U.S. livestock owners grazed their herds on 817 million acres in 1982, down about 20 percent from 1950. This drop resulted primarily from improved productivity of grazing lands, as animal units of cattle and sheep increased more than 30 percent during 1950-82. Only the Southern Plains, of all farm production regions, showed an increase in land grazed during 1950-82. Non-Federal grazing land consisted of rangeland (67 percent), pastureland (21 percent), and grazed forest (12 percent). More than 30 percent of the non-Federal range and pasture was rated in good to excellent condition, and 12 percent of the grazed forest had very high or high forage value. This report examines grazing trends, demands, resources, and conditions of resources through 1982.
Daugherty, Arthur B. and United States Department of Agriculture, Economic Research Service, "U.S. Grazing Lands: 1950-8" (1989). All U.S. Government Documents (Utah Regional Depository). Paper 117.