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llli5/399 .5: 3Z 7198450525 IPA -JAU FaCiE Da <br />n{ e-.. • • <br />_,.• <br />USDA, Soil Conservation Service <br />Section II-E <br />'~` 1 UNITED STATES DEPARTMENT OF AGRICULTUEE <br />SOIL CON9ERYATION SERVICE <br />. COLORADO FIELD OPFICE <br />Limestone Breaks USB <br />ECO Sire Description <br />MLItA fi9A, 69B <br />April ].983 <br />A. PHYSICAL CHARACTERISTICS '.~°•; y,. <br />~~ .1. Physio~raphic Fentutes <br />This site ie located on rolling hills, ridges, escarpments and other <br />limestone slopes ranging fram moderate to bSx slopes, Tile site <br />.occurs an all exposures. Elevation ranges from 4,OOD to 6,200 feet <br />(1,:00 to 1,$16 meters). This site generally occurs baiow 5,000 <br />feat (1,523 meters). <br />2. Climatic Features . <br />a. The climate is semi arid. Winters are cold, normally open with <br />perio2ic snow accumulation a~ melting. North fecina sites may <br />in some wi¢tera have snow cover all winter long. This variation <br />f` ~ in exposure, winter precipitation, accumulation and soil <br />t temperature can accaunt !or differing vegetation quantities and <br />makeup. Summers nre normally hot and dry with high intensity <br />thunder storms. The annual precipitation raagas from 11.72 to <br />12.0 ir.chea (25 to 35 em), of which 70 to 75X falls during May - <br />occober period. High evapatranspiratiov looses limit <br />effectivaneea of the suwmer moisture. <br />A typical average precipitation pattecn is ae Iollowa: <br />Jac FeS March April ?fay June Julq Aug Sept oct Nov Dec <br />.4 .4 .7 1.2 1.8 1.4 2.0 1.7 .9 .8 .S .3 <br />b. Plant growth csa begin any time from April 1 Co May 1. Hired <br />gresaes (mid and ahorC) dominate the Bite, The sire ie <br />predominately warm aeasoa grasses. Optimum growth peziod is <br />during April 25 through October 10. Frost free period is <br />normally from 150-).70 days. The last frost generally occurs in <br />she last week of April and the First frost occurs she first week <br />of October, There are 7! days Chat the temperature exceeds 90' <br />F. and 150 days that the temperatures are below 32° P. <br />3. Native (Climax Potential) Vegetation <br />a. The OLant r~mmuaity Ss a mix of greeaca, forbe and shrubs vlth <br />scattered one seed dunipere often present. Greases account for <br />$0 to 95z, and forSa 10 to 15:, shrubs and trees 10 to 15X of <br /> <br />