On Thu, 23 Mar 2000 GarryMass@aol.com wrote: > Finally, my recall of composting by the acre is that approx. 200,000 lbs. of > compost will cover an acre to about three inches deep. Given that number, I > can see where a decimal might have run away and hid. A forty pound bag > (35-38 quarts) of composted manure covers one square yard of my raised beds > at 3+ inches. 40lbsXCameron's 4840sq.yd./acre=193,600lbs. If it covered 1 square yard at 3 inches that would be 9/4 cubic feet of material, or 2.25 cubic feet in decimal. A cubic foot of water would weigh about 62 lbs, so if that's a 40 pound bag, it's not very dense manure. 40 lbs / 2.25 cu.ft. = 17.8 lbs/cu.ft. or a specific gravity of 0.29 which sounds pretty low to me. (Water has a specific gravity of 1.0) Is that 40 lb bag really 18" x 36" x 6" thick? FWIW, 35 quarts is 1.17 cubic feet, not the 2.25 cubic feet which is what it would take for 3 inches over a square yard (9 sq.ft.) In other words, I thing your numbers are wrong too. :-) Chuck Demas Needham, Mass. Eat Healthy | _ _ | Nothing would be done at all, Stay Fit | @ @ | If a man waited to do it so well, Die Anyway | v | That no one could find fault with it. demas@tiac.net | \___/ | http://www.tiac.net/users/demas