Model 16-20-0 - Bagged Fertilizer
From Bagged Fertilizer
Starter Fertilizer used in areas with little or no sand. If you have sand than 13-13-13, 10-20-10, 16-8-8 or 30-10-10 would be a better choice. Sandy soils need the last number Potash while most clay soils have some Potash.
Start 1/4 open and adjust
10,500 sq. feet on average