There is more to a manure pile than flies. Manure contains residue from wormers and plenty of nitrogen. Picking up stalls daily makes the job easier and reduces the fly problem in your stalls. Hauling your manure away regularly helps to keep the fly population in check. Locate your manure pile away from nearby creeks or streams to prevent nitrogen and other pollutants from harming aquatic species. Place your manure pile on a concrete pad or other impermeable surface so that the nitrogen does not make its way into ground water particularly when shallow wells are located nearby. Another good use for manure is to turn it into composting material.