I have a 10,500 sq ft yard of new Kentucky Bluegrass sod. It was put in in late July so Im ready to do the first application of fertilizer. I waited this long because I did not want to proceed without getting a soil report first. I have that now and it reports that, per year / per 100 sq ft, I need 4 lbs of nitrogen (high maintenance schedule because of sprinkler system), 1.2 lbs of phosphate and 1.3 lbs of potassium. So Im thinking I need to find something with a 4-1-1 ratio. Is there a brand or source you could steer me towards? If my math is correct, Ill need to lay down about 42 pounds of N, and 12-13 pounds each of P and K per year for my lawn. What is the best schedule for doing this?