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• Appendix (for cover, see Ta61e 18; for production, see Table 21; <br />for woody plant density, see Table 24). The Snedecor-Cochran <br />sample site adequacy formula was used that is listed on page 15 of <br />the Division's "Guidelines for Compliance with Land Use and <br />Vegetation Requirements of the Colorado Mined Land Reclamation <br />Board for Coal Mining, October, 1988" <br />All five areas were sampled to adequacy for cover. Table 18 <br />lists the sample adequacy number calculated for each of the five <br />areas. In each case, the number of samples collected was greater <br />than the calculated sample adequacy number. <br />Only the native grassland community and its reference area <br />were sampled to adequacy during production sampling. Fifty <br />samples, the maximum required by CMLRD, were collected in the <br />• sagebrush rangeland community, the sagebrush rangeland reference <br />area, and the juniper-pinyon woodland community. <br />Table 24 indicates that, with regard to woody stem density, <br />the maximum number of samples (50 for baseline only; 35 for <br />reference areas) was collected in four of the five areas. This was <br />most likely due either to the patchiness of the sampled unit (e.g. <br />juniper-pinyon woodland, sagebrush rangeland community) or to the <br />nature of the sample adequacy formula. The native grassland <br />community and reference area are an example of the latter effect. <br />While the range of woody stem values was relatively low (0 - 17) <br />and fairly consistent, the variance was large in comparison with <br />the mean. Thus, the sample adequacy calculations for the grassland <br />- 14 - <br />r 1 <br />L J <br />