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• 2.05.4(2)(e) <br />Sample adequacy requirements for cover data is <br />calculated using the formula; <br />where n~„ = the minimum adequate number of cover transects <br />s' = sample variance (absolute cover) <br />t = a designated t-statistic (two-tailed test with <br />90 percent confidence) <br />d = desired limits of detection (0.1 or 10 percent) <br />x = sample mean (absolute percent cover) <br />Collection and Analysis of Woody Pant Density <br />Data on shrubs is recorded at the randomly located <br />vegetation cover sample sites. Shrub densities are tallied from a <br />50 meter by 1 meter quadrat constructed along the axis of the cover <br />transect. The number of shrubs within the quadrat is determined by <br />species. Individual stems are counted for all shrubs. <br />Sample adequacy for woody plant density is calcu- <br />lated using the formula as presented above (for cover) except that <br />mean density and variance were substituted for mean cover and <br />• variance. <br />Since no woody plant density success standard <br />applies to the site, no future woody stem density sampling is <br />required or planned. <br />Collection and Analysis of Production Data <br />Rectangular plots 1 meter by 1 meter are used for <br />production estimates. The current year's growth of all herbaceous <br />plants is clipped. Herbaceous vegetation is sorted into the <br />following categories; annual grasses, perennial grasses, annual <br />forbs and perennial forbs. Each production plot yields one sample. <br />In the laboratory, clippings are oven-dried at 105°C <br />for 24 hours and is weighed to the nearest tenth of a gram. Data <br />are recorded as grams per square meter (g/m'). The production <br />estimates are also converted to pounds per acre (lbs/Ac). <br />Statistical adequacy requirements for production are <br />calculated using the formula in section 2.9.1, except that mean <br />production and variance were used in place of mean cover and <br />variance. <br />J <br />2.05-27 September 1994 <br />