U of A University of Arkansas Division of Agriculture

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Agricultural Experiment Station


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Composting
Air and Moisture are Important

The composting process is an aerobic process; decomposition needs air or oxygen to occur. When the compost pile is lacking in oxygen, decomposition slows and odors occur. Add air to the pile by mixing, turning, stirring, fluffing or using air stacks (pipes with holes) in the pile.

Adequate moisture is essential for microbial activity that is responsible for decomposition. A dry compost pile will decompose slowly. Proper moisture encourages the growth of microorganisms that break down the organic matter into humus. If rainfall is limited, water the pile periodically to maintain a steady decomposition rate. Add enough water so the pile is damp but not soggy. A rule of thumb is "about as wet as a wrung out sponge." Avoid over watering. During rainy periods, you may need to cover the pile. Excess water can lead to an anaerobic (lack of oxygen) condition which slows the decomposition process and causes to odors. If the pile should become too wet, turn it to dry it out, or add dry carbon materials to the pile.


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University of Arkansas
Division of Agriculture
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Last Date Modified 01/03/2008
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University of Arkansas • Division of Agriculture
Cooperative Extension Service
2301 South University Avenue
Little Rock, Arkansas 72204 • USA
Phone (501) 671-2000 • Fax (501) 671-2209
 

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