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<br />46
<br />SOIL SURVEY
<br />dt•aisted or poorly drainEad soils that formed in al}uvium.
<br />These soils are on terraces, flood plains, and drainage-
<br />+vays. Ete+~ation ranges from 4,800 to 5,600 feet, Slopes
<br />ar•e 0 to 1 percent. Tlse native vegetation is sedges,
<br />bluegrass, timothy, and other water-tolerant grasses
<br />and (orbs. Mean annu:~.l precipitation ranges from 13
<br />to 15 inches, mean annual ait• temperatut•e ranges from
<br />]b° to 50° F, and the fl•ost-free season ranges from
<br />1 ~) to 150 days.
<br />1 n :~ representative profile the surface layer is gray
<br />and grayish brown fine sandy loam about 30 inches
<br />thick. The subsoil is light brownish gray fine sandy
<br />foam about 30 inches thick.
<br />['ermeability is mod~at•ately rapid, and the available
<br />++•sttet• capacity is hig}t. Reaction is moderately alkaline.
<br />TI)ese soils are used mainly for hay and ga•aztng. A
<br />fe+v stress are used for irrigated crops and pasture.
<br />Representative profile of Poudre fine sandy loam, 0
<br />to 1 percent slopes, ~n inatrve grass, about 100 feet east
<br />of the «~est quarter corner of sec. 34, T. 8 N., R. 69 W.:
<br />All-0 to 10 inch~zs; gray (lOYR 5/1) fine sandy
<br />loam, very dark gray (lOYR 3/1) moist;
<br />moderate medium granular structure;
<br />slightly hard, very friable; nonsticky and
<br />nonplastic; crushed soil surface feels
<br />slippery ;and soaplike; many medium and
<br />large rates flakes; calcareous; moderately
<br />alkaline; clear wavy boundary.
<br />a i'2---IO to 30 inches; grayish brown (IOYR
<br />5/2) fine sandy foam, very dark grayish
<br />brown (lOYR 3/2) moist; common me-
<br />dium distinct dark yellowish brown
<br />(lOYR 9,/4 and 4/6) moist mottles; weak
<br />medium subangular blocky structure
<br />parting I.o coarse granular; crushed soil
<br />surface feels slippery and soaplike; many
<br />fine to large mica flakes; calcareous;
<br />moderatF~ly alkaline; gradual smooth
<br />boundary.
<br />B2g-30 to 60 inches ;light brownish gray (lOYR
<br />6/2) fine sandy foam, grayish brown
<br />nent ligltt2ye] owish bro wn 1(lUYRt6/4)
<br />moist mottles; massive; slightly hard,
<br />friable ; nonsticky and nonplastic ;
<br />crushed soil surface feels slippery and
<br />soaplike; many fine to large mica Rakes;
<br />calcareous; moderately alkaline.
<br />The A ltorizon ranges from fine sandy loam to sandy
<br />loam 20 to 40 inches thick. Thickness of the mollic
<br />epipedon is 24 to 50 inches. Content of rock fragments
<br />ranges from 0 to 15 percent. Reaction ranges from
<br />mildly alkaline to moderately alkaline. Gravel is at a
<br />depth of 40 to 60 inches in some profiles.
<br />8~1-Pou~lre fine sandy loam, 0 to.l percent slmpee.
<br />This level soil is on to++~ terraces and flood plains.
<br />lncluded with this soil in mapping are a few small
<br />at•eas of soils that are more sloping. Also included are a
<br />fe+e areas of soils in which gravel is at a depth of less
<br />than 40 inches, a fe~v gravel bars, and a few small
<br />areas of Loveland, Caruso, and Paoli soils.
<br />Runoff is slow, and Che hazard of erosion is slight.
<br />If irrigated, -this soil is suited to pasture and hay.
<br />Batley, alfalfa, corn, sand sugar beets can be grown if
<br />the water table is lowered. The soil is also well suited
<br />to pasture and native grasses. Capability trait IV+v-1,
<br />irrigated; Wet D'feado~v range site; windbreak suit-
<br />ability group 5.
<br />Pottier Series
<br />The Pua'ner series consists of shallow, well drained
<br />soils that formed in material weathered from reddish
<br />brown sandstone. These soils at•e on uplands and are
<br />underlain by sandstone at a depth of 10 to ?0 inches.
<br />Elevation ranges from 5,800 to 6,400 feet. Slopes are
<br />l to 30 pet•cent. The native vegetation is mainly blue
<br />grams, wheatgrasses, mountainmahogany, .and some
<br />other fos•bs and shrubs. Mean annual precipitation
<br />ranges from 13 to 15 inches, mean annual air tempet•a-
<br />ture ranges from 47° to 49° F, and the frost-free
<br />season ranges from 115 to 130 days.
<br />In a representative profile the surface layer is
<br />reddish brown fine sandy loam about 7 inches thick.
<br />The underlying material . is light reddish brown fine
<br />sandy loam about 7. inches thick. Below this is hard
<br />reddish brown sandstone.
<br />Permeability is moderate, and the available water
<br />capacity is lo~v. Reaction is mildly alkaline above a
<br />depth of about ? inches and moderately alkaline below
<br />that depth.
<br />These soils are used mainly for native grasses.
<br />Representative profile of Purner fine sandy loam, 1
<br />to 9 percent slopes, in native grass, about 1,400 feet
<br />north and 650 feet west of the southwest corner of sec.
<br />22, T. 10 N., R. 70 W.:
<br />Al-0 to 7 inches; reddish brown (5YR 4/3)
<br />fine sandy loam, dark reddish brown
<br />(5YR 3/3) moist; weak medium sub-
<br />angular and weak to moderate medium
<br />granular structure; slightly hard, very
<br />friable; calcareous; mildly alkaline; clear
<br />smooth boundary.
<br />Cca-7 to 14 inches; light reddish brown (5YR
<br />6/3) fine sandy loam, reddish brown
<br />(5YR 5/3) moist; weak medium. sub-
<br />angular blocky structure; slightly hard,
<br />very friable; calcareous; visible second-
<br />ary calcium carbonate as seams and
<br />streaks and finely divided forms; moder-
<br />ately alkaline; clear smooth boundary.
<br />R-14 to ti0 inches;.hard reddish brown sandstone.
<br />The A horizon is sandy loam or fine sandy loam 6 to
<br />12 inches thick. Content of rock fragments, mainly
<br />gravel-size sandstone, ranges from 0 to 15 percent.
<br />The A horizon is leached of lime for a few inches in
<br />places. The zone of lime accumulation is immediately
<br />above or in the upper part of the bedrock in places:
<br />85-Purner fine sandy .loam, 1 to 9 percent .elopes.
<br />This nearly level to strongly sloping soil is on uplands
<br />and ridges. This soil has the profile described as
<br />representative of the series.
<br />Included with .this soil in mapping are same small
<br />areas of soils that have a surface layer of loam. Also
<br />included are small areas of soils that have more stones
<br />in the surface layer, small areas of Rock outcrop, and a
<br />fe.v small areas of Kirtley soils.
<br />Runoff is rapid, and the hazard of erosion is severe.
<br />This soil is suited to pasture and native grasses.
<br />~'Z7
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