The U.S. Department of Agriculture (USDA) estimated that approximately 770,000 acres of grasslands on the Northern Great Plains were converted to cropland between 1997 and 2007. ?USDA further estimated that, for the same region and period, approximately 100,000 acres were converted from croplands to grasslands, mostly through the Conservation Reserve Program, for a net loss of 670,000 acres of grassland habitat.