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.' <br /> <br /> <br /> <br />~' <br /> <br />.. <br />e, <br />CJ <br />UNITED STATES DEPARTMENT OF AGRICULTURE <br />Soil Conservation Service. Colorado <br /> <br />• EXHIBIT "D" <br />Technical Guide RANGE SITE N0. 293 <br />Section II E Field Office l <br />August -19,75 <br />RANGE SITE DESCRIPTION fl <br />for ~i <br />SANDHILLS ~ <br />,I~; ~ • <br />Land Resource Area: Central Desertic BesiAs, Mount~alns <br />and Plateaus (34) ' <br />A. PHYSILAL'CHARACTERISTICS ~; <br />~~. <br />I. Physiographlc Features <br />,. <br />Rolling sandhills from aeolian sands from the Brown's Park <br />sandstone form the topography of this landscape. The site ~, <br />is within an elevat(onal range of 5900 to 6300 feat. ,~ )`{~ <br />/^• ~: I~ <br />' 2. Climatic Features ,. ::~•. <br />The average annual precipitation is 12 to 15 inche! with an .•.E •.•';.. '~' <br />estimated 50$ of the moisture falling as snow. The optimum ' `:~~~ -.. C <br />growing season for native plants is between May IS to July 15,' <br />The average annual temperature is 42° f. <br />F. <br />.i 3• Native (potential) Vegetation i <br />S <br />I.,.. This site is dominated by antelope bitterbrush. Associated <br />"~' with this shrub are big sagebrush, silver sagebrush, gray horse- <br />,~,.. brush, low rabbitbrush and rubber rabbitbrush. Prickly pear. <br />~. -. occurs infrequently. The principal grasses are Indian ricegrass, '. <br />°i~•~-. needle-and-thread, sand dropseed and Sandberg bluegrass. Lon-. <br />splcuous fortis are hairy goldaster, erlogonum, lupine, loco, <br />arrowleaf balsamroot, yarrow, wormwood, death camas, scarlet <br />°i globemallow, cryptantha, evening-primrose and daisy fleabane. <br />Percent ground cover is generally about 25$. ' <br />Plants not a part of the potential plant community that are .most <br />likely to invade when the cover deteriorates er• cheatgrals and , <br />other Introduced annuals, ,. <br />., , <br />;~ ,y--•. <br />i <br />;, <br />,. <br />