If you put your soil test results into the calculator, you can determine how much litter you need and what supplementation might also be needed.  In this example, we have in field ABC, N at 2 lb/ac, Soil Test P Index of 10/acre, Potassium at 120 lb/ac, pH 5.5.  We plan to grow Bermudagrass with a yield goal of 3 tons/ac.