> I deal coverage for compost is 3 in per year. > to cover 1 acre of land 3 in deep is 1 million tons. Hmmmmm, 43560 sq. ft. per acre. Divide that by 4 (since 1 cubic ft. of material would cover 4 sq. ft. 3 in. deep) gives 10980 cubic feet of compost (now, that is a copiuos quantity of compost). If that volume weighed 1 million tons (2000000000 lbs) then each cubic ft. of compost would weigh just under 183654.73 pounds. That's just over 106 pounds per cubic inch. Or, for the metrically impaired, about 2963 grams per cubic centimeter. Any way you slice it, (assuming you could slice a material that densely packed), that compost would crush a pepper. Scott... call it "Black Hole" compost... KCK