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- l01 - <br />' In order to evaluate revegetation success at the Sun- <br />light Mine surrounding undisturbed vegetation will be sam- <br />pled. Since the disturbed area is less than forty acres, <br />this data will be used as the success standard. To obtain <br />' informative information which can be used to define the <br />' baseline conditions for cover, productivity and woody species <br />density, the vegetation must be sampled during the most ap- <br />' propriate segment of the growing season. Sampling which oc- <br />curs during other times of the year will not give meaningful <br />' information, and can lead to underestimating cover, produc- <br />t lion and species composition. Random sampling of the vegeta- <br />lion is required because of the statistical demonstrations <br />' required in the performance standards evaluating revegetation <br />success. By using a random design, an unbiased estimate of <br />' the mean and variance of the vegetation characteristics mea- <br />' sured can be obtained. <br /> The other aspect which must be addressed is the acquisi- <br />' lion of an adequate sample for cover, production and woody spe- <br /> cies density in order to ma ke the required statistical compari- <br />' sons. The Snedecor-Cochren sample adequacy equation (Snedecor <br />' and Cochren, 1967) will be used to demonstrate sample adequacy. <br />The vegetation communities occurring at the site are of the <br />' woody type and therefore enough samples will be taken to detect <br />a ten percent reduction in the mean with eighty percent confidence. <br />' These statistical constraints will be applied to herbaceous cover <br />' and production, and woody species density. <br />LJ <br />