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nFr.TA-~[paTROBE AREA, COL~RAnO
<br />av.c atz nt.a vtrg cc:an Nom znizzian
<br />This soil can he irrigntefl successfut[y. Because of its
<br />position on the landsvnpc, it is likoly to be morn saline
<br />rhau the other Billings silty clay looms. Sheet arosion
<br />is not a serious hnznrcl, but p,pin„ in. (Capability trait
<br />~'I5-1 nnnirrigateil; ITs--1 it•rigaled)
<br />Dillintas silty clay loam, 2 to 5 pet•cenE slopes lBga) -
<br />This soil ocetus ott t.hc ceutt•nl nnrl upper ports of al-
<br />hteial fans. Tt has a profile similar to the one described
<br />as tcpiail of tltc Billings series.
<br />This soil run l,u irricatcd, hot it. is less u~lll suited to
<br />irrigntinn tluul the more nearh• Icrel Billing soils. In
<br />many ~>lacee it is scvecely gullicd, and pipin!~ is cmm~tnn.
<br />(Culuuilitp unit VIs-1 nonit•ri;;atedg IITo-.3 irrigated)
<br />Billings silty clay loam, 5 to 19 Du-cent slopes iB9G1•-
<br />1'hia nail uorntallp iz nt the tipper ed;,re of allttvuLl Puts
<br />and sign; small. stream;, It has a profile. similar to the
<br />one rlcscrihed as tvpicnl a[ the ]iillinys series.
<br />This Soil is vaerl primtuilr as native range. It 15 not
<br />used cstetLKively for crops, •beclul5e of the slope, sctvere
<br />rrtniat huat'd, and the 51nvr pcnctrttinn of moisinre.
<br />It is stlsccPt.ihle to set•ete ranuon and is r tllied in many
<br />Plnrrs. (Fapnhilitt' nttit T-IJc-4 nonirrlgatecl; Id's-2
<br />t rn;;,tted)
<br />Billings silty clay loam, navel sultstrntum, 0 to 2
<br />percent slopes IBhA1.= Chic wit (v1M1Y5 n.r thn outer edpte of
<br />alluvial fans. 1 t his IL profilo similar to tho our, dc:ua•iL,ed
<br />as topical of thn Billings srrir5, hut. it, nveclies sand,
<br />~;rat•ol, and cohl,hslonr, nr. a depot of 2fI to ~S inchas.
<br />1 he largest ncrcn~ro is along; thn n'ratarn edylr of the
<br />valley of llw ~l7ncoulpah_r'o,Itivcr.
<br />71u)Ifltlnd in map pint; Lucre small :u•r~LS ihnt hnt-c n
<br />vnbs4'nlum of tet;v ~Invcllq onrl.h iuau•ad oC ro:usr. a:uul,
<br />~lolvol, and r.nhhlestunes. '1'hrnc inrluxiona hnvu h+ss
<br />t:gJid sUUsnil llrniua;;n t.liau U« reel. of Ihin mapping
<br />^nit-
<br />rl'lli~ in a utndcr;dvly p,rodurlivr. soil. Tt. is uscll as
<br />r;Lrlnr, nr a. in•i+rafod cropland, 'Chr, co~u~c-tcstured
<br />SId,.StY:tl ltttt prOL'lllr5 111DIY! l':Ll,hl 511118011 (l1'ainagl: thilll
<br />i. tvpinnl of Billing silty chty lo:uua. ].'ipin~r*, iti not
<br />n har...rtl. (Cnpability unit. `rTs-1 nouirt•ignr.nd; Ile-1
<br />irri„ated)
<br />Billings silty clay loam, shale auhstratum, 0 to '~ per-
<br />cent stapes IBkA).-'i'bis so)1)s vn the ports of allucinl funs
<br />Lcherr. sh;+to hods lie close to the sm•fnce. IC has a profile
<br />similar to thu one rlcncribed ns typical of the Billings
<br />,cries hot is uudcrlnin by shale Ueds at a depth of 20
<br />l0 50 iueltes, 'Chia soil occat's thrrnv„Itottt, the Area but
<br />is most c~n:nsico ease. of the LTneompnhgre River and
<br />north of 11u: towlt of blotttmsn.
<br />T111S Spll J6 11tilYl :15 ranou or ns in•i„!nt.ed rmplnnd. It
<br />is less woll ,sited to ilcrp-ruotecl cax,ps and n1cluLrd fruits
<br />than. tltc deeper 13illinr~s :115. The S1lalC 1tedS r(.5t11Ct
<br />subsoil drainage, and unless thi.5 soil is carefull mqn-
<br />n~ed, xaademte 5.ntinity i5 likely to devclo». Yipiu$
<br />rencYally is not a haravd. (Capabtlttp unit VIs-1 son-
<br />irrigatcd; T~'~3 irrirmLtcd)
<br />Billings silty clay loam, shale substratum, 2 to 5 per-
<br />cent slopes IBkB!•-This soil is on the parts of alluvial fans
<br />where shale beds lie close, to the surfscc. It has a profile
<br />i similar to the one described as typical of the Billiuge
<br />series but is underlain by beds of shale nt n depth of 2t
<br />1 to 50 inches. Tttis soil occurs Iltroughout Clte vallep=.
