|
P° `t ~ •
<br />bl OltOAN COUNTY, COLOItAUO
<br />vcslern port of rho county, were uru;s of Stoneham loan),
<br />lu 5 perwnt slup4s, that w;tl:u up us outclt .LS 10 pcrua:t
<br />~] ;u;y area m;Lppal, nod suuLll ,u•4as ul' VumL s+uuly ]o:uu,
<br />U, 5 purc4nt slopus.
<br />Jn uull.ivutul liulds soil blowing :uul \valur w•usiun aru
<br />hu major har.;u•dn. 1'Viml sf.ripcruppiu~ ur sbtbblu un;lch-
<br />ug holes cunla•ul uruainn iu dry faro u:d nrt•;rs. I$rnniun n:m
<br />~u cuutrullud iu irri~alad liultls ~by pruduciu;; sw~tll grata
<br />~rhay. Capability uuitlJ_lu-1`r (irri~,Lfcd),1Vu-2 (dry-
<br />uld) ; Suudy 1'luns ruugu site.
<br />Asrtlon sandy Imun, 5 lu 9 percent slopes lAuDl.-'1'hia
<br />oil ucuur8 uu uplanda Iln'uu~6uu1. I lie cuuld.y. 111 oat :u'oa
<br />ru iu r:wgq but sunu+ numll aruus aru dryf,u•umd or ir-
<br />i~alud.
<br />1'hu sarll:cu layer and Ibc subsoil aru ImruuLlly slightly
<br />hiunoa• Lluw Chusu ul' ~\scnlou sandy lu:uu, .f lu fi pur-
<br />cut slopus. .In west pk:ccs linty occurs tlt ;L lIL'1)tli O'f 10
<br />r ] I incbus, bu6 it is w,l,y 7 m' S iuc•bca Il•um I•hu nurfacu
<br />: uanluratuly eroded ;u uas.
<br />Included itt u)1Lppiug we.rc Wrens of Vona sandy loam,
<br />to U pc+rc•cut slopes, and of Slunchaw taint, 5 to 13
<br />~crccut slupua. 'J'hu Vuua coil ucLlcan np as wool, :LS 10
<br />~a~cuuC ul' :u)y un:,t u,uppud in the uucth-cwtl.t;t1 ;tart
<br />urtheusturu parts of the cuunl.y uud is iu sump ut•eas iu
<br />!,o uorth\v4stm•u p:u•t. '1'ho SLQIICIImn Sall mnl:cs up ns
<br />arch ns G pnremtt ul' any ;era mapped iu t.hc uurthwrsL-
<br />rn pa rl, ul` I:h4 cuunl.y.
<br />Soil •Lluwiug awl walur crusiun arv serious buzut'ds t
<br />,tltivnted areas. Iu dryf;u•med fields stubble nuilchin
<br />des cuutrul crusiun. Rruaiun cnu bu unttrullyd in irri-
<br />alotl :u'uus Eby snucliu~ plnula I'ur pnsturo ur hay. C:L-
<br />abilil.y mill. IVu-1'3 (irri~;dod), 1Vu-5 (dryl;uul);
<br />audy 1'l:rins range site.
<br />Ascalon-Plutnet• sandy ]aims, 1 In 5 percent slopes
<br />\v0).-'1'buau soils occur uu uploads, wusl.ly iu l.lw uurl.h-
<br />tsluru port uC Lbu cuuul•y. '1'huy aru su iutcrmin~l4d
<br />mt awl: coil ,vas Iml. uuy,pul supurulely. '1'ho Asculou
<br />uuly loam mnlccs up 70 pcrucnt or more of the mapping
<br />air uud is siutihLt• to Asr,;duu sandy loam, 3 to G pm•-
<br />nit slopus. 1'hd.nur hllu Hlllld•y IOItI)1 nuVkes np rho rrsC.
<br />w•cul~ uu alupLS of 0 to ~; uw•cuul• uud is suuil:u• t.u
<br />;c 1'luUtar lino s;uuly ]oa.m described for the Ylnt.llel'
<br />'1'145. '
<br />Soil blowiu~ and \v:dcr w•usiuu :Lee th4 wain bar.;u•ds
<br />+cullivatud ;wens. Lt Lb4 dryt'armed areas wind strip-
<br />~oppiug mul stubble nntlchin~ help control erosion.
<br />rate of this mapping unit is u•rtgnted. Capability unit
<br />de-2 (drylmul) ; Sandy Plains range site.
<br />lanlcard Series
<br />lu tbo Bmtlmrd series are sandy or loamy soils in allu-
<br />um that \vns rwently deposited on bottom lands along
<br />)0 lllalOl' Stl'G11119 Of t110 COllllty. '1`IICSO soils aru nearly
<br />eel to lwmmocky and in phtces are cut by strmLm chmt-
<br />:Is.
<br />The surface ]nyer ranges from loam to sand. Sand or
<br />mixture of sand nod gravel uudcriies tbo surface htycr
<br />ul contains thin discontinuous scums of n finer textured
<br />;ttet•inl.
<br />13mtl:nrd soils are well drained to excessively drained.
