnesium. Potassium magnesium sulfate is a commercially available fertilizer that contains magnesium in addition to potassium and sulfur. Back To Top Sulfur Sulfur deficiency in bermudagrass has not been considered a major problem in the past.