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<br />:') grOUping alsO' includes about 19 percent miacellaneous land types; a:, percent
<br />....-l deep, moderately coarse tco fine textured AlluvialsQUs" 14 percen.tlllt1CieUtely
<br />coarse to medium textured LithO'so-ls; and 4 per.c.ent Humic (Hey soill/.
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<br />This grouping has the largest acreage of irrigated land in the GunniSGIl River
<br />Basin (131.600 acres), with about 7$,000 acres af the Brown soils, 13,,960
<br />acres o,:f Chestnut SGHS, 37,04Q acresaf Humic Gley, sails and 5.600 acres
<br />of Alluvial. SQils. The COlIImQn natural vegetatiOllcousists of sllgebrush,
<br />juniper. pinYlID pine, western wheatgrass, phlox, Indian rice grasa, needle-
<br />and-thread grass and s~uirrel tail.
<br />
<br />J., , Npuntain Pra:l..rie..chestnut
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<br />Soils af thi$ groU'p'ing. have developed nnder a higher effective p:rec:ipitation
<br />th,l!n thQae in so-ilgrouping number 2. They have d~ellijiJed.{)1l gently to'
<br />moderately slcping Alluvial fans and valley fills, and steep tD very s~ep.
<br />mauntaineus uplands, in glacial till af mixed parent reck and alluvium and
<br />residuwn frQlIl a variety af par,ent rocks at elevations ranging frQlIl 7,000
<br />to' 9,000 feet. They are moderatelY d~ to' deep,DIGderately coarse to'
<br />DIGde:rate1y fine textured soils which are slightly alkaline to' slightly acid
<br />in reaction and generally the lime is leached deeper in the soil profile
<br />than. soils in grouping nwnber 2. ',l'his grouping aisa in<::lude:s about 17 per-
<br />cent miscellaneous land types; 7 percent mO'derately C04rse tO'medium textured
<br />Lithosolsj and 5pe.rcent deep, DIGderately cqarse to' moderately fine textured
<br />Alluvial Soils with inelusisna af deep, m~r.a.l;ely coarse to' moderately fine
<br />t~tured Humic ~ley sails.
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<br />About 36,700 acreS of this sail grouping are irrigated, with 8,000 acres
<br />of M&untain Prairie soils, 22,000 acres of Chestnut soils and 6,100 a~es
<br />of Alluvial soih. The common natural vegetation consists .of big sagebnish.
<br />qakbrush, . service berry ,chake . cherry, Arizona fescue, mountain muhlenbe:rgia,
<br />and weStern wheatgrass. Some goad stands qf ponderosa pine are alsO'. found
<br />on thesesaUs.
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<br />4. Gray.. Wo$ded"Brown. ~1.ic-Maunl:fi.!1 Prairie
<br />
<br />Sails O'f this grouping have devel~under high effective ]tt'ecipitation
<br />on moderate to strongly sloping valley fills, alluvial fans and mesa tops,
<br />and steep to very steep mountainous uplands, in alluvium, residuum and
<br />Colluvium, from sandstone, shale, t.uff and rhyalite, at elevations ranging
<br />from 9,000 to 11,500 feet. They are moderately deep to' deep, moderately
<br />coarse to' moderately fine textw:'ed sails, generally with a high percentage
<br />O'f large angular pieces of parent rack throughout the pro.file, neutral ell
<br />acid in reaction and have the lime leacheddee:p intO' the p.arent material.
<br />COIIl1I1OU in.clusions in this grO'uping are small, wetdepres$ional areas of
<br />peat, muck and mineral saiL '!his grouping alsO' includes about 21 percent
<br />miscellaneous la.nd types; 18 percent deep. moderately coarse to' moderately
<br />fine textured Alluvial sails j and .5 percent moderately coarse to. medium
<br />textured. Lithosols.
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