Laserfiche WebLink
Four plant life forms were encountered in the cover sampling of this site. Native shrub and <br />subshrubs were the dominant plant life form encountered on this site, contributing 8.00 percent <br />of the total plant cover and 48.81 percent of the total relative cover found on this site. Perennial <br />forbs were the second most dominant plant life form, contributing 5.00 percent of the total plant <br />cover and 30.51 percent of the total relative cover found on this site. Perennial grasses <br />contributed 2.78 percent of the total plant cover and 16.95 percent of the total relative cover <br />found on this area. Annuals and biennials contributed 0.56 percent of the total plant cover and <br />3.39 percent of the total relative cover and Noxious Weeds contributed 0.06 percent of the total <br />plant cover and 0.34 percent of the total relative cover on this site. <br />Brome Snakeweed, a native subshrub was the dominant plant species encountered, contributing <br />40.07 percent of the total relative plant cover found on this site. The other dominant plants <br />encountered were: Common Globemallow, Russian Wildrye, Fourwing Saltbush and Basin Big <br />Sagebrush contributed 29.83, 16.95, 7.12 and 4.75 percent, respectively, of the total relative <br />cover on this area. <br />The locations of the 18 cover transects sampled in the Dryland Pasture Reference Area are <br />shown on Map 2.04.10 -4, Dryland Pasture Reference Area. The sample adequacy calculations in <br />Appendix Table 2.04.10 -2, New Horizon North Mine Area - Sample Adequacy Calculations, <br />document that the number of samples required to describe this site at the 90 percent confidence <br />interval was 10.2 transects. <br />Production. The results obtained from the sampling of 50 production transects on this area are <br />summarized in Appendix Table 2.04.25, Dryland Pasture Reference Area - Production. This <br />table shows that the average total herbaceous forage production on this site equaled 8.40 g/1 /4 <br />m or 299.4 pounds of air dry forage per acre. Perennial grasses and grasslikes contributed 3.02 <br />g/1 /4 m or 35.95 percent of the herbaceous forage produced on this area. Perennial forbs, <br />contributed 75.38 g/1 /4 m or 64.05 percent of the herbaceous forage production on this area. <br />The locations of the 50 production transects sampled for this site are shown on Map 2.04.10 -4, <br />Dryland Pasture Reference Area. The sample adequacy calculations in Appendix Table 2.04.10- <br />2, New Horizon North Mine Area - Sample Adequacy Calculations, document that the number of <br />samples required to describe this site at the 90 percent confidence interval was 83.5 transects. <br />Shrub Density. The shrub density counts obtained from the 15 belt transects sampled in this <br />area are summarized in Appendix Table 2.04.10 -26, Dryland Pasture Reference Area - Shrub <br />Density. The average shrub density was determined to equal 24.33 shrubs per one hundred <br />square meters or 984.6 shrubs per acre. The only woody species encountered in the shrub <br />sampling of this site were Fourwing Saltbush and Basin Big Sagebrush. <br />According to the sample adequacy calculations in Appendix Table 2.04.10 -2, New Horizon <br />North Mine Area - Sample Adequacy Calculations, document that the number of samples <br />Section 2.04.10 Page 24 November 2011 <br />