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Source: USDA news release

Dedicated energy crops, such as switchgrass, are potential renewable feedstocks for liquid fuels or electricity generation.

However, markets do not presently exist for large-scale use of this resource.

Switchgrass is a perennial grass native to most of North America that grows well on rain-fed marginal land.

It has the greatest growth potential in regions where it has a comparative yield advantage relative to other crops.

An ERS study simulated the impact on farmland use from growing enough switchgrass to generate 250 TWh of electricity annually by 2030, an amount approximately equal to present U.S. hydroelectricity generation.

The study found that such a significant increase in demand for switchgrass would entail shifting land from other crops to switchgrass, and that these effects would vary regionally.

In the Appalachian region, for example, the crop most affected is hay, with smaller reductions in corn and soybeans.

In the Southeast and Northern Plains, acreage reductions are shared among the crops more uniformly.

In total, about 29 million acres of switchgrass may be grown annually in the United States under this scenario, representing 8 percent of cropland.

This chart appears in the ERS report Dedicated Energy Crops and Competition for Agricultural Land, released December 2016.

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