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<br />ARAPAHOE COUNTY, COLORADO
<br />This soil has been cultivated, but most of the acreage is
<br />now in grass. Because of the severe hazard of erosion, this
<br />soil sbmdd nut be used for cultivated crops. (Capability
<br />Wait \'Ie~; llcep Sand I:xngc site; t.rce planting suita-
<br />blllt}' gl'Oll1) ~)
<br />Bjakeland loamy sand, I to 20 percent slopes IBoEI•-
<br />'I'bis undulating to hilly soil occurs mainly in the western
<br />three-fuurthsof the county, genel:211y in areas less than 1G0
<br />,errs in size. Phis soil has the profile described as typical
<br />fur the series. lscen though this soil is sandy, it is hard
<br />cuuu_rb to resit di;fgiug when dry.
<br />Iuchuled with this soil in mapputg were small areas of
<br />'I'rncktnu loauly s:uul.
<br />'t'his soil is used vainly for untive range. Under good
<br />ul:uingement, it la'oduces an excellent stand of forage
<br />pl:utts, mainly null grasses ;uul [3111 glasses. 'I'bis soil Is
<br />ant sorted to cultivated crops ]x:c:uise It 1s dralgbty ;mrl is
<br />1lighh• sttsce ltible to soil blmving if left without a vegeta-
<br />t.ivecnver. (~:ap:tbility unit VIe~; llcep Sand range s1te;
<br />I rce p1:u11 iug suitability group 3)
<br />Bresset Series
<br />The lit•essm• series consists of deep, level to steep soils
<br />I hat urcur uu stream terrnces;uxl un uldands in f.be o•eslern
<br />tlnrc-fnnrths of the county, 'These srnls developed in non-
<br />c:deareous, s:uuly maleriul deposited by wind :uul water.
<br />In a t}'pictl profile the sin•face layer is dark grayish-
<br />brutvu sandy loom about !i inches thick.'1'hc subsml, about
<br />°_:. inches thick, is dark-brown sandy ]o:un in t.ho np )cr
<br />part, brown sandy clay lo;un in the middle p:u•t, and lig~lt-
<br />bruvvu saudv lu:un that contains shall balls of clay in t.bc
<br />layer p:ut.~1'he underlying material is light ycllo+vish-
<br />bra+vn lo:uny sand tb:1t cunL•tins a few small balls of clay.
<br />In :urns in crops m• grass, the 13resscr soils Lave amod-
<br />nrnto In rapid talc of +cnter int:d:e. In bare are;ts, bo+vevm•,
<br />crustin_r is likely, and the intake rate is modcr:tte or slow.
<br />'1'be available +catcr holding capacity is modmate. '1'hcsc
<br />soils me cosily penet.rtted by roots and generally are morl-
<br />cratc in natural fertility, but unpt•otected arcas:ur highl}•
<br />susceptible to +cater erosion and to soil blo+ving.
<br />These soils are used mainly for cultivated crofts. R'inter
<br />wheat is the principal crop, but barley and sorghums arc
<br />also grown.: few small areas are irrigated, and corn and
<br />nifnlfa groxc+cell inthese areas.
<br />'Typical profile of a 13resser sandy loam, 600 feet went
<br />and 100 feet south of the northeast corner of section °l,
<br />T. 5 S., R. G11V.:
<br />.tl~ to 5 iaches, dark grayish-brown (lOYR 4/?) s:uuly loau4
<br />very dark gray brown (10YR 3/2) when moist; wenk,
<br />fine, granular structure; hn rd when dry, loose when
<br />moist; noncalcarcous: clear, slightly wavy boundary.
<br />B2t-3 to 1G inches, brown (7,F1'R 9/3) sandy cla9 loam, brown
<br />brown (]OYR a/3) when moist; weak, medium, pris-
<br />matic structure that breaks to weak, medium, sub-
<br />angular blocky structure; hard when dry, very friable
<br />wheo moist; thin, pn[chy slap films on some peds;
<br />noncalcarcous ;clear, wavy boundary.
<br />B2t-0 to 1G inches, brown (7.5YR 4/3) randy clay loam, brown
<br />17bYR 4/3) wken moist and crushed; moderate, me-
<br />dium and floe, prismatic structure [hot breaks to
<br />modernfe, medium, n»gnlnr blocky structure; very
<br />hard when dry, firm when moist; thin, nearly con-
<br />tinuous clay films on peds; nodules or spots of heavy
<br />cloy; dark stains on outside of peds; ooncalcn reous;
<br />clear, wavy boundary.
