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Ben Moline; CEC Page 4 of 5 <br />2012; ARR Review <br />January 22, 2014 <br />standard. If the mean cover of 1.00% attributed to cheatgrass is subtracted from the total mean vegetation cover <br />percentage, this would yield 29.60% cover. This total vegetation cover percentage is greater than 90% of the <br />revegetation success standards. Prairie sandreed was the most dominant species encountered making up 50.56% <br />relative cover. Blue grama, sideoats grama and sandbluestem were also dominant plant species. Vegetation litter <br />comprised 51.8% of the ground cover. Bare soil accounted for 17.6% of the ground cover. <br />Total herbaceous production for this area was reported to be 93.2 g /m ^2. This is greater than 90% of the <br />revegetation success standards for herbaceous production calculated by the Division. According to the report <br />100% of the production was attributed to perennial grasses. <br />Six perennial grasses, one annual grass, one succulent species and one woody plant were encountered, totaling <br />nine species. Four warm season species and three cool season species were encountered. Only three warm season <br />perennial grasses met the relative importance criteria to be counted toward species composition success. Zero <br />perennial cool season grasses met the relative importance criteria to be counted. This area did not meet the <br />revegetation success criteria for species composition for 2012. <br />Area 30; 9.68 acres <br />Total mean vegetation cover for Area 30 was 28.8 %. The total mean vegetation cover reported includes <br />cheatgrass a State listed noxious weed that cannot count toward meeting the revegetation success standard. If the <br />mean cover of 2.80% attributed to cheatgrass is subtracted from the total mean vegetation cover percentage, this <br />would yield 26.00% cover. This value does not equal or exceed the revegetation success standard reported for <br />total vegetation cover in the 2012 ARR. Also, it does not equal or exceed 90% of the success standard calculated <br />by the Division. However, the total mean vegetation cover (adjusted for cheatgrass) did pass the "standard null' <br />hypothesis approach to the t -test, which indicates the reclaimed area mean is not less than 90% of the applicable <br />success standard with ninety percent statistical confidence. This test is allowed under Rule 4.15.11(2)(b), <br />however in accordance with this Rule, 15 samples was required to be taken even though statistical sample <br />adequacy was achieved with fewer samples and only 10 samples were taken. Prairie sandreed was the most <br />dominant species encountered in this area, making up 39.52% relative cover. Indian ricegrass (Oryzopis <br />hymenoides), sand bluestem, cheatgrass, sideoats grama, western wheatgrass (Agropyron smithii) and blue grama <br />grass were also dominant species encountered at the site. Vegetative litter comprised 50.6 % ground cover. Bare <br />soil accounted for 20.6% ground cover. <br />Total herbaceous production was reported to be 124.1 9/m ^2. This is greater than 90% of the revegetation <br />success standard for herbaceous production calculated by the Division. According to the report, 99.99% of the <br />production was attributed to perennial grasses. <br />Ten graminoid species were encountered within this area. Eight of the encountered species were native and two <br />were introduced. Eight species were perennial and two were annual species. Six warm season species and four <br />cool season species were encountered. Four warm season perennial grasses met the relative importance criteria to <br />be counted toward species composition success. Two perennial cool season grasses met the relative importance <br />criteria to be counted. This area exceeded the revegetation success criteria for species composition for 2012. <br />Area 31; 11.92 acres <br />Total mean vegetation cover was reported to be 25.8 %. The total mean vegetation cover reported includes <br />cheatgrass a State listed noxious weed that cannot count toward meeting the revegetation success standard. If the <br />mean cover of 5.80% attributed to cheatgrass is subtracted from the total mean vegetation cover percentage, this <br />would yield 20.00% cover. This percentage does not equal or exceed 90% of the reported success standard; nor <br />did it meet or exceed the success standard calculated by the Division. Prairie sandreed was the most dominant <br />species encountered in this area, making up 46.2% relative cover. Cheatgrass, Indian ricegrass, western <br />