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• determine the sample point location. The field operator paced north (a predetermined direction) a distance indicated by the first random number and rotated 90 degrees to the right and paced the distance indicated by the second random number. The southwest corner of the exclosure was set at the tip of the operator's boot. i The same basic approach was used in reference areas. The southwest corner of the reference area was established. This corner was the origin of the X and Y axes. The operator paced north along the Y axes a random distance and then rotated 90 degrees and paced east parallel to the X axes a random distance. The southwest corner of the exclosure was then established at the tip of the operator's boot. Production. Exclosures for the 1979 growing season and 1980 growing season were erected in April. Exclosures were made in the shape of a pyramid, standing approximately 5 feet high and having • a square base approximately 5 feet on each side. Production data was extracted from a one-half meter rectangular quadrant placed in the center of the exclosure. Production data was obtained in September 1979 and 1980. At the end of the 1979, 1980 growing season (mid July through September) the above ground biomass was clipped. Annual production data obtained by KRC in 1979 included clipping grasses, grasslike plants, forbs, half-shrubs, shrubs and annual forbs. Wyoming Fuel Company's 1980 annual production involved clipping and separating grasses, grasslike plants and forbs (no distinction was made between annual and perennial forbs). Wyoming Fuel Company's 1980 program conforms to current Colorado Regulations in obtaining herbaceous vegetation production only. Vegetation samples were weighed in the field to determine sample adequacy. Samples were taken to Colorado State University where they were dried and weighed. All samples were dried at 105°C -3-