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What is Compost?
What is Compost?

Compost is an enhanced soil conditioner created by the microbial decomposition of organic material. Manures, animal bedding, leaves, spoiled hay, and grass clippings are common raw materials used by both backyard and farm compost producers. 

The process of active composting, where high carbon and high nitrogen materials are blended and frequently turned, dramatically accelerates the rate of decomposition of these materials. The microbes which feed on these materials multiply in vast numbers when proper  moisture (50% to 70% moisture content) and ample oxygen are available. These aerobic (oxygen dependent) microbes include different communities of bacteria, actinomycetes (filamentous bacteria) and fungi which become active at different temperature thresholds.

Compost begins to heat up as microbes operating at lower temperatures become active.

Compost has a dark earthy look when completed
Finished Compost

While feeding on the raw materials their numerous bodies give off a small amount of heat which slowly raises the temperature of the pile or windrow. Thermophilic (high temperature) bacteria, actinomycetes and fungi begin to operate when the compost pile or windrow reaches about 100 deg F. Then the fun begins. These microbes are extremely active and increase to very large numbers with the right conditions: proper food, temperature, moisture and oxygen. Compost piles and windrows can easily reach 140 to 150 deg F when these critters are hard at work. Temperatures at or above 132 deg F for three days effectively kill weed seeds and pathogens.

When compost is finished after many months and repeated turnings (which mix materials and add oxygen), the temperature has significantly decreased and the finished product is dark and rich looking, has an earthy smell and is loaded with many nutrients, as well as huge numbers of beneficial microorganisms. Major nutrients include nitrogen, phosphorous, potassium, magnesium, etc., the primary building blocks of plant growth. Micro nutrients include boron, manganese, zinc, copper and iron, which are needed in small doses for certain plants. Soils and plants thrive with the proper treatment of well-made compost.

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