What is partially decomposed organic material?

Partially decomposed organic material, often referred to as detritus or humus, consists of plant and animal matter that has begun to break down through microbial activity and environmental factors but is not yet fully decomposed. This material plays a crucial role in soil health by contributing nutrients and improving soil structure. It serves as a habitat for various microorganisms and invertebrates, which further aid in the decomposition process. In ecosystems, this organic matter is essential for nutrient cycling and supporting plant growth.