Answer:
Humus is decayed organic matter in the topsoil of mature soils. Humus helps the soil to hold water better, by providing nutrients, and by keeping the soil from getting packed down.We do not exactly know if it is living or not.
First answer by KittiesAreHappy. Last edit by BeMe4life. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 4 [recommend question].