|Plant Part and Time:||Upper half of the plant taken prior to seed head formation.|
|Element and Sufficiency Range||Interpretation and Recommendations|
Deficiency due to inadequate or ineffective N fertilization. If nitrogen is low apply 75-100 pounds N per acre after each harvest. High N is due to excessive fertilization and luxury consumption; therefore, reduce application rates. Nitrogen content will decrease with age of plants; therefore, low N may indicate late harvested grass.
Deficiency due to low soil test P and/or inadequate P fertilization. If P is low in the tissue apply 80-100 pounds P2O5 per acre. For succeeding years soil test and follow soil test recommendations. Maintain soil pH at recommended level.
Deficiency due to low soil test K and/or inadequate K fertilization. If K is low in the tissue, apply 150-300 pounds K2O per acre, adjusting the rate based on the number of harvests remaining for the current growing season. If more than 150 pounds K2O per acre is used, split the application. Potassium content will decrease with age of the plant; therefore, low K may indicate late harvested grass. The K content of well fertilized Coastal will approach the upper end of the sufficiency range at the first harvest and the lower end of the range at the last harvest. High K levels indicate luxury consumption due to excessive fertilization. For succeeding years soil test and follow soil test recommendations.
Deficiency is not likely to occur. Calcium content of plant will increase with age. Maintain soil at proper pH and level of other essential elements.
Deficiency not likely to occur unless the soil pH and/or soil test Mg level is low. Deficiency may be induced by heavy applications of K and N fertilizers. Deficiency can be prevented by liming with dolomitic limestone. When Mg is low apply 25 pounds Mg per acre.
Sulfur deficiency may occur on sandy soils under intensive management and where low S containing fertilizers have been used for extended periods. Low S can normally be corrected by including 25 pounds S per acre in the fertilizer program. The optimum N:S ratio should be maintained between 10:1 to 15:1 for ruminant nutrition.
Deficiency is not likely to occur. High Mn due to a low soil pH which indicates need to lime. Soil test and lime according to the recommendations.
Deficiency is not likely to occur.
Deficiency may occur on deep sandy soils. Deficiencies can be corrected by applying 1 pound of actual B per acre.
Deficiency is not likely to occur. High Cu levels may occur when sewage sludge or animal manures are applied in repeated heavy applications.
Deficiency is not likely to occur. High Zn levels may occur when sewage sludge or animal manures are applied in repeated heavy applications.
Element probably not a factor in plantnutrition.