## Compost Calculator[ Reset ] [ Calculate ] [ Notes ] [ Reset ] [ Calculate ] [ Notes ] ## Notes(1) Equal to % Organic Content of Backfill minus % Organic Content of Existing Topsoil (2) Product of the bulk density of soil, the wt. of water: 62.4 lbs/C.F. (0.0312 T/C.F.) & sq. ft. in an acre. (3) Product of the bulk density of the compost & the wt. of water: 62.4 lbs/C.F. (0.8424 T/C.Y.) (4) Product of the bulk density of the soil & the wt. of water (0.8424 T.) (5) Product of the tons of compost required per ton of soil & the wt. of a C.Y. of soil. (6) Product of the tons of compost required per ton of soil & the wt. of a C.Y. of compost. (7) Product of the tons of compost required per ton of soil & tons of soil per ac. ft. (8) Tons of compost req. per ac. ft. of soil divided by wt. of a C.Y. of the compost (9) C.F. of compost req. per ac. ft. divided by 43560 S.F. per ac. and the 12" depth of a C.F. In calculating the weight of an acre-foot of soil, soil is compared to water in weight. When a soil has a density of 1.32, it means the soil weighs 1.32 times more than the equivalent amount of water. ## Approximate Bulk Density of Various Soil Texture Classes
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