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RULE 2 PERMITS <br />lbs/acre of herbaceous production. According to these production figures, the carrying capacity in <br />AUM's, assuming 1000 pounds of air dry forage per AUM at 50% utilization, would be .39 AUM's <br />per acre. <br />Productivity, as determined by the BIM, is .25 AVM's per acre for the aspen type in this area <br />indicating that the condition of the mountain shrub community within the permit area is good. <br />As previously stated, the deep, loamy soils and high soil moisture conditions together with the <br />generally northern aspect combine to provide the required conditions for the aspen community. <br />Where soil moisture becomes less plant available earlier into the summer, elements of the <br />mountain shrub community begin to dominate. Generally, this occurs due to a change in aspect of <br />the topography or shallower soil depth. <br />For further details on soil/moisture relationships in determining the aspen vegetation community <br />refer to Figure 2.04.10-1, Environmental Gradient/Plant Tolerance Graph. <br />Riparian Communi <br />Within the permit area the riparian community is very limited. The community is confined to areas <br />along Good Spring Creek and Taylor Creek. <br />The community is characterized by a very limited overstory of a few isolated cottonwoods <br />(Populus angustifolia), and boxelder trees (Aver negundo). Understory vegetation includes <br />Wood's rose (Rosa woodsii), willows (Salix spp.), rushes (Juncus spp.), sedges (Carex spp.), and <br />cattails (Typha spp.). <br />The riparian community is found along the drainage bottoms where soil moisture is abundant <br />throughout the growing season. Soil texture ranges from fine clay to coarse, sandy loam soils. <br />Elements of the sagebrush and mountain shrub communities are soon encountered adjacent to the <br />riparian community where plant available moisture begins to decrease. For further details on <br />Soil/Moisture relationships in determining the riparian vegetation community refer to Figure <br />2.04.10-1, Environmental Gradient/Plant Tolerance Graph. <br />Grassland Community <br />Within the permit area, the grassland community covers a very limited area. Small, isolated patches <br />of almost exclusively western wheatgrass growing on heavy clay soils are scattered in the middle <br />elevations of the southern part of the permit area. The community is of such limited extend (+/- 30 <br />acres) that only mention of occurrence is contained here. <br />Rule 2 Permits 2.04.10-5 Revision Date: 7/23/18 <br />Revision No.: TR -123 <br />