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• for the sagebrush type is estimated at a low 0.09 AUM's/ac or 12 acres/AUM assuming use of <br />all grasses and the more palatable (orbs. <br />As stated earlier, the sagebrush-2 (SG-2) type represents a remnant native community that has <br />been severely altered because of intensive agricultural land use and associated support <br />activities. Most of the type occurs on toeslopes of a mesa adjacent to the alluvial flood plain of <br />Tuttle Draw. The sites are heavily stocked with cattle at least during part of the year, resulting <br />in a high level of animal pressure from grazing and trampling and winter livestock feeding <br />areas. Consistent with the composition of severely deteriorated native plant communities in the <br />Great Basin and Colorado Plateau regions, cheatgrass predominated the understory while <br />more desirable range species were lacking. Tail water from leaking ditches on the mesa top <br />encroaches this type. Where tailwater is present the site is dominated with an understory of <br />Russian knapweed. <br />The type is not an important component when considering the local land use and management <br />objectives. Conversion to a higher or better use would be done if not for the militating site <br />conditions and associated costs <br />• <br />Deciduous Trees. Approximately seven acres of exotic and deciduous trees have invaded a <br />north facing mesa sideslope that was originally dominated with pinon -juniper on the Martin <br />property. The deciduous tree invasion is due solely to runoff from irrigated lands on the mesa <br />top. Slopes range 30 to 60 percent and soil is shallow to moderately deep. Soils are <br />represented in soil map unit 986. Besides a few remnant pinon (2 percent) and Utah juniper (5 <br />percent), the site is dominate with elm (30 percent), Fremont's cottonwood (15 percent), <br />boxelder (5 percent), Hawthorne (4 percent) and locust (10 percent). The understory has Rosa <br />Nutans, Kentucky bluegrass, clematis, smooth brome, orchard grass, western wheatgrass, <br />along with those species commonly associated with the sagebrush sites. This area will only <br />incur no disturbance. <br />Pinon - Juniaer. A small area of 1 acre of Pinon -Juniper exists on a small area of north <br />facing mesa sideslopes belonging to WFC. The site is dominated with pinon and Utah Juniper <br />and plants commonly found in the sagebrush - 1 site. The understory is comprised of blue <br />(REVISED 9/99) 2.04.10 - 79 <br />