__DU scientists estimate a loss of 250,000 aces of CRP could reduce the fall flight by more than 100,000 ducks per year. Compounding the loss of CRP land is the ongoing conversion of native grassland to cropland, estimated at over 200,000 acres annually. Another 3.5 million, or 35 percent of the current CRP acres in the PPR, will expire in 2011-2012. The U.S. Department of Agriculture (USDA) announced that slightly more than 4.3 million acres were enrolled in CRP in August. More than 4.8 million acres were offered nationwide by landowners during this general sign-up.