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Since critical t = 0.850 (one-tailed, alpha = 0.2, 49 df) and t° is greater than this critical <br />value, reclamation success is demonstrated for background woody plant density in BRB- <br />3.. <br />For BRB-3, the only bond release block area in which any woody plant density standard <br />is actually operable, the woody plant concentration areas were sampled and the average <br />woody plant density value in those concentration areas was 2,867 stems per acre and <br />sample adequacy was achieved with a sample size of slightly over fifty because these <br />are shrub concentration areas where shrubless samples do not occur. <br />Statistical test of the BRB-3 shrub concentration area density values against the <br />standard is not necessary inasmuch as sample adequacy was achieved (Table 16) and <br />the mean (2867 stems per acre) exceeds the standard (1000 stems per acre). <br />The total extent of shrub concentration areas within BRB-3 was 112 ac, or 11.7% of its <br />. area. Hence the standard that there would be at least 5% of the BRB-3 area with at <br />least 1000 stems per acre has been met for 2006. <br />SPECIES DIVERSITY AND COMPOSITION <br />With regard to Mandatory Test A, that no single species comprise greater than 60% <br />relative cover in BRB-3, reference to Table 4 shows that the most abundant single <br />species (intermediate wheatgrass) comprised 17% relative first hit cover, far below the <br />60% threshold of concern. Hence Mandatory Test A) is passed. <br />With regard to Alternative Test B, Total Species Density, the following is calculated for <br />BRB-3: <br />Mountain Brush (MB) reference mean species density (omitting the noxious <br />weeds): 31.5 species per 100 sq.m. <br />mean-1.15`s=31.5-1.15(7.1)=23.3 <br /> <br />25 <br />