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. averaged 6.5, 18.1, 27.1 and 1.3 percent, respectively. Average species density was 22.9 <br />species per 100 sq. m. <br />PRODUCTION <br />(Table 5) <br />Total herbaceous production in 2006 was 1,424.1 pounds per acre. Of this, 797 pounds were <br />Introduced perennial cool season grasses, 342 were introduced perennial fortis, and 219 were <br />native perennial cool season grasses. Four other lifeforms were present with a combined <br />contribution of less than 100 pounds per acre. <br />WOODY PLANT DENSITY -BACKGROUND <br />(Table 6) <br />Total average background woody plant density in 2006 Bond Release Block 3 was 1833 stems <br />per acre. Big sagebrush (Seriphidium fridentatum) was the densest at 1502 stems per acre. <br />Mountain snowberry contributed 151 stems per acre to the total. Six other species of shrub were <br />present, each with densities of fewer than 100 stems per acre. Because of the extremely <br />. heterogeneous nature of the presence of shrubs across the BRB-3 landscape, with shrubless <br />areas commonly encountered in addition to areas with dense shrub presence, achievement of <br />statistical adequacy for the "background" sampling of shrub density is virtually impossible. <br />WOODY PLANT DENSITY-CONCENTRATION AREAS <br />(Table 7) <br />For BRB-3, the only bond release block area in which any woody plant density standard is <br />actually operable, the woody plant concentration areas were sampled and the average woody <br />plant density value in those concentration areas was 2,867 stems per acre and sample adequacy <br />was achieved with a sample size of slightly over fifty because these are shrub concentration <br />areas where shrubless samples do not occur. <br />Phase 2 (ll) Bond Release Area (BRB-4rev) <br />(Photographs 41 through 64) <br />• 16 <br />