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<br />E~ioit B - Sitta Description • page 4
<br />SOIL SURVEY
<br />chained or poa~ly drained soils that formed in alluvium.
<br />'these soils are on terraces, Oond plnins,;uui dt:ainage-
<br />ways, hluvntiou ranges from 9,800 to 5,600 fuel Slopes
<br />are 0 to 1 percent. The native vegebrtiou is sedges,
<br />bluegrass, timothy, and other water-tolerant grasses
<br />and fortis. Mean annual precipitation ranges from 73
<br />to 15 inches, mean annual air temperature rouges from
<br />98° to 50° F, and the frost-free season ranges from
<br />135 to 150 days.
<br />In a 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 />loam about 30 inches thick.
<br />Permeability is moderately rapid, and the available
<br />water capacity is high. Reaction is moderately alkaline.
<br />These soils are used mainly for hay and grazing, A
<br />few areas are used for irrigated crops and pasture.
<br />Representative profile of Poudre fine sandy loam, 0
<br />to 1 percent slopes, in native grass, about 100 feet east
<br />of the west quarter corner of sec. 39, T. 8 N., R. G9 W.:
<br />All-0 to 10 inches; gray (lOYR 5/1) fine sandy
<br />loam, very dat•k 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 soaplilce; many medium and
<br />large mica Ilakes;calcareous; moderately
<br />alkaline; clear wavy boundary.
<br />A12-1(~ to 30 inches; grayish brown (lOYR
<br />5/2) fine sandy loam, very dark grayish
<br />brown (lOYR 3/2) moist; common me-
<br />dium distinct dark yellowish brown
<br />(lOYR 4/9 and 9/6) moist mottles; weak
<br />meditnn subangular blocky structure
<br />parting to coarse granul;u•; crushed soil
<br />surface feels slippery and so:tplike; mauy
<br />fine to large mica flakes; calcareous;
<br />moderately alkaline; gradual smooth
<br />boundary.
<br />B2g-30 to GO inches; light brownish gray (lOYR
<br />G/2) fine sandy loam, grayish brown
<br />(lOYR 612) moist; many large promi-
<br />nent light yellowish brown (lOYR GJ4)
<br />moist mottles; massive; slightly Itar<l,
<br />friable; nonsticky and nonplastic;
<br />crushed soil surface feels slippery and
<br />soapli]ce; many fine to large mica Hakes;
<br />calcateous; moderately alkaline.
<br />The A horizon ranges from fine sandy loam to smtdy
<br />loam 20 to 90 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 alkalino to moderately alkaline. Gravel is at a
<br />depth of 90 to GO inches in some profiles.
<br />II4-Poudre fiat emuly loran, 0 to 1 rcrcent elopes.
<br />This level soil is on law terraces and Hood plains.
<br />Included with this soil in mapping are a few small
<br />areas of soils that are more sloping. Also included are a
<br />few areas of sails in which gravel is at a depth of less
<br />than 90 inches, a few gravel bars, and a few small
<br />areas of Loveland, Caruso, and Paoli sails,
<br />Rmtaff is slow, and the hazard of erosion is slight.
<br />If irrigated, this soil is suited to pasture and hay.
<br />Barley, alfalfa, corn, and suy:ar beets can be firown if
<br />the water table is lowered. The soil is also well suited
<br />to pasture and native grasses. Capability unit IVw-
<br />irrigated; Wet Mcndow range site; windbreak su
<br />ability group 5.
<br />API r~•n~r She
<br />The Purner series consists of shallow, well drain
<br />soils that formed in material weathered from reddi
<br />brown sandstone. These soils are on uplands and a
<br />underlain by sandstone at a depth of ]0 to 20 inch.
<br />Elevation ranges from 5,800 to 6,900 feet. Slopes a
<br />1 to 30 percent. The native vegetation is mainly bl
<br />grams, wheatgrasses, mountainmahogany, and sat:
<br />other fot•bs and shrubs. Mean annual precipitati~
<br />ranges from 13 to 15 inches, mean annual air temper
<br />tore ranges from 47° to 49° F, and the frost-fr
<br />season ranges from 115 to 130 days.
<br />In a representative profile the surface layer
<br />reddish brown fine sandy loam about 7 inches thic
<br />The underlying material is light reddish brown fit
<br />sandy loam about 7 inches thick. Below this is hat
<br />reddish brown sandstone.
<br />Permeability is moderate, and the available tvat~
<br />capacity is lmv. Reaction is mildly alkaline above
<br />depth of about 7 inches and moderately alkaline helu
<br />that depth.
<br />These soils are used mainly for native grasses.
<br />Representative profile of Purner fine sandy loam,
<br />to 9 percent slopes, in native grass, about 1,000 fey
<br />north and G50 feet west of the southwest corner of sc
<br />22, T. 10 N., R. 70 W.:
<br />AI-0 to 7 inches; reddish brown (5YR 9/:1
<br />fine sandy loam, dark reddish brow
<br />(5YR 3/3) moist; weak medium sal
<br />angular and weak to moderate mediw
<br />granular structure; slightly hard, ver
<br />friable; calcareous;rnildly alkaline;clea
<br />smooth bowtdary.
<br />Cca-7 to 14 inches; light reddish brown (5Y1
<br />G/3) fine sandy loam, reddish bt•oty
<br />(5YR 5/3) moist; weak medium sal.
<br />angular blocky structure; slightly hair
<br />very friable; calcareous; visible seconc:
<br />ary calcium carbmtate as seams au
<br />streaks and fineh* divided forms; model
<br />ately alkaline; clear smooth boundary.
<br />R-19 to GO inches; hard reddish brown sandstone
<br />The A horizon is sandy loam or fine sandy loam 6 t
<br />12 ittcltes thick. Content of rock fragments, mainl;
<br />gravel-size sandstone, ranges from 0 to 15 percent
<br />The A horizon is leached of lime for a few inches it
<br />places. The zone of lime accumulation is immediatel;
<br />above or in the upper part of the bedrock in places.
<br />85-Purner fine sandy loam, I to 9 percent elopes
<br />This nearly level to strongly sloping soil is on upland:
<br />and ridges. Tltis soil has the profile described a:
<br />represettt<ative of the series.
<br />Included with this soil in mapping are some smal
<br />:tt•eas of soils that have a surface layer of loam. Alsr
<br />included are small areas of soils that have more stones
<br />in the sw•face layer, small areas of Rock outcrop, and ;
<br />few small areas of Kirtley soils.
<br />Runoff is rapid, and the hazard of erosion is severe.
<br />Tltis soil is suited to pasture and native grasses.
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