<br />13
<br />R3-1G Co 2S inches, light-browu (7.5YR G/3) snndp loam,
<br />brown (7.5YR 5/3) when moist; weak to moderate,
<br />coarse, prismatic structure that breaks to wenk to
<br />moderate, coarse, angnlnr blceky structure; very hard
<br />when dry, very friable when moist; thin, patchy clay
<br />films on vertical faces of pWS; balls of clay tbnt are
<br />5 [0 15 millimeters in diameter; noncalrnreons;
<br />gradual, wavy boundary. .
<br />C-23 to 50 inches, .light yellowish-brown (lOYR G/4) loamy
<br />sand, yellowish brown (IOYR 5/4) when moist; weak,
<br />coarse, prismatic structure that breaks to wassive
<br />(structureless); hard when dry, loose wheo moist;
<br />few balls of clay Uta[ arc 5 to 10 millimeters in diaw-
<br />c[cr; noncalcarcous.
<br />The :1 hm~izon generally is sandy loam but ranges frmn loam
<br />to loamy sand. It is 9 to 12 inches thick. The R?t horizon is
<br />sandy clay loam or clay loam and is 5 [o Iri inches thick. Lt
<br />scone places thin sneaks of live occur in [he C horizon.
<br />The 13resscr roils have n more clayey subsoil and thicker and
<br />uwre distinct horizons than the 'rruck[on sods. Unlike [he
<br />Ascalon and Norm soils, Rresser soils do not contain lime in
<br />their subsoil They arc harder when dry than the Ascalon soils.
<br />and their subsoil is less clayey and silty than that of Nunu
<br />soils.
<br />Bresset loamy sand, terrace, 0 to 3 percent slopes
<br />IBrBI.-This soil occurs mainly along I~io+va Creek in the
<br />ccntt•al p:u•t of the county. Its loamy sand surface layer is
<br />G to 13 niches thick and was deposited during the flood
<br />in 103L. 'T'ho subsoil is sandy clay lo;un about 18 inches
<br />thick. Below Ibis is stratified loamy sand and sandy loam
<br />that extend to a depth of GO inches or more.
<br />Included with this soil in mapping were some small
<br />:u'uas of Bresscr sandy loam cot terraces and of wet Bijou
<br />sandy loam. Also included wore areas where the loamy
<br />sand surface la}•er is l0 inches thick.
<br />This soil has moderate available watet• holding capacity
<br />:cod is easily penetrated by plant roots. The +vater table
<br />is at n depth of about 10 feet most of the year. In many
<br />:urxs the soil material is moist 1)elow a depth of 4 feet.
<br />ilfost of this soil is adtivntcd, but crops are hard to
<br />establish.:> 1f3t11':t and otaca• llcep-rooted crops ~rovv well
<br />after they' are established. 191is soil blows easily and is
<br />low in fertility. Soil binn•iug c;tn be controlled by keepping
<br />a plant coven' on the surface and by stubble mulching
<br />+ebero sumuter follow is Used. (Capabihty unit IVe-7;
<br />Sandy Foothill range site; tree planting suitability
<br />group `~)
<br />Bresset sandy loam, terrace, 0 to 3 percent slopes
<br />fesB).-This soil occurs along major drainagewayys in the
<br />western three-falli.hs of the counh'. It has ,dark-colored
<br />sandy loam snrfnce layer about G inches thick and a sandy
<br />clay loam subsoil about 15 inches thick. A zmte of lime
<br />accumulation does not occur, but there are spots of lime
<br />below the subsoil in some places.
<br />Included with this soil in mapping were small areas
<br />of Arunn loam, of Bijou sandy loam, and of the wet
<br />Bijou sandy loam.
<br />This soil is used mostly for cultivated crops, mainly
<br />wheat. IC is easy [o work and is raldily permeable to roots,
<br />air, and moisture. Runoff is slow, but soil blowing is a
<br />hazard unless enough crop residue is kept on the surface
<br />for protection. (Capability unit IIIe-1; Sandy Foothill
<br />range site; tree planWng suttability group 2)
<br />Bresset loam, gravelly subsoil variant, l to 3 percent
<br />slopes IBt61.-This soil occurs primarily on the terrace
<br />on the eastern side of the South Platte River. Its surface
<br />layer is very dark grayish-brown loam that is about 8
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