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<br />TCC--Collbr~..-Collbran Variant compler., to 6 percent slopes. -
<br />i terrace.. Elevati•.. , iui , ini
<br />TI~ i =_ rnaF• urn i t i =_ or. up I ar~•is an• ,r. i s E 4. tc• 7 4. .
<br />fee+,. The aver'z•~e annual .p•r'ecipitati~~n is 1] t.• ]6 ir~ct~es, tt~e
<br />average annual air- ternF•er-atur-e is 47 to 5 degrees F, an•i tY~e average
<br />fr-i~st-free p•er'i~~~i is Bari tc~ 1:F •iay=_.
<br />This unit is 46 percent C~:IIbr'an clay barn on uplands ar~d
<br />terrace=-, and au F~ercent C.,I It~ran Var-iarrt barn t•n uplands and
<br />terrac?s. The cr:rapc•nents Jf this unit are so intricately inr,?rmirigled
<br />that it wa=_ nc~t F•ractical tr: map tt~ern separ'ately,at tti? scale use•i.
<br />I n[IU•iEd rn th!s unrt ar-e s!~rl=_ that have sandy sut•soil .. r. .
<br />terraces ar,•i'.uF~lar~•is, p:::~r'ly •ir'air~e~i si•ils in •ir'ainagE•.,ay=_, s~~ils that
<br />t~a`;e dar-1; sur-facE layer's iri ~ir'airrageways, sc•ils that gave soft be•ir-~7c{~.
<br />sut~straturn ~:r~ fan=_ ar~d terraces, very stc~r~y a~•ila with very sti~r~y
<br />ur~drr'lying rnat?rial :.n terrace a=_carp•rner~t=_, and soils that have
<br />sut~si•il with less than :..5 percent clay c•r. up•tar~ds. Inciu•ie.i areas
<br />rnal;e up at•~:ut ,15 percent of ttie tr:tal acr-ea•~e. Tt~e percentage vzr-i?s
<br />fr~:•rn one area to another-. -
<br />~tre C:c~l Ibr-ari s:•i I is deep ari•i wel I •ir-air~e.i. It f:•r-rne•i ire
<br />calcar-ei~us, rn~:d=r-ateiy fine te:!tur'E•i eolian an~i r-ewt•r4::e•i ei•liarr
<br />material. Typically, the surface laye!- is d-arl; grayish brown clay
<br />Ic•arr~ lir ir~clres tt~icl<. Tl~e u~~F~er- part cif ttie sut~soil is yEllc•wistr r'E~i
<br />clay loam -U inches this{::. Thy lower part to a depth .•F bir irrche=_ %ir
<br />rnor-e i s l i gtit r•e•i•i i st. t~r-i~wri clay I ~•arn.
<br />• F'er'rnEat•ility %~F tt~e Collt•r'ar~ s_•il is slow. Availat•le wat?r-
<br />capacity is t~igt~. Effecti:•e r-~~„ting depth is r_.p ir~ct~es or- rni~r-e.
<br />Fur~aff is medium, znd the hazard c•f water e!-c•sion is rn~~derate.
<br />~t~r-inl~-swel I F•~~ter~tial is high.
<br />Tt~e C:ol lt•r'an Var'iar~t sc~i l is deep' an~i well dr-air~e~i. It fi~r'rned ire
<br />calcar-ecw=_, rnt•~]er'ately fine te:;tw-ed eofian and r-E•ror{.:ed ei•lian
<br />rnater-ial ~~ver'lyin•,~, cc~t~bly, gravelly and stc•ny alluvium. Typically,
<br />the sur-fzce layer is reddish t~r'owr, Inarn '~ inches thick. The Ivwer
<br />F•ar-t of tti? surface layer- is r-e~i•iish br-c•wn silty clay barn at•c•ut c
<br />inches tt~icl::. Tti? sut~sr:il is r-eddist, br-owr~ t.. yellowish r-E~i clay loam
<br />37 inches tlricl;. Tt~e sut•=_tr-atum to a depth of cU inches c•r more is
<br />p~ir~li e;:tr'ernely c~~t•t~ly sandy clay Ioarr~.
<br />F•er-rr~eability ~•f the C:~~Ilt,r•an •lar-iarrt soil is slo•a. Availat•le
<br />water- capacity i=_ high. Effective rc.ating depth is 60 inches c~r'rr~orE.
<br />f,•un:~ff is medium, and the hazard of water er-c•sion is mr:derate. Depth
<br />tip gr•a'vel ly, cot~t~ly and stony sut~str-aturn ranges fr-nrn 4i1 tc• [••ir inct~e=_.
<br />5~n-ink:-swill pot?ntial is high.
<br />Mc•=_t areas r,f this unit ar-e u=_e•i fc•r- pasture ar~d tray. A fesr area=-
<br />ar-e u=_e~i for• trc•rnesite •ievelc•prner,t arrd as a gravel source.
<br />Ir'r'iga+, .e •i crop=_ gr'ot:rr c~r~ this unit ar-e g~~ass hay ar~d alfalfa.
<br />Gras=_ tray is tt~? !r~air~ cr-~•p. If ttris unit is usE~i fc~r' irr-igatE•i cr-oF,=_,
<br />ttie main limitations ar'e is the clay Ic•arn surface. Spr'inliler
<br />ir'r igati~•r~ is tt~e rn~~st suitat•!e rrietlr~~•i cif apF•lying water'. U=_e of this
<br />rn~t:t~od p.?r'rnits tYie E•:en, ci•r~tr'c~lle•i ap•plicatir.~r~ of wat?r-, r-e•iuce=_
<br />run~~ff, znd minimi_es the r-i=_h of erosion. If Furrow or' corrugation
<br />ir-r'igatir:r, sy=_tem=_ ar-e used, r'ur~s st,nul•i be inn ttre contour- or- acr'•':ss
<br />the slope., F~•r *.he efficient application anal removal of irr-i•?atii•n
<br />water-, le`!eiir~g is r~ae~ie~i in sloF•ing a.r-eas. ,Ir'r-igatior~ s,ate!- r.?eds t::
<br />be applie•i at a rate ttrat insur'ss opt irnurn p~r'c•duction vi tt, r•ut
<br />incr-e=_=_ir~g pie?p• p•?r-c~•iatic~r~, r-unc~Ff, ar~•i er-osior~. U=_? c•f f•iF•?, ditch
<br />lin,ir~g, i•r ~ir-c•p structure=_ in i~'r-igatiorr ~iitctres fzcilitates
<br />Ir'r"laai: l4r! aril Y?dUC?° •il tCir e!-451i~n. Crop r'esidu? I?ft on .•r ~~A Elr3a
<br />t.h? SUr'face helps to Cons er've mGiStUr'e, malntaln tl lth, and Ci~n t1'i•1
<br />?rigs ir: r,. ~ Tilla•,~, a• s{~~~~u!~i t~? I.:epl to a mi'r~ir~uro. Ayp•i icati:~ns ~~f
<br />f ?rill l.E:' ~~r"C- rye E•i~•i tr: tr~alfita~n _711 ~ertlilty.
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