In a message dated 9/12/2005 11:08:45 AM Central Standard Time, gmhyde1@mac.com writes: It should be noted that sawdust, peat moss, and rotting leaves are NOT nitrogen rich. It's the poop & pee that are nitrogen rich. The sawdust dilutes the nitrate and probably achieves a better balance for composting; but in the short run it probably absorbs moisture, slows the fermentation, and to some extent absorbs odors, at least for a while. The deodorizing chemicals available for porta potties probably are way more effective. --Gary Hyde N24 'Sailabration' M17 #637 'Hydeaway2' Most of the nitrogen is in our pee pee. The phosphorous is in the poo. Not much of either in sawdust. It takes lots of sawdust to balance these components out. Steve Tyree backwoods boy