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'AONIA Af1EA, COLORADO • In the Absarokee soil, permeability is moderately slow and available water capacity .~ low. Effective rooting 7eplh is 20 to 40 inches. Surface runoff is medium. The Hazard of erosion Irom wind is slight and Irom water is moderate. On the Absarokee soil the naive vegetation consists mainly of Gambel oak, serviceberry, big sagebrush, wheatgrasses, and bromes. The Work soil is deep and well drained and overlies sandstone at a depth of 60 inches or more. II formed in material weathered from sandstone and in reworked eolian material. Typically the surface layer of the Work soil is dark brown loam about 6 inches duck. The subsoil is brown clay about 33 inches thick. The substratum is very pale brown channery loam and extends to a depth of 60 inches Or more. In the Work soil, permeability is moderately slaw and available water capacity is high. Effective rooting depth is fi0 inches or more. Surtace runoff rs medium. The Hazard of erosion from wind is slight and from water is moderate to high. On the Work soil the native vegetation consists mainly of wheatgrasses, bluegrasses, bromes, big sagebrush, ~akbrush, and serviceberry. ''nst areas of this complex are used for grazing by :k and wildlife and for recreational purposes. . potential plant community on the Absarokee soil consists mainly of Gambel oak, mountain brome, nod- ding brome, slender wheatgrass, and elk sedge. As range condition deteriorates, mountain brome, nodding brome, slender wheatgrass. and elk sedge decrease, )orbs and woody shrubs increase, and undesirable weeds and annual plants invade and become more abundant. The potential plan) community on the Work soil con- suls mainly of wheatgrasses, bluegrasses, and needle- grasses. As range condition deteriorates, the wheat• grasses and needlegrasses decrease, torbs and woody shrubs increase, and undesaable weeds and annual plants invade and become mare abundant. Seeding is advisable on the soils in this complex if range is in poor condition. Slender wheatgrass, blue- bunch wheatgrass, western wheatgrass, and big blue- grass are suitable for seeding Grasses that meet the seasonal requirements of livestock should be selected. Preparing a seedbed and drilliny the seed help to obtain the best results. Good pasture and range management rs needed to maintain the grasses. On some sites control of eompeing shrubs rs rcyuir~d to improve ranyc condr tion. These soils are used for winter ranye by mule deer ~' end elk. Some imponanl plant speaes which can be ^anaged for optimum production are bitlerbrush, moun• 3hogany, Gambel oak, serviceberry, and elk sedge. -producing shrubs are used by black bear. This soil provides habitat for Merriam turkey, blue yrouse, and 9 band-tailed pigeon. In Iavorable years, mature Gamhell oaks produce acorns, which are used by Merriam turkey. )' II these soils are used for urban development, the main limitations arc depth to bedrock, shrink-swell poten- 6a1, anU slope !f They aro used lo+ sepl+c tank dbsorplion Gelds, permeability is also a Lmdalion. The hmdauons can be overcome by the use of proper design and con- slruction methods. These soils arc in capability subclass Vle, nonirrigated. 3-Agua Fria stony loam, 3 to 12 percent slopes. This is a deep, well drained soil. II formed in cobbly and stony outwash alluvium derived from basal) and is on old terraces, mesas, and tans. Elevation ranges Irom 5,800 to 7,000 feel. Average annual precipitation is about 13 ruches, average annual arr temperature rs about 47 de- grees F, and the average Irosi-free season is about t 15 days. Typically the surlace layer is brown stony loam about 2 inches thick. The subsoil is reddish brown or light . brown stony clay loam about 22 inches thick. The upper' part of the substratum is pink cobbly loam about 10 inches thick. The lower pan, to a depth of 60 inches, is pink very cobbly loam. Permeability is moderately slow, and available water capacity is high. Effective rooting depth rs 60 ruches or more. surlace runoll is medium. The hazard of erosion, Irom wind is slight and Irom wafer is moderate Included wdh this sod m mapping are a few small areas of Saralon, Mesa. Avalon, Cerro, aria Dclson soils. l~ .n some places the surface layer is free of stones or u stony clay loam. In some small areas marl is al a depth Of less Than 40 inches. Some areas have IesS clay in the subsoil. In some areas the surface layer is very stony. The native vegetation on This soil consists mainly of big sagebrush, pinyon, and lunrper (fig. 2). Western wheatgrass, Indian ricegrass, needleandlhread, and June- grass arc common grasses About hall of the acreayc of th+s sod +s used for grazing of Irvestock and wildlife and for recreational pur- poses. Some areas are in noncommeraal forest and are ~ used for limited grazing of livestock and wildlife and for recreational purposes. A small acreage is irrigated and is used for pasture. hay, and orchard crops This sod is suited to au of the crops commonly grown m Ihu survi~y area. Shortness of the yrowu+q season may limit the choice of crops Because OI SlOnin~55. sunace clearing or rock picking may be required so that the soil can be I+Iled. Moisture mtakti rate of the surface layer is moderate and moderately stow. and the soil is easy to work d stones and cobbles art' removed This sod can oe kept in continuous row crops it crop reSiduC is used to maintain an adequate content of organic maser. Good management of irrigation water and lantl leveling help to conserve irngal+on water and w control eroswn. Mmi~ mum tillage anU use of cover crops and green manure crops also help to maintain organic matter content and to control erosion. . N~~'•.' c '. .-