Reuters: U.S. farmers overwhelmingly said they have benefited from the demand for corn to produce ethanol, with 71 percent of those surveyed saying the renewable fuel has helped boost their bottom line, according to a Reuters poll released on Wednesday. The demand for corn to meet growing consumption by the food and biofuels industries has pushed the price of the grain from about $2 to $3 a bushel, where it was for several years, to an 11-year high of about $5.00 a bushel. David Waide, …