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r ; <br />... j, •.,!yl~J~7k; <br />~. ~; ~.t,ycr4~,., : , ..: <br />.. ~ ... . '. \j 't <br />~~°UNITED STATES DEPARTMENT OF AGRICULTURE ~~.~.; <br />.~•~" Soll Conservation Service, Colorado ! 64r.';!'r '" ft1~"'J'~1'~ <br />Technical Guide RANGE SITE N0. 231 <br />Section II E Field Office <br />August 1975 <br />-. RANGE SITE DESCRIPTION <br />;'~ <br />for .::; <br />bRY MOUNTAIN LOAM <br />Land Resource Area: Southern Rocky Mountains (48) <br />A. PHYSICAL CHARACTERISTICS <br />1. Physiographic Features <br />Topography is gently sloping to-steep hilly lands. Slope is <br />usually less than 25$. Elevation ranges from 7500 feet to 8500 <br />feet.. <br />i" <br />2. Climatic Features <br />Average annual precipitation is 12 to 14 inches with 50$ or more <br />of the moisture received as 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 ranges <br />from the 70°s to (-) 40°s. Mean annual temperature is less than <br />40 degrees F. <br />Associated with this site are areas limited In plant growth condi- <br />tions because of exposure and wind. ~ ~- <br />3. Native (potential) Vegetation <br /> <br />Bluebunch wheatgrass, sheep fescue, pine needlegrass, needle-and- <br />thread, June grass, streambank wheatgrass, squirreltail, Nevada <br />bluegrass, mutton grass and sedges contribute toward a rather <br />sparse grassland appearance. Sagebrush has a noticeable place on <br />this site. Low rabbitbrush, snowberry, serviceberry, and bitter- . <br />brush may be present'in small amounts. Low phlox;' pussytoes, buck- <br />wheat, stonecrop and fringed sage are common. ~.~~•• ~= <br />iv <br />Optimum ground cover is ~$. The following species are most likely <br />to invade this site: pall- rabbitbrush. ~ ;,}., <br />~~ <br />~_ <br />~t'~~ <br />,~;'~F` <br />S„ <br />.. ',a~',s~;... ,' <br />~_ <br />