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<br />• <br />:~ <br />• <br />~- <br />~. <br />• <br />~, <br />UNITED STATES OEPARTriENT OF AGRICULTURE •' ''••. <br />Soil Conservation Service, Colorado ~~"""~~.•' " <br />Technical Guide RANGE SITE N0. 287 •;:~•. <br />Section II E ~ :Fi.eld'O.fflce <br />August t975~~ <br />RANGE SITE DESCRIPTION <br />'1,..:• <br />STONY FOOTHILLS. •r ao~-+~.i1..~ %• ~~, ~ . <br />_ ~ ~~,`` ;. <br />• • .land Resource ~A~ea: Centfal Oesertlc'•Basins,~'Mduntai'ns,' "' ~'~ *~n: <br />_ ,~: .,.e <br />and Plateaus.134) . : ' ..::.:.... . :.: :' . :. ~~.~ <br />- ~•~ ' • • Southern Rock Mountains °(48 `""'~'• -,,. i <br />A. PHYSICAL CHARACTERISTICS •~ ~~~ ~ .. ~•.. •,-';_~T~.~",•-~ ~`' ~~ <br />. - • 1 '~ ~L <br />.j. 7hysiograph~ Features - ~ -_ - ,i <br />Rough rocky breaks.jn foothills and mesa country•on steep slopes, •~ ~ <br />generally between-l 5-to 65$;.•At_higher elevatlons.the ilte, '., ~ .~, <br />occupies-south and.~west exposures.=:•At lgwer elevations::it occurs i; <br />• on rursh and: ease 'exposures.. . Elevation ranges from 5500 •to--7500,:" - ~ ii <br />feet above sea"level. ti <br />1 <br />"2. Climatic Features ~~ <br />' ~.~, <br />Annual precipitation averaees from 12-to 13 inches.. 51-ightly'more .• <br />.. '.than half of the moisture.falls between April•1. and Septanber30- <br />'" Nonths_receiving•thghighest.:~recipi2a.tian_are July, August~_and -' <br />September.- -Growing-season-extends from Apr[1•th~ough the end. of- ' <br />September. - - - _~• .. <br />• ..,~: <br />June is usually the most drouthy month. tool season grasses are . <br />.~..:fevored and make their best growth following the spring•'thaw~(about <br />April) when available moisture.is'greatest. .shese plants-again .Lake <br />_ advantage of•latq summer moisture if they are~in.healthy.conditlon. <br />- - .' ... - ;,;iii. <br />;. Native (potential) Vegetatlon•~~ ~ .. .~ <br />This site is a grassland plant communiCy with small amounts of 'shrubs,' <br />.pinyon pine, and Utah juniper. Grasses such as Indian~ricegrass, <br />native bunch bluegrasses, needle-and-thread, galleta, blue~grama; <br />lunegrass, squirreltail, and wheatgrasses make up the major: part of <br />the plant cover: Pinyon and juniper are generally present'.. Browse . <br />plants include big sage. mountain mahogany, serviceberry,•riorman tea, <br />and bitterbrush. Harry of the.forbs such as daisies. asters,.eriogonums,. <br />stemless goldenweed, phlox,.penstemon, and herbaceous sage are asso- <br />elated in the composJtlon. Sites having ten percent or more crown <br />canopy of pinyon and/or juniper are woodland sites. ' <br />i. <br />i <br />4 <br />r <br />I' <br />l <br />