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Appendix A - Vegetation Sampling for Phase III Bond Release <br />• triple the sampled value on the Rangeland Reference Area (4.01 grams). Thus, the herbaceous production <br />density on the Rangeland Reclaimed Area easily exceeds the 90 percent standard when compared with the <br />Rangeland Reference Area in 2005. Refer to Tables A-12 and A-13 for a summary of the data collected <br />on the Rangeland sampling units with and without the undesirable component, respectively. Tables A-18, <br />A-19, A-20, and A-21 display the results of the 2006 sampling event for production on each plot in each <br />sampling area. <br />Density calculations (lbs/acre) are based on the resulting total "dry" weights. The mean production <br />density for the Irrigated Pasture Reclaimed Area during the year 2005 sampling event, established on the <br />AVF Reference Area, is 2,018 lbs/acre. The sampled production density on the Irrigated Pasture <br />Reclaimed Area is 1,821.9 lbs/acre, or 90.3 percent of the production density sampled on the AVF <br />Reference Area. The estimated production density on the Irrigated Pasture Reclaimed Area exceeds the <br />90 percent standard when compared with the AVF Reference Area. <br />The mean production density standard for the Rangeland Reclaimed Area during the year 2005 sampling <br />event, established on the Rangeland Reference Area, is 356.2 lbs/acre. The estimated production density <br />on the Rangeland Reclaimed Area is 1,177.3 lbs/acre. The estimated production density on the Rangeland <br />Reclaimed Area easily exceeds the 90 percent standard required when compared with the Rangeland <br />Reference Area. <br />A statistical comparison of 2005 dry-weight production data collected on 0.1 square meter plots in the <br />Rangeland Reclaimed Area and the Rangeland Reference Area was conducted after removing the <br />undesirable component. The one-tailed reverse null hypothesis t-test produced the following result with <br />90% confidence when using a sample size of 15: <br />. St 1: SE 89.641 + (0.9 * 1.725)2 <br />? s°` - <br />15 15 <br />SEsat = 2.4773 <br />37.660 <br />Step 2: dfp, = (35.714 + 0.02582) <br />14 14 <br />dfsat =14.752 <br />The t-table value [one-tailed t-test value at the 90% confidence level (0. 1), df= 15] =1.345 <br />13.22 - (0.9 * 4.0056) <br />Step 3: t = <br />2.4773 <br />t = 3.88 <br />Since 3.88 > 1.345, the null hypothesis of the reclaimed area being less than or equal to 90% of the <br />2215_GoldenEagle PH3BOND_2006 3-10-08.doc A-9