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<br />PUEBLO AREA, COLORADO
<br />ilcrest Series
<br />e Gilcrest aeries consists of deep, somewhat e
<br />•es ively drained soils. These soils formed on alluv{~
<br />err cos and fans in sandy alluvium. The slope is 0 to
<br />9 pe ant, and elevation is 4,400 to 5,300 feet. The
<br />avers annual precipitation is 12 inches. The ave~age
<br />annual emperature is 52° F, and the frost-free season
<br />is 130 160 days. The native vegetation is rpamly
<br />plains gr ses andforbs.
<br />In a rep esentative profile the surface layer is brown
<br />sandy loam bout 4 inches thick. The upper part of the
<br />subsoil is pa a-brown sandy loam about 23 inct(es thick,
<br />and the love part is pale-brown gravelly coarse sandy
<br />loam about 8 ches thick. The underlying material is
<br />very pale bro gravelly sand that extends to a depth
<br />of 60 inches or re.
<br />Permeability i rapid, and the available; water capac-
<br />ity is low. The rface layer and subsoil are mildly
<br />alkaline, and the underlying materialiis moderately
<br />alkaline. The root ne extends to a depth of 60 inches
<br />or more. These soils a used far grazing.
<br />Representative pr le of Gilcrest ~andy loam, 0 to 2
<br />percent slopes, in gr s, 0.25 mile .east and 0.15 mile
<br />south of the northw t corner of; sec. 5, T. 18 S., R.
<br />sz w.
<br />A1~ to 4 inches, bro (7.5YR 5/2) sandy loam, dark
<br />brown (7.SYR 3/2) hen moist; weak, medium, platy
<br />structure; slightly hhrd, vory friable; slightly sticky
<br />and slightly plastic; ~any~ very fine roots; 5 percent
<br />B2t~ to 27 inches, pale-Down (lOYR 6/3) sandy loam,
<br />dark brown (lOYR 4/3 when moist; weak, medium,
<br />prismatic structure part] g to moderate, medium, sub-
<br />angular blocky; hard, ve friable; slightly sticky and
<br />slightly plastic; thin, patchy, clay films in pores and
<br />on sand grains; SO perce t gravel; mildly alkaline;
<br />clear, smooth boundary.
<br />B3-27 to 35 inches, pale brown OYR 6/3) gravelly eosrse
<br />Bandy loam, brown (lOYR /3) when moist; weak,
<br />medium, subangular blocky structure; hard, very friable;
<br />slightly sticky end' slightly pldcstic; 15 percent gravel;
<br />mildly alkaline; clear, smooth boundary.
<br />IIC~5 to 60 inches, very pale broods (lOYR 7/3) gravelly
<br />sand, brown (10~R 5/3) when moist; single grained;
<br />loose; nonsticky;and nonplastic; 20 percent gravel; rs]-
<br />esreous; moderately alkaline.
<br />Gravel makes up 5 to 25 percent of tAe A and B horizons
<br />and I5 to 35 percent of the IiC horizon. The Al horizon
<br />is 3 to 8 inches thick. The B2t horizon is 10 to 30 inches
<br />thick. In places a prominent horizon of Ilene accumulation
<br />is below the B2t horizon. Depth to the IIG horizon ranges
<br />from 24 to 40 inches.
<br />GcA-Gilcres( sandy loam, 0 to 2 percent elopes.
<br />This soil is on low alluvial terraces along s earns. The
<br />areas are elo~gated and cover as much as 00 acres.
<br />This soil ha the profile described as repress tative of
<br />the series.
<br />Included with this soil in mapping area of
<br />Bankard hand, generally along the drainageways. These
<br />areas make up less than 10 percent of the acres e.
<br />Runoff is slow, and the hazard of water erosi n is
<br />slight ut the hazard of soil blowing is high. The s ' is
<br />sub] t to occasional brief flooding.
<br />Is soil is used for grazing. The native vegetate n
<br />is ~nsinly blue grams, sand dropseed, rabbitbrush, cane
<br />c ctus, and wild buckwheat. Capability unit VIe3, non-
<br />ated ;Sandy Plains range site.
<br />
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<br />GeI)`Cilerest gravelly sandy loam, 3 to 9 percen
<br />el .This soil is mostly on the top of mesas. The a
<br />are ' egular in shape and cover as much as 1,800 ac s.
<br />This oil has a profile similar to the one describ as
<br />repr ntative of the series, but the eurface er is
<br />gravel] sandy loam. Also, the layer of clay ac muta-
<br />tion is ut 10 inches thick and about 25 p cent of
<br />it is gra 1. Beneath that is a prominent, b t discon-
<br />tinuous, 1 er of lime accumulation abo 9 inches
<br />thick that ~ about 35 percent gravel. Th underlying
<br />material is avelly loamy sand or gray ly sand that
<br />is about 15 pe ant gravel.
<br />Included wi this soil in mappin are areas of
<br />Schamber grave • sandy loam. These ncluded soils are
<br />in steeper areas d make up about 5 percent of the
<br />acreage.
<br />Runoff is slow, a the Lazar of water erosion is
<br />slight.
<br />This soil is used for azing,The native vegetation
<br />is mainly blue grams, s e-oajs grams, sand dropseed,
<br />needlegrass, sand sage, uc9a and buckwheat. Capa-
<br />bility unit VIe-3, nonirr~ tad; Sandy Plains range
<br />site.
<br />GfC-f:ilcrest eomple 3 0 6 percent slopes. This
<br />complex is on fans at t foot f mesas in the northern
<br />part of the survey a It is made up of about 70
<br />percent Gilcrest san loam an of 15 percent soils
<br />that are similar to G' crest sandy 1 m but are underlain
<br />by shale at a dept of 20 to 40 i has. Areas of this
<br />complex are elon tad and have co ave slopes.
<br />The Gilcrest s l in this complex h a profile similar
<br />to the one desc 'bed as representative of the Gilcrest
<br />series, but it s less gravel and coarse and.
<br />Included' th these soils in mapping re areas of
<br />Schamber g avelly sandy loam that make p about 10
<br />percent of he acreage and areas of Razo clay loam
<br />that mak up about 5 percent. The Schambe soils are
<br />on narro ridges and steeper side slopes, and t e Razor
<br />soils ar on ridges and small knobs.
<br />Ru ff is slaw, and the hazard of water ero 'on is
<br />sligh .
<br />T ese soils are used for grazing. The native veg -
<br />ti is mainly blue grams, galleta, sand dropseed, ra e
<br />c ctus, yucca, and sand sage. Capability unit VI ,
<br />onirrigated ;Sandy Plains range site.
<br />Glenberg Series
<br />The Glenberg 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 4,800 feet. The average annual precipitation is 12
<br />inches. The average annual temperature is 53° F, and
<br />the frost-free season is 145 to 175 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 5 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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