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Total herbaceous production in the BRB -1 in 2012 was 1,052.8 pounds per acre, all of which was allowable. <br />Of this, 421.1 pounds were introduced perennial forbs (mostly alfalfa and Cicer milkvetch planted for <br />nitrogen- fixing activity), 289.1 pounds were introduced perennial cool season grasses, and 246.2 were <br />native perennial cool season grasses. Three other lifeforms were present, each less than 56 pounds per <br />acre. <br />WOODY PLANT DENSITY <br />"Background" Density <br />(Table B -3) <br />Total average "Background" woody plant density in the BRB -1 in 2012 was 643.5 stems per acre. Mountain <br />snowberry was the densest at 348.0 stems per acre followed by big sagebrush with 216.1 stems per acre. <br />Nine other species of shrub were present, each with densities of 30 or fewer stems per acre. <br />Concentration Area Density <br />(Table B- 4) <br />Total average "Concentration Area" woody plant density in the BRB -1 in 2012 was 4,407.1 stems per acre. <br />Big sagebrush was the densest at 2,134.7 live stems per acre followed by mountain snowberry with 1,446.4 <br />stems per acre, Woods rose with 503.0 stems per acre and Saskatoon serviceberry with 151.8 stems per <br />acre. Eight other species of shrub and one species of tree were present, each with densities of 42 or fewer <br />stems per acre. <br />2012 Aspen Reference Area <br />(Photographs 158 through 163) <br />COVER <br />(Table B -5) <br />Native perennial forbs were the predominant lifeform observed in the Aspen Reference Area, contributing <br />33.0 percent all -hit vegetation cover. Native shrubs and trees also contributed heavily with 27.4 and 22.7 <br />percent all -hit vegetation cover respectively - Saskatoon serviceberry contributed 8.1 percent, mountain <br />snowberry contributed 14.5 percent and aspen contributed 22.7 percent all -hit vegetation cover. Native <br />perennial cool season grasses also made a moderate contribution to cover with 12.4 percent. A total of 87 <br />19 <br />