Jisho

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Noun
1. humus (soil); mold
Wikipedia definition
2. HumusIn soil science, humus refers to any organic matter that has reached a point of stability, where it will break down no further and might, if conditions do not change, remain as it is for centuries, if not millennia. In agriculture, humus is sometimes also used to describe mature compost, or natural compost extracted from a forest or other spontaneous source for use to amend soil. It is also used to describe a topsoil horizon that contains organic matter (humus type, humus form, humus profile).
Read “Humus” on English Wikipedia
Read “腐植土” on Japanese Wikipedia
Read “Humus” on DBpedia

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