The Energy Independence and Security Act (EISA) of 2007 established specific targets for the production of biofuel in the U.S. Meeting these targets will increase demand for traditional ag. commodities used to produce ethanol, resulting in land-use, production, and price changes in the farm sector. This report summarizes the estimated effects of meeting the EISA targets for 2015 on regional ag. production and the environment. Meeting EISA targets for ethanol production will expand U.S. cropped acreage by 5 million acres by 2015, an increase of 1.6% over what would otherwise be expected. Much of the growth comes from corn acreage, which increases by 3.5% over baseline projections. Water quality and soil carbon will also be affected.

A large expansion in ethanol production is underway in the United States. Cellulosic sources of feedstocks for ethanol production hold some promise for the future, but the primary feedstock in the United States currently is corn. Market adjustments to this increased demand extend well beyond the corn sector to supply and demand for othercrops, such as soybeans and cotton, as well as to the livestock industries. USDA¿s long-term projections, augmented by farmers¿ planting intentions for 2007, are used to illustrate anticipated changes in the agricultural sector. Graphs.

The Energy Independence and Security Act (EISA) of 2007 established specific targets for the production of biofuel in the United States. Until advanced technologies become commercially viable, meeting these targets will increase demand for traditional agricultural commodities used to produce ethanol, resulting in land-use, production, and price changes throughout the farm sector. This report summarizes the estimated effects of meeting the EISA targets for 2015 on regional agricultural production and the environment. Meeting EISA targets for ethanol production is estimated to expand U.S. cropped acreage by nearly 5 million acres by 2015, an increase of 1.6 percent over what would otherwise be expected. Much of the growth comes from corn acreage, which increases by 3.5 percent over baseline projections. Water quality and soil carbon will also be affected, in some cases by greater percentages than suggested by changes in the amount of cropped land. The economic and environmental implications of displacing a portion of corn ethanol production with ethanol produced from crop residues are also estimated.

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National interests in greater energy independence, concurrent with favorable market forces, have driven increased production of corn-based ethanol in the United States and research into the next generation of biofuels. The trend is changing the national agricultural landscape and has raised concerns about potential impacts on the nation's water resources. To help illuminate these issues, the National Research Council held a colloquium on July 12, 2007 in Washington, DC. Water Implications of Biofuels Production in the United States, based in part on discussions at the colloquium, concludes that if projected future increases in use of corn for ethanol production do occur, the increase in harm to water quality could be considerable from the increases in fertilizer use, pesticide use, and soil erosion associated with growing crops such as corn. Water supply problems could also develop, both from the water needed to grow biofuels crops and water used at ethanol processing plants, especially in regions where water supplies are already overdrawn. The production of "cellulosic ethanol," derived from fibrous material such as wheat straw, native grasses, and forest trimmings is expected to have less water quality impact but cannot yet be produced on a commerical scale. To move toward a goal of reducing water impacts of biofuels, a policy bridge will likely be needed to encourage growth of new technologies, best agricultural practies, and the development of traditional and cellulosic crops that require less water and fertilizer and are optimized for fuel production.