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vegetation cover or total herbaceous production. A statistical analysis is not required for the <br />evaluation of species composition. <br />Should a statistical analysis be required to determine revegetation success, a Student's t test <br />will be employed. The Student's t test is a robust statistical test to evaluate the equivalency of <br />two sample means (Zar, 1974). This test will be employed to test the null hypothesis that the <br />sample mean for reclaimed area parameter is equal to or greater than 90 percent of the value <br />of the corresponding reference area mean or success standard. Standard statistical <br />probability ranges will be employed in the determination of whether the reclaimed area mean <br />is significantly less than the criterion. When the reclaimed area mean is not statistically <br />significantly less than the reference area mean or criterion, the revegetation will have been <br />demonstrated successful. <br />2.9.7.5 SPECIES IDENTIFICATION AND VERIFICATION <br />Species identification will be accomplished in the field through the use of plant identification <br />keys (e.g. Harrington, 1954, Weber, 1990; Whitson, 1987; Zimdahl, 1990, Stubbendieck, et al, <br />1995). In cases where plant identification was inconclusive in the field, voucher specimens <br />will be pressed for later lab identification. <br />2.9.8 METHOD FOR SAMPLING POST-SMCRA, INDUSTRIAL/COMMERCIAL <br />RECLAIMED AREAS (CATEGORY H) <br />In post-SMCRA reclaimed areas that have and industrial/commercial post -mining land use, <br />no revegetation sampling to determine reclamation success will be necessary as these areas <br />will not be revegetated per the surface landowner's request. <br />TR -77 H-22 Revised March 2019 <br />