When considering the supply and price of feedstocks, it is necessary to consider how much of each feedstock would be required to produce 40 million gal of ethanol annually, and how much of each feedstock is avail­able throughout the year. It is not necessary that the plant use a single feedstock. In fact, further analysis could be conducted to determine opti­mal combinations of feedstocks based on price, seasonality, and yield. The estimated feedstock requirements and the amount of each feedstock that

should be available in California, given current production levels, are shown in Table 1.

Corn is the only feedstock that would be available in sufficient supply to support production of 40 million gal of ethanol, given current produc­tion levels. The current production of grain corn in California is 920,000 t, while the estimated requirement is for 449,438 t (Table 1). The proportions of supply that would be available for other feedstocks range from 5% for other tree fruit to 25% for raisins. The production, availability, and prices of feedstocks would change with farm-level and industry responses to public policies and market developments that influence the demand for ethanol production.