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• In all cases, sampling was continued until the minimum sample adequacy requirements were exceeded, <br />or the prescribed maximum number of observations were collected. Maximum sample sizes were <br />developed during the consultation process with OMLR staff and CDMG staff prior to and during the field <br />studies (letter correspondence from Mr. Peter O'Connor to J. Lunan of Peabody dated August 7 and <br />September 3, 1987), (1999 site visits with Dan Matthews and Harry Rainey, and phone conversations <br />with Janet Binns all of the CDMG). <br />Livestock Carrvinct Capacity. Stocking rates were calculated for the irrigated pasture vegetation type <br />only using the results of production samples collected in the type. The rates were based upon the <br />standard 27 pounds/day dry weight intake per animal unit. The rates were expressed as available forage <br />in animal unit months (AUMs). <br />Species Diversity. Qualitative assessments of species diversity (species richness, numbers, and <br />equity) were made on the basis of the cover and frequency data collected in the Irrigated pasture, <br />swaleldrainage, and sagebrush vegetation types. Quantitative methods, including diversity indices and <br />rank correlation tests, were not applied because of the inherent shortcomings associated with these <br />techniques (Chambers 1983). Similarity coefficients were not applied because of the inherent <br />dissimilarity of the plant communities found on the study site, and the fact that a reference area approach <br />• for determining revegetation success at the New Horizon 2 area is not being proposed. <br />Results and Discussion - 1987 <br />Vegetation Distribution and Floristics - 1987. Vegetation types were determined on the basis of plant <br />composition and land use. Six vegetation types were recognized in the New Horizon 2 baseline <br />vegetation studies: sagebrush, Swale/drainage, irrigated pasture, irrigated hayland, irrigated cropland, <br />and miscellaneous types. Farmsteads, facilities (corrals, stockyards, haystacks), orchards, ponds, roads <br />and other (abandoned cropland, abandoned buildings, etc.), were included in the miscellaneous <br />category. The distribution of each type is shown on Map 2.04.10-1. The total acreage of each type in the <br />study area and proposed permit area is shown in Table 2.04.10-4. <br />The plant list resulting from the floristic surveys conducted with the study area is presented in Peabody <br />Appendix 10-1. The list is arranged in alphabetical order by plant morphological class. Species are <br />identified according to scientific name, common name, occurrence in [he various vegetation types, and <br />native or introduced. The list includes 208 species of vascular plants. The morphological classes <br />• (REVISED 8/15/00) 2.04.10 - 22 <br />