Worms and slugs in a compost bin

Worms and slugs in a compost bin

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Credit: DAVID PARKER/SCIENCE PHOTO LIBRARY

Caption: Compost is organic matter that has been decomposed and recycled as a fertilizer and soil amendment. Compost is a key ingredient in organic farming. At the simplest level, the process of composting simply requires making a heap of wetted organic matter known as green waste (leaves, food waste) and waiting for the materials to break down into humus after a period of weeks or months. Modern, methodical composting is a multi-step, closely monitored process with measured inputs of water, air, and carbon- and nitrogen-rich materials. The decomposition process is aided by shredding the plant matter, adding water and ensuring proper aeration by regularly turning the mixture. Worms, slugs and fungi further break up the material. Bacteria requiring oxygen to function (aerobic bacteria) and fungi manage the chemical process by converting the inputs into heat, carbon dioxide and ammonium.

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Keywords: aeration, air, ammonium, bacteria, bacterial, cabbage, carbon dioxide, cardboard, carrots, celery, chemical, compost, compost bin, compost heap, composting, corbon, decompose, decomposed, decomposition, fertilizer, food, food waste, fungi, green waste, heat, humus, leaves, nitrogen, nut shells, organic, organic farming, organic matter, oxygen, parsnips, peppers, plant matter, potatoes, recycle, recycling, rot, rotten, rotting, rotting down, slugs, soil, sprouts, tomatoes, walnut shells, water, worms

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