Technologies listed in the Compendium are limited to those that use cellulosic agricultural waste biomass. Technologies using exclusively non waste biomass, such as energy crops like poplars, willows, switch grass,
alfalfa, prairie blue stem, corn, soybean oil and others, are excluded from the Compendium. It also leaves out technologies using animal husbandry waste. However, some technologies included in the Compendium utilize a mix of
biomass resources consisting of agricultural residues, energy crops, animal waste and even some inorganic materials such as those found in municipal solid wastes.