Mixing Compost Pile http://www.durgan.org/URL/?UITUF 4 September 2009 Mixing Compost Pile The 5 HP rototiller is used to mix the compost pile periodically. My neighbor adds his grass clippings so the pile is always working.Spent vegetation is put through the chipper/shredder as required.In the first picture note the smoke from the working compost pile.