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321   Do not over-fertilize with nitrogen or apply nitrogen fertilizer after August 15.  To achieve darker green color, broadcast iron containing product or foliar apply on the turf a liquid solution of iron sulfate (dissolve 2 ounces iron sulfate in 4 gallons of water) including a surfactant (5 drops of a dishwasher detergent) per 1,000 square feet, or foliar apply a chelated iron source following label instructions.  An iron solution treatment should be made as needed for green turf color between regular fertilizer applications in April and July for locations in the Piedmont and in March, July and September for the Coastal Plains (consider turf fertilizers that contain iron).  Foliar apply the iron-containing solution in the late afternoon only when the air temperature is greater than 80^oF and soil moisture is adequate for good turf growth.

389      In the spring when the grass is fully green, broadcast 1/2 lb triple superphosphate (0-46-0) and 6 lbs 15-0-15 or equivalent fertilizer per 1,000 square feet, and then repeat in July.  (Recommendation when phosphorus and potassium soil test are L-L, L-M, L-S, M-L, M-M, M-S)

390       In the spring when the grass is fully green, broadcast 1/2 lb triple superphosphate (0-46-0) and 2 lbs of a fertilizer containing around 30% nitrogen (such as 29-2-2, 29-2-5, 28-4-4, 29-2-5, or equivalent) per 1,000 square feet, and then repeat in July.  (Recommendation when phosphorus and potassium soil tests are L-H, L-EX, M-H, M-EX)         

391   In the spring when the grass is fully green, broadcast 6 lbs 15-0-15 or equivalent fertilizer per 1,000 square feet, and then repeat in July.  (Recommendation when phosphorus and potassium soil tests are S-L, S-M, S-S, H-L, H-M, H-S, EX-L, EX-M, EX-S)

392   In the spring when the grass is fully green, broadcast 2 lbs 34-0-0 per 1,000 square feet, and then repeat in July.  (Recommendation when phosphorus and potassium soil tests are S-H, S-EX, H-H, H-EX, EX-H, EX-EX)

411   The extent of growth can be controlled by the amount of nitrogen fertilizer applied, low maintenance at the rate between 1 to 2 lbs nitrogen per 1,000 square feet per year, high maintenance between 2 to 3 lbs nitrogen per 1,000 square feet per year.  If the grass clippings are removed, the amount of fertilizer applied should be increased by 25% and the turf soil tested every other fall to determine what additions of phosphate and/or potash will be needed to sustain vigorous growth.

535   Broadcast dolomitic limestone as recommended, either in the fall or early spring.