I have use nitroform for yrs and a one time product is not what they sell. Nitroform will last about 3 months. I've been using it for 6 yrs and to get a decent result you must put down 3-4 app. Bshaffer I agree on the harness. I did 10lb/1000 on a football field and was not happy with the result. For the price of the harness they could have resodded the field 10 times that yr. Milorganite might work where you are, and it's a great product for the winter but that is it. I put it down on my greens for the winter. I would love to see some of yall pictures of your athletic fields I'm talking anyone who has pictures of the fields that you take care of. When I figure out how to put a picture on here I will do the one with 10lbs of harness.