<br />. of the Unr..ompaltgre River noel the Gulmisvn Ricer 1Lnc
<br />snnrr3l
<br />9-
<br />is moll extensivo cast of the 77ncompnltoro Ricer and
<br />north of the town of lfontrose.
<br />This soil in used principally' as ruhre, but sown areas
<br />ore irrigated. If lt'lM1gtlted. Lt berume5 saline in many
<br />places ass 1•esult, of rfnlrielyd subsoil dxautag<,. 'Chat
<br />loll requires careful management. pt is susceptible to
<br />5m•err, rrosion, but piping grnrtnlly is not n hau:ud.
<br />(Cnpability wlit F7s--7 mm~rrtgaterli I'(re-1 irr'i~ted)
<br />Blanyon Seties
<br />The soils of the Blnnpvn arn'ies ors deep, modcrntely
<br />line tcstural, and strongly developed. They arc grass
<br />]nod soils thaC occur nt. Lhu bottorn of small valleys or
<br />in cmtcuve clraiua.gcwnys. Theyy formed in uniform, fine
<br />te~tlu'ed, micafxous alluvium clcrived from ;,tnei5s, schis6,
<br />glacial till, and serliment:uy rod:. Sails of this series
<br />nrcnr ns small urea, in Iloshvick Purh, cast oP the tv\crl
<br />of lloulrose.
<br />lilanvm 5oih have a pinkish-rma• to dntlo-bt•n:cti,
<br />„unuliir surface soil 5 to li isdu+r tliick. They' have a
<br />btrotrn or dark-brmrn subsoil of silty clay that tuts strong
<br />pri.mntir.:wd nn~uhu• bla:l:y slrmatur•. The substratnut,
<br />holnu• a depth of 3n to -kU inches, iv piukish~,Gt:•ly of
<br />6fY,wn, cnlcareotts silty chlc in abirh calennn oarbnnafe
<br />has accumulated. Isrdroclc nm'mally orstn•s at n depth
<br />of fill lochs, or mote.
<br />Thnaf:5uils are unt dixt.inrtly nlottlod or Glcye<I, thmn~h
<br />they han•n model^ttcly slutY sm'fnr.r, d1:Liliu;n: and stun'
<br />pi'rmMtbilit.}'- '1`lu•.c :u-o not hifihly susa+}qtiblr, to erosion.
<br />1'hr. nl"~iUW: Illllltel' rulltnllt IX III(MIClatr.I•}' hil;h, and ilia
<br />sl rurl.u rr is tit alrh.
<br />'I:yl,iral prolile u[ Rl;uit•nn silly clay loran, 000 feet
<br />unrlh of Ihn Noulh+•;lyr rornvr u[ eer. 11, '1'. dp N., lt.
<br />F SP.:
<br />Al -11 to li iucLen, Niti.Y c1:p' h11tln; pinlf iah flu)' (i.Gt'n fi/3,)
<br />,vhr^ +lry, lL,rk bn,Jru Ir..tl'It ~!/':) n•ina, na: ist;
<br />nmdcrn[t•, Ilan, gnuniktr Pl rnutnru; alight ly hnrA
<br />+clnm dt'3•, Yri:pJn e'han tn~+ial.; unw•al rnren na; pS[
<br />i91 };PnQtlal, Fnn,nlh bullb:la l'y.
<br />I2°t~l lu :.D inches, slltY else; 4ru+ru fi.u t'R ~:%=1 n'b,`n
<br />dq'. flllrlt bro\Yn (r,i,rn -0/'.1 n'hop moi+t.: lllnn-
<br />' crate, c~~arrti. Priaumtin alruCtu n+ IuY•rtklnq to elrnng,
<br />mwliuui, nllgtdnr block)'; L'prp Ira n! ,+'llgn ,1 ry', flrnt
<br />L,9mu ravine; thin. 'ennlinanna flay nlnul; nnnratt-
<br />rnnr,us; III i.4; gradual, snumul bmmnn ry.
<br />I
<br />Cca~O In Co iuN,rs. nllt>' clay; pinkish gray (i.GYR IiJ?1
<br />trhen dLT. bnnru I i:,YR G/S) ahcn mule[ ; masaivx;
<br />Extnentely 11n1•d when ncy, +rory Plnatie n-Len +cet;
<br />fete L`UttCrCtlOn(i of l'a1CiUln r, rhn,tnLC; f2k:1[CaLLA;
<br />tln y a.
<br />In n few Wrens these Soils are more poorly drained
<br />than tpppiral and bare brightcoloted mottles star•cing jest
<br />below the surface laver. Lt places bluish gleyccl hvriznuls
<br />occur beloty the subsoil. Whe>~ these soils adjoin de-
<br />posits of ~*lacial till, thev may have n thin mnrrle of
<br />grovel.
<br />Blanyon soils are finer tetlatred than Bostxrick soils,
<br />trhich they 3djnlll, and have s lighter colored auriane
<br />taper. Thep ore nonculcareous Co a greater depth than
<br />Colons soils and hnvs a more strongly developed sub-
<br />soil.
<br />'{Pesters whentgrass, stet}der wheatgra55, 6asht wild-
<br />. rye, suet 5gnirtrltail at'e the principal grasses, but big
<br />sLgebrush and rabUiLhrttsh farm n brushy cover ut soritc
<br />xa.ru'gn vnan acnxr.amm
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