Maintaining production at Chemtex's proposed advanced-biofuel plant Sampson County, N.C., would require up to 30,000 acres of crops, including Arundo donax, which has not been studied extensively, according to Sam Brake, director of farming at the Biofuels Center of North Carolina. So far, Arundo has been cultivated only for landscaping and research purposes, Brake said. Arundo is not expected to multiply uncontrollably because it does not do well in shady forests, and it won't displace food crops because it can be grown in poor soil, Brake said.

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