Laserfiche WebLink
<br /> 16 Youga-Gateview complex, 3 to 25 percent slopes <br /> BRIEF NAP UNIT DESCRIP'CION <br /> This unit occurs on gently to moderately sloping alluvial fans and terraces. <br /> The main plant association is Arizona fescue/mountain muhly on both soils. <br /> Elevation ranges from 8,500 to 10,000 feet above sea level. The average annual <br /> precipitation is about 17 to 20 inches. <br /> COt~0.SITI0N AND INCLUSIONS <br /> This map unit is about 40 percent Youga soil on gentle slopes, end 35 percent <br /> Gateview soil on steeper sloping toeslopes that receive slopewash materials. <br /> Thc~ soil components of this unit are so intermingled that it was not practical <br /> to map them separately at the map scale used. Also in this unit is about 10 <br /> pec•cent Cabin soil. Included in this unit are areas of rock outcrop and shallow <br /> soils near rock outcrop. Included areas make up about 15 percent of this unit. <br /> SOUS <br /> <br /> The Youga soil is deep and well drained. It formed in glacial till and outwash <br /> of volcanic origin. Typically, the surface layer is black loam about 5 inches <br /> thick. The subsurface layer is very dark brown clay loam 5 inches thick. The <br />subsoil is dark yellowish brown clay loam 13 inches thick. The upper 5 inches <br /> of the substratum is dark yellowish brown sandy loam. The lower part of the <br /> substratum is dark yellowish brown very gravelly sandy loam that extends to 60 <br /> inches or more. <br />' Permeability of Lhe Youga soil is moderately slow. Availnblc water capncil.y is <br /> medium. Effective rooting depth is 60 inches or more. RunofF is moderate and <br />the water erosion hazard is moderate <br /> . <br /> The Gateview soil is deep and well drained. It formed in glacial till and <br /> outwash. Typically, the surface layer is very dark brown cobbly loam about 13 <br /> inches thick, The substratum is dark brown extremely cobbly sandy loam that <br /> extends to 60 inches or more. <br /> Permeability of the Gateview soil is rapid. Available water capacity is low. <br /> Effective rooting depth is 60 inches or more. Runoff is moderate and the water <br /> erosion hazard is moderate. <br /> POTENTIAL NATURAL VEGETATION <br /> <br /> The main plant association on both soils is Arizona fescueJmountain muhly. <br />Other plants in this association are fringed brome, needlegrass, blue grams. <br /> prairie junegrass, bottlebrush squirreltail, bluegrass, fringed sage, mountain <br /> muhl;J, pussytoes, and rabbitbrush. <br /> <br /> PRESI]iT VEGETATION <br /> <br />Blue grams dominates some sites in this unit. <br />U~ 'rn. ./nµl <br />/W'/'^ .. <br />a ~ ~ Pi <br />`~'~~"' <br />a~~ <br />,a. V,a-Tn.Q, <br />~Q„y~o p-a-~-~^ <br />~~L~y. ~~ <br />170 (i <br />~. G 1k. -~- ~~ <br />~ i„ . ~.. <br />~,, Lys-~-a -°'~~ <br />