Biomass is derived from plant or plant based material, which is not used for feeding purpose but used as energy source. That can either be used directly via combustion to produce heat, or indirectly after converting it to various forms of biofuel. Few examples for biomass are scrap lumber, forest debris, certain crops, manure, and some types of waste materials.
Related Journals of Biomass
Biomass & Bioenergy, Biomass, Bioenergy journals, Biomass Conversion and Biorefinery, American Journal of Biomass and Bioenergy