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I'hdnru tirrir•R s
<br />ThC 1'l:itnru sorics consists of ++~I dr:,irn•rl sr,il.¢ ~0
<br />Ln 90 inc•hcs rl(•ep over gr:ncl ;uu] s:uui. 'I'hesc soils
<br />former] in alluvium over gravel]}' :Illuvium on alluvial
<br />fans nnrl 1.crraces. Slopes :u'e 0 to .', perronL. 1?Icvntiun
<br />is 7,Gf10 to S,:;n(1 feel. Natural cegetatiun is domin:ult]y
<br />Lluc gruma, ludian ricc)!rass, tint; molt])', :old tccsLcrn
<br />tcheaigrass. 'fhe average :uumnl la'ucipit:ttiun is about
<br />S inches, the mean annual air temperature is nLout
<br />9]° F, and the frost-tree season is 90 to 105 days.
<br />In a representative profile the surface ]a)'er :old up-
<br />per', inches of the subsoil me rLu'k gra)'i.eh Lrotvn
<br />lonm.'fhc lotcer 1] inches of the snbsnil is darli hrutvn
<br />light ehp• lnaln. The substratum is about R inches of
<br />dark Lrutvn eery grat'clly lo;un Deer verb' gr:n Illy s:utd
<br />that estenrls to a depth of 60 inches ur more.
<br />These s+tils are used for irrigated crops and fa•
<br />range.
<br />R!'presc•ntati+e profile of 1'hlluru loam, 0 to 1 j+r_rcent
<br />slopes, 900 feet east ;aid 50 feet south of the norih,cest
<br />corner sec. 36,'1'. 37 N., R. 7 E.
<br />Al-0 to -0 inches; light lrro+cnish ~-t'ay (]OY P, fi!^_) lirht
<br />loam, dark gt :lyish bruton (]01'R dj?1 moist;
<br />m,odrrate fine bra nular =: n:rfure; soft, v,~ry fri-
<br />able; 5 p~~trent bra ocl; ralr:n .•nu c; mod•: ralely
<br />alkaline; cllar:ntradh Lou ndar}~.
<br />B] --0 to ~ fuehrs; light Lrmcni=h gray (lost: f/2) Lraor
<br />loam, dark cr:,cish hroccn 1Ntl'R 4!`?) toot st; x,~ak
<br />medium suh:uigular blorhe strurhnr parting to
<br />mr~derntr mwlium t'Imnular: slight]>~ hard, cen'
<br />friable; a frm' pfd rh ~' elat' films nn =n,ar pods; 5
<br />percent gra eel; r;+lr:uenus; nu•dr~rnl^Ic olknli ne;
<br />stoat sn'~„lh h~ni n'!arc.
<br />li°-t--i In ]~-~ inches; In men (101'1: .`•G;) li~hl ,I;,c h~;un•
<br />Mark blown (iL}'g •113) moist; umd~ralr medium
<br />pt io-mal it st rurlurr p;~rliur to :u~,dri alt n.•,lium
<br />s oLa n u!;u' Llork c: tr,rc L:u~d, Gnu; thin palrhp
<br />slat film= on pr+is and in r'•nl rhanu~ds; ;~ p••n col
<br />gravel; ral.~a rrous; mod, cal rlc a16aLne; gradual
<br />tt ac7 hm:nd:n~c.
<br />B.3ca--]~ ip 1S iii, hr.; Invu^ Uu}'P. .i.'.'i} li•~ht ,~la. k,am,
<br />d:u~k hrotcn (]III~P, -0i"1 innist; urak medium
<br />sit L;i •t,.ular 61nr1,~ =l rnrturr~ ern' lei rrl, frlahlc:
<br />thin patch)' clay films nn p••.I<; disrnuliutmuc sloe
<br />films in root rha ~Url ~; 7b 11+•rrrat grit rl; cisihle
<br />=ecnndary ralcinm ra rL,malr n'~rut ri uf• s conere-
<br />ti„ris mld as coatings on :: r: n'el; ra!ralrnug; load-
<br />rralrlp alkalii~r; Gradual scat ~~ I„~ondarv.
<br />Clra-18 to 2G inr hos; In ova (107-]; Si3) trrp Brat Illy
<br />4oant, dark Lro+rn 17iiiR 9/3) in'~ist, m;asive;
<br />]ia rd, fri;, Lle; f,(1 pct root gi:n~el; t:sildc x'..mnlary
<br />r:'~lciunt ca rLunalr o,'rm t'~u~ as nm,y clions in thin
<br />s'~ams and .c:ira Ls and as ~„dings in fhr gt;wel;
<br />ra r:u WOOS; rindrralr•ly akaliur; f•r:ulu;d tcmy
<br />h.•unda rt~.
