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<br />PUEBLO AREA, COLORADO
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<br />Gilcrest Series
<br />' 'Th~'Gilcrest aeries consists of deep, somewhat ex-
<br />c~ssirely drained soils. These soils formed on alluvial
<br />~te>;~aces and fans in sandy alluvium. The elope is 0 to
<br />0 percent, and elevation is 4,400 to 6,300 feet. The
<br />ravll'Age annual precipitation is 12 inches. The average
<br />~ annual temperature is 62° F, and the frost-free season
<br />is 180 to 160 days. The native vegetation is mainly
<br />plhlna grasses and forbs.
<br />• I a representative profile the surface layer is brown
<br />san~y loam about 4 inches thick. The upper part of the
<br />8aubsotl is pale-brown sandy loam about 23 inches thick,
<br />end the lower part is pale-brown gravelly coarse sandy
<br />'"loam about 8 inches thick. The underlying material is
<br />very pale brown gravelly Band that extends to a depth
<br />of 60 inches or more.
<br />sPermeability is rapid, and the available water capac-
<br />+ity,is ]ow. The surface layer and subsoil are mildly
<br />alkaline, and the underlying. material is moderately
<br />alkaline. The root zone extends to a depth of 60 inches
<br />or tree. These soils are used for grazing.
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<br />~tepresentative profile of Gilcrest sandy loam, 0 to 2
<br />'percent slopes, in grass, 0.25 mile east and 0.16 mile
<br />south of the northwest corner of sec. 6, T. 18 S., R.
<br />62 W.
<br />Al-0 to 4 inches, brown (7.6YR b/2) sandy loam, dark
<br />brown (7.6YR 3/2) when moist; weak, medium, platy
<br />•'structure; slightly hard, very friable; slightly etieky
<br />a - and slightly plastic; many very fine roots; 6 Dereent
<br />•r gravel; mildly alkaline; clear, smooth boundary.
<br />B2t--4 to 27 inches, pale-brown (lOYR 6/3) Bandy loam,
<br />• ~1° dark brown (lOYR 4/3) when moist; weak, medium,
<br />` prismatic structure parting to moderate, medium, aub-
<br />~ angular blocky; hard, very friable; slightly etieky and
<br />' r slightly plastic; thin, patchy, clay fllros in pores end
<br />on send grains; 10 percent gravel; mildly alkaline;
<br />' "" clear, smooth boundary.
<br />B3-27 to 35 inches, pale-brown (lOYR 6/S) gravelly eoarae
<br />sandy loam, brown (lOYR b/3) when moist; weak,
<br />medium, subangular blocky etrueture; hard, very friable;
<br />slightly etieky and slightly plastic; 16 percent gravel;
<br />mildly alkaline; clear, smooth boundary
<br />IIC--35 to 60 inches, very ppale brown (lOYR 7/3) gravelly
<br />send, brown (lOYR 6/3) when moist; single grained;
<br />~~ loose; nonsticky end nonelastic; 20 percent gzevel; ca1-
<br />,p, careous; moderately alkaline.
<br />Gravel makes vp 6 to 25 percent of the A and 8 horizons
<br />end 15 to 35 percent of the IIC horizon. The Al horizon
<br />is 3 to 8~inchee thick. The B2t horizon is 10 to i10 inehee
<br />• thick. In places a prominent horizon of lime accumulation
<br />is below the B2t horizon. Depth to the IIC horizon ranges
<br />~~ from 24 to 40 inehee.
<br />GcA-Gilcrest sandy loam, 0 to 2 percent elopes.
<br />This soil is on low alluvia] terraces along streams. The
<br />areas'are elongated and cover as much as 800 acres.
<br />•Tl4is soil has the profile described as representative of
<br />the series.
<br />Included with this soil in mapping are areas of
<br />Bankard sand, generally along the drainageways. These
<br />areas make up less than 10 percent of the acreage,
<br />- Runoff is slow, and the hazard of water erosion is
<br />'''blight, but the hazard of soil blowing is high. The soil is
<br />subject to occasional brief flooding.
<br />This soil is used for grazing. The native vegetation
<br />is mainly blue grama,sand dropseed,rabbitbruah,cane
<br />cactus, and µ•ild buckwheat. Capability unit VIe3, non-
<br />, irrigated ;Sandy Plains range site.
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<br />GeI;`Gilcrest gravelly sandy loam, 3 l0 9 percent
<br />elopes. This soil is mostly on the top of mesas. The areas
<br />are irrggular in shape and cover as much as 1,800 acres.
<br />This soil has a profile similar to the one described ae
<br />representative of the series, but the surface layer is
<br />gravelly sandy loam. Also, the layer of clay accumula-
<br />tion is about 10 inches thick and about 26 percent of
<br />it is gravel. Beneath that is a prominent, but discon-
<br />tinuous, layer of lime accumulation about 9 inches
<br />thick that is about 36 percent gravel. The underlying
<br />material is gravelly loamy sand or gravelly sand that
<br />is about 15 percent gravel.
<br />Included with this soil in mapping are areas oP
<br />Schamber gravelly sandy loam. These included soils are
<br />in steeper areas and make up about 15 percent of the
<br />acreage.
<br />Runoff is slow, and the hazard of water erosion is
<br />slight.
<br />This soil is used for grazing. The native vegetation
<br />is mainly blue grams, side-oats grams, sand dropseed,
<br />needlegrass, sand safe, yucca, and buckwheat. Capa-
<br />bility unit VIe-3, nonirrtgated; Sandy Plains range
<br />site.
<br />GfC-Gilcrest complex, 3 to 6 percent slopes. This
<br />complex is on fans at the foot of mesas in the northern
<br />part of the survey area. It is made up of about 70
<br />percent Gilcrest sandy loam and of 15 percent soils
<br />that are similar to Gilcrest sandy loam but are underlain
<br />by shale at a depth of 20 to 40 inches. Areas of this
<br />complex are elongated and have concave slopes.
<br />The Gilcrest soil in this complex has a profile similar
<br />to the one described as representative of the Gilcrest
<br />aeries, but it has less gravel and coarse Band.
<br />Included with these soils in mapping are areas of
<br />Schamber gravelly sandy loam that make up about 10
<br />percent of the acreage and areas of Razor clay loam
<br />that make up about 6 percent. The Schamber soils are
<br />on narrow ridges and steeper side slopes, and the Razor
<br />soils are on ridges and small knobs.
<br />Runoff is,elow, and the hazard of water erosion fa '
<br />slight.
<br />These soils are used for grazing. The native vegeta-
<br />tion is mainly blue grams, gaiters, sand dropseed, cane
<br />cactus, vucca, and sand sage. Capability unit ,VIe~,
<br />nonirrigated; Sandy Plains range site.
<br />Gfenberg Series
<br />The Glenberq series consists of deep, well-drained
<br />soils. These soils formed on flood plains in loamy allu-
<br />vium, The slope is 0 to 2 percent, and elevation is 4,300
<br />to 4,Sb0 feet. The average annual precipitation is 12
<br />inches. The average annual temperature is 63° F, and
<br />the frost-free season is 14b to 176 days. The native
<br />vegetation is mainly plains grasses.
<br />In a representative profile the surface layer is light
<br />brownish-gray fine sandy loam about 6 inches thick.
<br />Below that is pale-brown fine sandy loam stratified
<br />with loamy fine sand and loam that extends to a depth
<br />of 60 inches or more.
<br />Permeability is moderately rapid, and the available
<br />water capacity is moderate. These soils are moderately
<br />alkaline. Their root zone extends to a depth of more
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