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e, <br />• T. ~ `. <br />UNITED STATES DEPARTMENT OF AGRICULTURE ' <br />Soil Conservation Service, Colorado - - <br /> Technical Guide RANGE SITE N0. 238. , <br /> Section II E Field.Office <br /> August 1475 <br /> RANGE SITE DESCRIPTIDN <br /> for ... - .- . <br /> °RU.SITY LOAM <br />- Land Resource Area: Southern Rocky Mountains (48) <br />'. A. PHYSICAL CHARACTERISTICS <br /> 1. Physiographic Features <br /> This site occupies on gently rolling to steep upland slopes. _ <br /> Degree of slope ranges from 3 to 65$• Direction of slope - <br />_'~;'`:. ranges from north and east to south and west as the elevation "~~'-;_=_ <br />"' <br />'`~ increases. Elevation ranges from 6000 feet to 9000 fee[ above - <br />, <br />_ <br />-~ sea level. ~ <br />„- <br />~- <br />. '_ <br />~. ,.. ~.wi ~- • <br />- ~:.~ <br />2. Climatic Features - .~`~-. <br /> ' Annual precipitation ranges from 15 to 20 inches. At Least Half ;~.'?='~y: ^;,". <br />- - of the annual precipitation is in the form of snow. Optimum - ,.•::;•~.; <br />. <br />~;: ~ -. growing season for native plants is mid-May to mid-July. .Winters'': <br />.::'.: <br /> are typically cold. Range forage plants are favored by spring 'b <br /> moisture from accumula.[ed snow. June and July are. usually [he ~;,~; <br />- 5yk~~ <br />!:. <br /> <br />'- <br />~ r <br />. <br />dry months during the growing period. ;., ,;"+-~ ~•. <br />° <br />i <br />: . <br />l``: <br />~ ~ <br />~ <br />.. <br />~:~ . <br />. <br />.. <br />a <br />.4 <br />. <br />~ <br />e ~~~ -~~ ~ ~. Nc~iVc (j~0ielnCicl) Vegetation ~ ~~~~~~ ~ ~~~,;~ ~' r~x, <br /> <br /> The aspect of this site is a shrub dominated community. Service='""- :-~~ <br /> ;,.., > <br />berry and oakbrush are the major brush species. Snowberry, choke-.,~_',. <br />-a•, <br />- <br />- , <br />. <br />cherry, and rose are the other principal shrub species. About ,..,;>~`•,;°::-; ' <br /> <br />~ 50 to 60 percent of the annual production is made up of grasses. - <br />• <br />- <br />. Nodding biome, mountain biome, slender wheat, western wheat, and.. <br />.. <br />,., ,.v- . <br />-' .... <br />Letterman and Columbia needlegrasses are the major grass species' :.,. <br />' on this site. Elk sedge, generally, is the most frequently . <br />'~ : <br /> <br />'. _ i <br />, <br />occurring plant. Major forb species include aspen peavine, flea- _ <br />` bane, western yarrow, American vetch, and lupine. Additional plants <br /> present on this site include oniongrass, big sagebrush, geranium, <br /> and low larkspur. <br /> This site is generally treeless, except for possibly a few scattered <br /> aspen, which have little or no market value. Optimum ground cover <br /> <br />