<br />]IC"ra--°_G to f(I inrhrs; ten' I; ra'.'rllt' ea nd; civi Llr s~•n anj.
<br />arc calf rum rn,l~,~.r,tc o,r„rring as .naturvs an
<br />rn:, rsc fravn,nts.
<br />'fhr .4] Lo riron is 3 to G iurLr•s Ihu'6. In rnlti~. at~•d areas,
<br />hOtrcrcr, ll is slight] ~' Ihi.~ko r, It is rlae Le,m in snuir In~d•ms
<br />in rullicatrd Grids :uul is sandy Inam in emnr :: eras of
<br />range. The li?f hori>.On iP 8 in 1? inches thick. The .4 :uxl
<br />R horizons art 3 in nL l~, a'cFnl Feat el :uirl in Solar auras ]II
<br />prrernl ,ohhh•s, r)rpih to Ihr ;; rot r!Iy 11C L.~r izon r:+ncr~
<br />from "P to IO iuchrs. lirpth to ci SilJe liner r:,ngrs fnnn ]U
<br />In AO iurLes.
<br />Pa.1--Pl:+Inro Inam, tt in 1 pr'rrrnl rlnprs. 'hhls
<br />negrh' level soil orcltpies alluvial f:+ns;tloug the tcestern
<br />ed~ of the vnllec and terraces along Lhe P,io Graurle
<br />tt'est of Del Norte. The profile of ]his soil is the one
<br />described as represent:+tice of the series A1,nni 1D per-
<br />ccnt of Il;is unit is inclwlorl ;ur::S of Gra)'l~nint ;;Iat~ellc
<br />sand}- L,:,rn and :; )u•Irru( :u'cns of )]rrrirk rulrbk lo;un.
<br />Runoff is slat+'. 'the oration h;¢;u'd is slight.
<br />This soil is used fm' irrigated pnf.atoes, small gl:ain,
<br />alfalfa. ;iud vegetables and for rang*e. Capabiiitc unit
<br />Ills-v irrigated, \'lls-° nnnirrigatod ; \tounlain Out-
<br />o'nsh range site.
<br />I'n IS-I'Ial Imrut. 11., 3 I„•rnoti •Inpr•e. Tllis cerp
<br />prnll}' slnpir~nil ucrupios nllut'inl f:uls alnnl; tltc
<br />tt~~~clrrn r•rlj•.e r.f Ihr t:dle>~ :uul terraces ;don)C the
<br />Pio Crandc u'cs1 of I)c{ Nnrto. ALuut 10 percent of this
<br />unit is included ;u'oas of f~rarpuint. gr:+voll~ s:un})- Vunm
<br />;nut nbuul. i pcv'cc•nt ;urns of 1)crrick cnLbl)' In:un.
<br />T',unnlf is nu~dea'a1e. The erosion hnr:u'd is slight.
<br />'I'bis coil is u~'c•d far irrigated pnL•Itucs, small grain.
<br />;mrl alfalfa ;old fur range. Capabilit}• unit ]I)e-° irri-
<br />gated, ~Ils-2 nunirrigated; viuuntain Out\eash range
<br />rile.
<br />(lu:nnun $rrics
<br />'fhr Qu;nnnn series consists of sr,met+'hnt exce~sieely
<br />chained coils 12 to ?:i inches deep aver gl:']cel and sand.
<br />'these soils furn}ed in gracclh' nlhrvium un broad a]-
<br />lucial L•uls, Slopes :+re 0 to 1 Imr~ eat. 1;let';Ition is 7,G00
<br />tr. ~.;f10 fo.cl. Vninral tcgeLltioll is rlnmin:ulih' blue
<br />gr:~ma, lute r:ILbiL'Jruch, and Indian rictgrass. 'flee
<br />average :unmal Inrr'il~itaiion is about 7 inches, il7e
<br />mean annual air tempcrlturc is abutrt 91° F, :nut the
<br />frost-frr.•e season is 90 to I(10 clays.
<br />In a repre•senlnLice profile the surface layer is dark
<br />Lru++'n gra•:ellc clurlt' loan] about 5 inches thick. The
<br />un~lcr])'ing material is ll inches of dock Lrott~n ;;rave{h•
<br />=antic In;,m ut'er t'cllutt'ish hrotcn eery grnrelly sand
<br />Lhni estenrls to a ~kgtlh of fi0 inches ur more.
