Unlike many 'bargain' manures that contain filler material, Back to Nature, Inc.��Composted Cattle Manure is 100% fully composted manures. They have been aerobically composted at temperatures approaching 160��F for over four months. Low in moisture content and salts, Back to Nature��Composted Cattle Manure is virtually odor free. While cattle manure is a natural fertilizer, it is also an important food source for beneficial soil organisms. These organisms help make nutrients available to plants, aerate the soil, and help to keep harmful organisms and pathogens in check.