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<br />:01G SLP.VEF
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<br />~ubangv!ar b!oci:y s;: uc:ce; tae:, sere :ri±S!e;
<br />fr+v thin parse:} c!a}' Errs e^ peds; 30 pr:cer.t
<br />gnee:; vi s:b!e ca~cic:n ca:~bor.a;e ecru::i°~ as sof[
<br />e:asses; ~:: o::g,y e.'ca recw; r.,cde:a;el}~ a!kalir.r;
<br />clear s::too:l: b~::::.da:~y.
<br />Clca-1S to ?5 iac:.s: c.+..: b:o~n~: (LO]'F. ;.`3) r.:ois:;
<br />g: ave;ly s -d- Isar; urea'-: Fae gra-~_~.^.r s :u:r
<br />~[[, ee- ~~•~ ,.;..r ;s per cr :gra.. risible
<br />n!cic nt ca •b0::a:e cci urge r:g ass c^ssrs and is
<br />ns; s: ror.;'e r:.!carco'_s: [:~sdera;r.;: ..,kaliec;
<br />clear sn:eo:h Found±: v.
<br />IIC°-°.i to G4 i::ctes; grarril}~ sand.
<br />Ttr .4 hnri rna is : to S iac!:rs trick ar.d is sandy tonne,
<br />loa^•, e:~ light reap login. The F?[ torizon is sandy star loa:a,
<br />clay least, o: F.eary' loan:. Tire a~a;cr.: oC gravel mgrs from
<br />0 to 1~ perrcnt is the A ho:i:on and B horizons. Deuth to
<br />cisib'.r lime range; from ]5 to ;G inches. Saliri[y iangcs
<br />from rono to high.
<br />IIIs-S irrigated, CIIs-°_ r.onirrigated; Salt Flats 1;..
<br />site.
<br />San Lois Ecrics
<br />The S:.n Luis series cna;i;ts of so:neah,^t p.;_
<br />(11'allled EO:Ii 2O [J ~~) Inl'.ES deep 0': el' aaaii :iliii ;,'~~;._
<br />These soih formed ii: aliuciu:n o^ old `eod p!~,i..;
<br />[he Valley fioo:. Slop es are 0 to 1 percent. Eletati:::
<br />S,G00 to 5,000 fee;. \atural vegetation is ciomi::x
<br />~reasenood. rabbitbrush, alkali saritou. and saL•g:;
<br />'fhe average annual precipitation is about iucl:=;,
<br />u~can annual air temperahue is about -11' P, ar.d
<br />frost-free season is r0 to 100 days.
<br />In a representative profile the surface taper is c:
<br />brown sands loam about G inches thick. The subsoi'
<br />brown or dirk brot+'n clay' loam about 13 inches fire
<br />The substratum is ~ inchc; of brown or dar): bro
<br />sandy- clay' loan: over sand auil g1.aVel that exte:uis
<br />a depth of GO inches or more.
<br />Permeability is moderately slow, and the acail~.
<br />water capacity is lots or moderate. In drained areas i
<br />available water capacity is moderate. Reaction ran;
<br />from strongly alkaline to veer strongly alkaline. '1
<br />eficctice rooting depth is 20 to -f0 inches. Depth to t
<br />ivatet' table is 2a to GO inches. The soils al'e S:tll rte a
<br />alkali.
<br />These soil; are used for gauge, ~•: ildlife, and irrigat
<br />crops.
<br />P.epresentalice pro5le of San Luis sands loam, 5
<br />feet north and ?,62.i feet [vest of tl:e southeast Corr
<br />sec. 12, T. S7 \., R. S E.
<br />Al-0 to 6 inches; bro:cn (IOYP. 5/3) sandy loam, b:o
<br />or dart; bro+en (10]'I: S/3) moist; modrntr e~
<br />fine 8t'anular sh~ueture; soC[, friable; calcarea
<br />strongly alkaline; clear smooth boundary.
<br />Bl-6 to 10 inches; bt'owr. (7.i]'F.:/?) clay' loam, d:
<br />brov: r. (SS]'P. ;r?) moist; u'cak fine subac~c
<br />blod:c s:rcc.ure pa N,in' to Iredcrate fine gram:!.
<br />slighay hard. firer caeca grow; strongly alga!:~
<br />clear so: v;h boundary'.
<br />E'?t-10 to 15 incites; brot,-n (i.S]"P, 5/:) clay loan:, b:~o~
<br />or dark bro'•rn (SSFF. 4/?) moi=:: e'cak co:
<br />prismatic structure parting to [noderate n:cd.;
<br />sabar.gu)ar blocky; hard, firm; thin nearly coati'.
<br />our clay flrts on peds and in root charnels: c
<br />ca reocs; strongly alkaline; clear smooth baur.da:
<br />Baca-15 to ]0 inches; pale bro:rn (10]'F. G!3) clay' !='
<br />bro•a~n cr dark brown (101"P. ;/3) moist; fc:~ srr
<br />pi'omirer.t mottles, rrdd.ish b:~ouii (i]'f. 4/~t cci
<br />r~'eak r.:rdiu:a subangu6r blocky sh'ucture; t:::
<br />f.rn:; rhea patehc star Eire; on peds; eisibL_ ca!:i.
