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Definition

Humus

Humus is a dark, crumbly organic substance formed through the controlled decomposition of food scraps and yard waste by microbes, fungi, and small invertebrates.

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Updated 2026-10-06

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Prep Sessions

Home Composting Fundamentals for Backyard Gardeners @ University of Michigan - Ann Arbor

Ch.1 Biological Foundations - Home Composting Fundamentals for Backyard Gardeners @ University of Michigan - Ann Arbor

Fundamentals of Biological Decomposition - Home Composting Fundamentals for Backyard Gardeners @ University of Michigan - Ann Arbor