Botany - Ecosystem Question with Solution | TestHub

On partial decomposition of the dead organic content forms a dark coloured amorphous substance called humus and the process of its formation is called humification. Humus is rich is lignin and cellulose and is the organic component of the soil. It is a colloid and found to be resistant to microbial action. Humus helps in maintaining soil moisture and aeration. Also, it is a reservoir of nutrients which are released slowly as the decomposition process. Humus can further be broken down to release inorganic content by mineralization.