Does topsoil have a higher humus content than subsoil?
[1] Topsoil has a higher humus content than subsoil. It tends to be the layer of the soil food web where above and below ground organisms such as bacteria, beetles, and earthworms live and die. [2] The death and the resulting decay of these organisms contribute to the build-up of organic matter. [3] Another word for humus is organic material.
