What feed stocks can be used for ethanol?
A variety of biomass could be feed stock for ethanol. The choice of biomass crop, crop yields, and delivered costs are highly site-specific. For example, some crops do better in sunnier, warmer locations while others flourish in cooler, wetter conditions. Although grasses generally achieve higher dry matter yields per acre per year than do trees, in specific locations (the eucalyptus plantings in Hamakua, for example) the trees out-performed the grasses. This illustrates the importance of using these estimates as a general guide from a statewide perspective rather than as an absolute relationship for all sites.
