Earth science, 20 lb, 5,000 sqft coverage, natural fertilizer & lawn food plus, helps repair soil & feed your lawn, as effective as synthetic fertilizers with the benefits of adding organic matter, calcium, humic acid & micronutrients to the soil, nutri-lock technology which holds nutrients in place for maximum effectiveness & reduction of nutrient run off, dried dairy cow manure mulch with 50% more macronutrients, rich in organics to jump start soil biology, 1 application feeds the lawn & the soil all season long.