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<br />~~ <br />Total vegetative cover was sampled using an optical point <br />frame developed by Esco Associates. Point sitings were <br />t located along a 50 meter transect stretched out from the <br />sample point location. The 50 points per transect (one point <br />at each one meter interval) comprise a single sample unit. <br />Cover was identified by life form, or as rock, litter, or bare <br />ground. Life form categories included perennial grasses, <br />' annual grasses, perennial forbs, annual forbs, shrubs, and <br />noxious weeds. For the purposes of estimating cover, only <br />first hit data were collected. <br />1 <br />RESULTS --------------------------------------------------- <br />SAMPLE ADEQUACY CALCULATIONS <br />Sample adequacy calculations were carried out for total <br />' herbaceous cover and are included in Table 6. The <br />Snedecor-Cochran sample size adequacy formula (listed on page <br />' 15 of the Division's "Guidelines for Compliance with Land Use <br />' and Vegetation Requirements of the Colorado Mined Land <br />Reclamation Board for Coal Mining, October, 1988") was used. <br />Each of the three main reclaimed areas were sampled to <br />adequacy. In the refuse area, 12 transects were sampled. The <br />' sample adequacy calculation (SAC) from these transects <br />resulted in a value of 11.0 (at a 90 ~ statistical confidence <br />1 level). The Number 1 Mine and Number 3 Mine reclaimed areas <br />2 <br /> <br /> <br />