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:.r.. -.. <br />~~ ~;'? <br />~~ <br /> <br />.• <br />,..,... ~ <br />r. <br />.,. <br />UNITED STATES DEPARTHENT OF AGRICULTURE <br />Soil Conservation Service, Colorado <br />Technical Guide RANGE SITE N0. 231 <br />Section II E Field Office <br />August 1975 <br />RANGE SITE DESCRIPTION <br />Land Resource Area <br />A. PHYSICAL CHARACTERISTICS <br />:..tor <br />bRY MOUNTAIN LOAH <br />SoJthern jtocky Mountains (48) <br />1. Physiographlc Features <br />• Topography is gently sloping to steep hilly (ands. Slope is <br />-. usually less than 25$. Elevation ranges from 7500 feet to 8500 <br />feet. <br />2. Climatic Features <br />Average annual precipitation is 12 to 14 inches with 50$ or more <br />of the moisture received a's snow. <br />Optimum growing season for native plants Is May 15 to July 1. The <br />frost-free period ranges from 30 to 100 days. Temperature ranycs <br />from the 70°s to (-) 40°s. Mean annual temperature is less than <br />40 degrees F. <br />:, <br />Associated with this site are areas •limited in plant growth condl- <br />Lions because of exposure and wind. <br />3. Native (potential) Vegetation <br />~. <br />Bluebunch wheatgrass, sheep fescue, pine need legrass, needle-and- <br />'- thread, June grass, streambank wheatgrass, squirrel tail, Nevada <br />bluegrass, mutton grass anb sedges contribute toward a rather <br />sparse grassland appearance. Sagebrush has a noticeable place on <br />_ this site. Low rabbitbrush, snowberry, servtceberry, and bitter- <br />. brush may be present In small amounts. Low phlox, pussy toes, buck- <br />, wheat, stonecrop and fringed sage are common. <br />- Optimum ground cover is 35$. The following species are most likely <br />~~';• to invade this site: Tali rabbitbrush. <br />~. ;. <br />;.:. <br />,. <br />.y-.. ~ 3 <br />i •' ' <br />.~* l~a'.. , . .i <br />