Term for the decomposition product (therefore also rotting, from rot = rotting, modern, decomposing) of organic substances of mainly plant waste such as grass, leaves, mulch (largely wood waste such as branches, twigs, bark), fruit, straw, peat, pomace and weeds, as well as animal waste in the form of earth-like substance. Animal excreta products such as manure, slurry or stable manure are added (if at all) in already pre-composted form. As a rule, however, these animal waste products are used as fertilisers in their own right. Composting or rotting (rotting) is the controlled decomposition of organic material by microorganisms(algae, bacteria, fungi) and microorganisms (isopods, worms, etc.) with the addition of oxygen. The structural components (such as cellulose, etc.) and constituents (such as sugar) of the plants are decomposed. Some of the intermediate products produced during decomposition are converted into humus. The sometimes alternatively used admixture of rock flour increases the nutrient content.
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