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Humus

From Biology-Online Dictionary | Biology-Online Dictionary
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Humus

(Science: ecology) The part of dirt or soil which comes from organic matter, such as from dead and decaying plants and animal remains. Partially decomposed organic matter; the organic component of soil.Humus improves the fertility of soil because it is derived from biological material from dead organisms, therefore possesses many of the building blocks of life that can be harnessed by other living organisms such as plants locally occupying the soil.