Nutrient management is applying the correct amount and form of plant nutrients for optimum yield and minimum impact on water quality. After taking a soil test, setting realistic yield goals, and taking credit for contributions from previous years’ crops and manure applications, crop nutrient needs are determined. Nutrients are then applied at the proper time by the proper application method.

Nutrient sources include animal manure, sludge, and commercial fertilizers. These steps reduce the potential for nutrients to go unused and wash or infiltrate into water supplies. Sound nutrient management reduces input costs and protects water quality, by preventing over application of commercial fertilizers and animal manure. Correct manure and sludge application on all fields can improve soil tilth and organic matter.

Choose the best application method. Use broadcast, starter, surface band or injection. Use the late spring nitrogen test when appropriate when corn plants are between 6-12 inches tall. Refrain from applying commercial nitrogen in the fall except if N is associated with P application. Avoid applying manure on frozen or snow-covered ground if possible. Test soils once every three years according to Extension recommendations. Analyze manure and other organic waste for nutrient content before field application. Establish a winter cover crop if there’s a possibility of nitrogen leaching because of poor crop yield.