Sources of organic matter include leaves, twigs and other plant residues. A constant replenishment of organic matter is essential to maintain a healthy soil. Bio energy crops can be an important source of organic matter. Husks and press cakes of many non toxic energy crops can be used as a source of origin matter to maintain a constant cycle of replenishment. Soil acidity/alkalinity, moisture content and other factors influence the chemical quality of the soil. The chemical qualities such as the acidity/alkalinity influence the activity of micro organisms and the availability of various essential soil nutrients. Energy crops play an important role in maintaining a good chemical quality by raising the carbon content (by raising the organic content), thereby buffering soil acidity/alkalinity. .
