Humus is a vital ring in forest ecosystem chain and has many positive effects in a forest ecosystem. Physically it protects soil surface from erosion and prevents of floods. Chemically plays a basic role in nutrient cycling. In Hyrcanian forest of Iran few studies have been carried out about humus therefore there are many unanswered questions about humus and its relation with the environment in this forests.
We in Forest Ecology team of GAU are about to answer some of these questions.