DES MOINES, Iowa (AP) – Federal authorities are forecasting a 2011 Iowa corn harvest of 2.43 billion bushels, a figure that would match the Iowa record set in 2009. The U.S. Department of Agriculture says the estimate is based on Aug. 1 conditions. Last year, 2.15 billion bushels were harvested in Iowa. The area expected to be harvested for grain is up to 13.75 million acres, compared with 13.05 million acres in 2010. The expected yield for 2011 is 177 bushels an acre. That’s 12 bushels higher than last year’s production but 5 bushels under the record set in 2009.