noun
- dark organic material in soil formed by the decomposition of plant and animal matter
Examples
- The rich humus in the forest floor provides nutrients for new plant growth.
- Gardeners often add humus to improve soil quality.
- Earthworms help create humus by breaking down dead leaves.
- The dark humus layer was clearly visible in the soil sample.
- Plants grow better in soil with plenty of humus.
- Fallen logs slowly decompose into humus over many years.