<br />boy absorb water rapidly abut have poor water-holding
<br />pacity, blooding Crow Cho adjncmtt streams is likely,
<br />;uul _~ruuud \nttcr is generally \viChin 15 foot of the sur-
<br />I'acc.
<br />]i,uilintxl suits uro nuistly in pasture, but corn and
<br />all'all';L aru ~ru\cn uu Ch4 leas a;uuly soils. 1 icldn ;u•u lu\v
<br />bcuwsu Llwsu soils aru sluLllo\v ;uul hnv4 .lee' autm•-
<br />huldiu;; cupauity.
<br />Ilank:u•d s:uuly loam (Ulu,; pcLrc.uf.sluprs) 16x1.-'I'bis
<br />nail ucuut~ wt the butfuuL bards :Lloug 6hu SuuIIL J'lutto
<br />ltivm•, ]iijuu CrcuL-, uud I>;iowu Ct•eek. Slopes of 1 por-
<br />tent or less aru dominant.
<br />'.l•hu surl'ncc. Inyo.r, :dbuul. G In S iuubuti Ihick, is sandy
<br />laity. 11. is undarlaiu by gaud ut• snud cut( nr;n'ul aC a
<br />depl.h ul` 5 lu 15 iuchca. 7'h4 snr.l';Ltu layer Is uurw;;lly
<br />liwy, uxcupt iu suu)4 nruus alum liijuu Crcuk.
<br />lnuludod iu nmppin„ •Lluu~• the South I'latt4 ]liver
<br />\vrru n I'ow anmll arms Ihnt Lava a tun n; au rl4tco l,Lyur.
<br />Also inuludod \\•4ru nrces that have n cunrsu a,,udy luau;
<br />nurl'nru layer.
<br />'1'bia soil is nut e'cll suited to irrigation. It is slinllow
<br />to sand or nrixal sand uud ;_•rnv41, and flooding is likoly.
<br />I I' il. iv irrig.;lcd, suilabl4 crops aru nll'nllh ur ^uul.liur
<br />clunu-~ruu•iuh crop. 'Phis soil is trot suiL;Lbl4 1'ur dry-
<br />I'~nrmin~. Ca1r,Lbility unit 1Vs-18 (it•rign~lvd), \'I\c-;S
<br />(clryl:uul) ; not cl:rssifiod as a r;ulge situ.
<br />I3anlmt'd soils (0 to G percent slopus) IBkJ.-These soils
<br />nccut• n •Lihly ou butlou • lump Lhu Suullt 1'lallu
<br />,.' c Ilan (,ruck.
<br />Thu surl';;cu layer is G to 10 inches of light-colarec
<br />sung in most phrces, bat swill Wrens of lonuty sands
<br />u~ir. 1';xcepL in places alwi~ llijuu Crcok, (hu snrl'acu
<br />ln,ym• in linty. Thu rata of valor inlnl:u is inure rapid
<br />Lh:ut LhaL of ll:utk;u•d a,wdy lu;un, and the \ViLI L'C-IIl1IlIll1~
<br />capacity is lo\\•ur. Soil bhi\viu~ is mono ]ilccly.
<br />Thin soil is out snil.nblc fur cultivatiuu,'bccnusr, il. is
<br />ah,Llln\v La s,uul or ntixctl sand :uul ;;rnvul :uul is sus-
<br />coptiblu to hooding •Lnd to soil ~bloe'ing. Cnpubilil.y
<br />unit VII\v,1 (dryland) ;not clnssiliui ns li run~u site.
<br />BI]Oll Sel•ies
<br />'.l'bu liijuu suriu~ cuusiats ul' ~bruwn, dcc t lu uunlcrnluly
<br />deep, loamy and s;uuly soils that forma ou terraces in
<br />uunc,Llcnrcuus, ,u•Icosic nllnviuut. '19tu sahslrutuw v;u•ius
<br />iu luxttuv. 'L'hcsu soils aru normally well drnined'bul. ,Lee
<br />uscuasivcly drained in places.
<br />The surface layet•, about S to 17 inches tbicl:, 1'a I1;pO8
<br />from brown to light,bro\L•n sandy clay loam to lo;uny
<br />sand. It is free of ]Iwo ;utd c~usily wm•Imd. 'J'o Lho
<br />dcydlr uwvudiy ilo\ved, tltie ]:Lyur has w4;d:, lieu, ~r:unr-
<br />L•u• structure ur is single grained, but below plow depl.h,
<br />it generally has weak, co.•Lrse, blocky structure. The sub-
<br />soil is Iltt•own to dart.-brown, limo-froo sandy loam or
<br />cu;u•su sandy ]onto 10 to 15 inches thick. It ]nLS \ve~Ll: to
<br />ntodcrnto blocky structure attd is very hard when dry but
<br />friable when moist. The underlying material is nt n
<br />depth of 36 to 50 inches nod consists of light yellowish-
<br />btrown to ulivu-brown, lime-Ergo loamy course sand uud
<br />sand.
<br />1Vnter is taken into the surface ]nyer nt n rapid to
<br />moderato taLte, and its movement tln•ough tho subsoil is
<br />rapid. T'ho \vatcr-holding cup;rcity ranges from lo\v to
<br />uunlmiltte. (i4nw•nily, natural fertility is uunlcr,rle. Soil
<br />
|