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• 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 />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 top. <br />Slopes range 30 to 60 percent and soil is shallow to moderately deep. Soils are represented in soil <br />map unit 986. Besides a few remnant pinon (2 percent) and Utah juniper (5 percent), the site is <br />dominate with elm (30 percent), Fremont's cottonwood (15 percent), boxelder (5 percent), <br />Hawthorne (4 percent) and locust (10 percent). The understory has Rosa Nutans, Kentucky <br />bluegrass, clematis, smooth brome, orchard grass, western wheatgrass, along with those species <br />commonly associated with the sagebrush sites. This area will only incur no disturbance. <br />Pinon - Juniaer. A small area of 1 acre of Pinon -Juniper exists on a small area of north facing <br />mesa sideslopes belonging to WFC. The site is dominated with pinon and Utah Juniper and plants <br />commonly found in the sagebrush - 1 site. The understory is comprised of blue grams, galleta, <br />• bottlebrush squirreltail, snakeweed, four-wing saltbrush, cheatgrass, and rubber rabbit brush. This <br />area will incur no disturbance. <br />Flood Plain. The bottom of Tuttle draw has a flood plain that varies in width from 20 meters to <br />100 meters. The flood plain is comprised of two parts, the channel bank which is 1 to 3 meters in <br />width and the alluvial terrace which is 20 to 100 meters wide. Soil map unit 98A is representative <br />of the alluvial terrace soil. The flood plain type resides wholly outside the area of disturbance. <br />Channel bank. The channel bank is directly adjacent to the Tuttle Draw water surface. It is <br />continually saturated with water and supports a variety of native and introduced hydrophytic <br />graminoids and fortis. Closest to the stream, the bank is lined with scirpus (Scirpus americans). <br />Intermingled and moving away from the bank, are rushes and sedges (typically Carex <br />nebrascensis and Carex occidentalis) along with horsetail (Equisetum kansanum), salt grass <br />(Disticlis stricta) and alkali sacatone (Muhlenbergia asperfolia). In some areas coyote willow <br />(Salix exigua) and saltcedar (Tamarisk sp.) predominate. The channel also has a few cottonwoods <br />(Populus fremontii and Populus longifolia) and Russian olive. Intoduced species have also <br />• (REVISED 8175!00) 2.04.10 - 71 <br />