<br />1'enncaLilit\' is mnrleratel>' rapid, and the av;]ilahle
<br />triter capacity is loft'. T',eaction is moderately alkaline.
<br />The e(feclit'e tooling depth is IP to '35 inches. 'fhe
<br />v; ;+t ca' tal~lc fluciuntes bcitce•cu depths of 3G ;tad 60
<br />llh Ices.
<br />fLc~c ~r~ils ore used for irrigated ca'ops :utd fm•
<br />l a ~ r,e.
<br />l;rluo.(•niatit~c• Irmfilo of Qiunnun }rrat~ellc sandy
<br />Ir~;rm, lP(1 f+~et. tee=t ;Hui I.:10(I f~'et south of the nm'th-
<br />r',st rr~;'ncr s.'c. 1R, 'f. ~t0 \.. 1;. R E.
<br />Ap-- 0 in .i inrhu=; Lt oleo (1rISR 5/3) gr:~crlle s-Hole lo:%nr,
<br />i:n'k Lent ^ 11 r~) 1: 1/3) motet; moJ• tale fine
<br />G ra :u~b,r sl curl^re; u,ft, eery frialdc; 30 pcrcrnt
<br />c: at'rl and rohLlcs; =1i_hlly ralr:u~cnus; moderately
<br />:dknlinr; gr:u!ual ..m,~,.lh hnm,dan'.
<br />C'] 5 to lfi i~irLrs; irr'•tcn (]OYR v/3) gravrllc sa n~lc loam,
<br />'l:n'1; lu,ttcn (]Ol-P. 4/3) moist; tcr~ak c.„rsc cub-
<br />oul;u!:,r h~lorkc o-lrm tore parting to 9nr ;;rnrntlar:
<br />,.oft, sere friable; 25 p'.rrrnl gr:n~nl :wd c'~I ~blrs:
<br />slightly r:dran.nus; mndrrat dp :dk;din?: gradual
<br />71 C2 -]G tr. GO Inrhrs; light yellowish hrc,cn (101"R G/1)
<br />trrg gracrlly ~-iu~l. t'lhncish hrotcn (IGIR 5/4)
<br />uini sl; sinAao 1: roinrd; loner; C7 p, rr~~nl gra eel and
<br />cnP6lrs; cab :rr~„us: u~od~•r:,trd ~~ a1l,alinc.
<br />'fhr .4p hnrirn^ is 5 to 1(1 inrhos thick in tultirOt~~~l an nc.
<br />'f l•r. ro,drnt of ,na rsn era, mriil ~, din ninai~t ly era t:~l. r:rngrs
<br />from ]v 1n >'.6 pta'rrnl in the .4 h.a'iron :nod from 7rl to .^,~
<br />I,..n rnl in the C] Lori rr•n. In s,anr :u''ara Ihr uailrnt of
<br />n~Lhlrs is as mu!h as 10 pct rent. Coa rsr frOginrnls in the
<br />IIC horizon are dominantly grncel.
<br />1)a~---(luaun,n ^ratt'llc s:nnlc In:un. "1'I11G 11C:11'I\' 10001
<br />sail ucenl,ics the ]ntt'er end of Lrn;ul alluvial fans.
<br />~~,ninh in the nnrlllrnstorn lent of the :1rca. Ch~h,ec are
<br />~ to 1 prrrent. 'fhe tt'ater ]able is erenerallr ;li a riepth
<br />of ^G In f, inches and is higbost in summer. TL is man-
<br />ipulated by a scstem of cb'ains :nxl ehecks.:lhout 25
<br />percent of this unit is included areas of Norlc gl:nvell}'
<br />sand>' lr+:m] and 1.; percent areas of Dunn] cnbUiy' sand)'
<br />loam. :'1ko inc•lurlcd are small areas of San :1rLracio
<br />sanely loan].
<br />l;unolf is slots. 'fhe soil Llnu'ing haz:ud is nlrtrlcl:lte.
<br />'this toil is used mostly for irrigated crops, chiefly
<br />potatoes. Other crops are small gain, alfalfa, and
<br />ce;retable;, Snrnc small areas are used for range. Capa-
<br />hilitc unit 1\'s ° irrigated, \'Ils-7 nuilirriga{ed; \loun-
<br />t;+in Oultcash range site.
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