<br />ca:bona:e occurring as soft masse>; strong!5 r:
<br />r..reou;; eery sU~ong;y nikalin^; clear s..:~
<br />baundarv
<br />Clca-10 to ?; iacr:e>; Pale b:~o:at (10]'C G/3) sar•dF
<br />loan. b: o'.~r. c: dart; bro:an (30]'F. ;/S) c•.c:
<br />masse:r; co::tr.:on r..rr.iun: pro:::i::en: yc::•c:•...
<br />hro::a (!0]'F. ~/G] and gray (TOFF. 0/1) r:o':.`
<br />visib:~ calcixa ca: Sar:a:_ cccurrmg as so`t r.:a'~"
<br />s: ror.piy calareo:a; eery s: ronglc alka'.in^-; c."
<br />smooth haundary
<br />IIC'?-?: to GO i::chrs; calczreo:a, r.:o:ded sand ar.d g'~g~':.
<br />Th•: A F.o:i:oa is { to 9 i-ci:•;s thick an[I is sandy I=~-~'
<br />clay loan. Ica^:. er ,=an:!y clay Ica:::. L'nplo,~ed a'te".
<br />range tcpicaliy rave n grayish bro+rn A? ho:~izon =.'.'.
<br />intros tt.itk belo:•: ttr Al he:izaa. The F.'?t Ivor; zoa is S :e
<br />inches thick :. rd is reap log.^.: o: sar.dy~ clay' log:::. 7ne. (
<br />horizon is s.=.crip etas loam or bam. Fccits::goa~~rl~e:':~~;:_
<br />in the F. and C! ho:~izons ra ages from iii to
<br />Salinity ranges from Ion' to very high.
<br />Sa-San Arcacio sa[.de loam, This nearlc level soil
<br />occupies old flood )>lain? and the lot+'ef end of broad
<br />alluvial fans tlnoughout fire eastern part of the :U'en.
<br />Slopes are 0 to 1 percent. The profile of this soil is the
<br />one described as representative of the series. The water
<br />table is at a depth ranging from SG inches to GO inches
<br />and is highest in summer. Salinity is slight in places.
<br />anon[ Is percent of this unit north of the F.io Crande
<br />is included areas of \o:•te gravelly sandy loam and
<br />6luanton gravelly sandy loam. About 10 percent south
<br />of the Rio Grande is areas of Zinzer loam er Platoro
<br />loam.
<br />Runofl i; slow. The _=oil b;ou-ing hazard is moderate.
<br />This soil is used mostly fur irrigated potatoes, small
<br />grain, alfalfa, and Vegetables. Some areas are used fo:•
<br />range. Capability unit IIts-2 irrigated, ~'IIs-? non-
<br />irrigated;Salt Flats range site.
<br />Sb-San Arcacio egad} ]oamt saline. This neatly
<br />let'el soil occupies old flood plains and the lou•cr end of
<br />broad alluvial fans in the southeastern part of the
<br />Area. Slope; are 0 to 1 percent. The pro5le of this soil
<br />i; similar to the one described as representative of the
<br />series, but salinity is moderate to high because oC
<br />seepage., The V:ater table range; from ?0 to -1S inches
<br />belo4i'~fhe surface and is highest in summer. About 10
<br />percent of this unit is included areas of Zinzer loan[ a•
<br />Platoro loam. Alto included are small areas of San
<br />At'cacio loam.
<br />RmtoE is slow. The erosion hazard i; slight.
<br />This soil is used mostly for range Some area; are
<br />u=_ed for irrigated email grain, alfalfa, potatoes, noel
<br />Vegetables. Capability emits Ifis-ii irrigated. 1'I u'-?
<br />nouirrigated; Salt Flats range site.
<br />Sc-San Arcacio loam. This nearly IeVel soil oc-
<br />cupies fire lot: cr end of broad alluvial fan; in fire south-
<br />ezstern p:+rt of fete Area. Slolyes are 0 to 1 percent. The
<br />profile of ii:is sail is similiar to the one described as
<br />represe;ltatiVC of the series. bat the surface layer i;
<br />loam or light clay loam G to S inch_s thick. Salinity is
<br />slight in places. The v:ater table is at a depth o` about
<br />~S t0 GO inches and is highest iu summer. About 10 per-
<br />cent of the; unit is included arezs of Zinzer loam ol•
<br />Platoro lea; 1 anti about ~ percent arezs of \'i!la CroVe
<br />sands day-loam.
<br />Rung` is slo;c. The soil b!on'ing hazzrd is moderate.
<br />This soil is used for irrigated sing!! grain, alfalfa,
<br />potatoes, and vegetables and for range. Capability unit
<br />Yage 3 of 6
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