Humus consists of

1. decomposing organic material
2. all of the organisms inhabiting the soil
3. mostly water and inorganic nutrients
4. anions and cations found in the soil
5. strictly soil microbes

Humus is a dark organic matter that is an important part of your soil
Humus consists of decomposing organic material. The process of creating humus is called Humification: decomposition of organic matter into smaller and smaller molecules by the micro-organisms in the soil (mostly bacteria and fungi).

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