Much of the area supports beef cattle ranching, and dairy farming is common across the area. Dairy farms are usually cooperative affairs, with small farms selling to a corporate wholesaler, who packages product under a common brand for retail sales. Petroleum exploration and extraction also takes place in the Oklahoma portion of the Ozarks, as well as in the east half of the Boston Mountains in Arkansas. Logging of both softwood and hardwood timber species on both private land and in the National Forests has long been an important economic activity.