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PROVERS CO[7~-1'Y, COLORADO _~
<br />under irrigation in areas that have been drained. Some
<br />Las soils, ltotcever, are difficult to drain because they are
<br />claccy. Las Animas soils are stratified, sand}•, and if
<br />drained, are very droughty. 't'hey are used mainly for
<br />ran_e consisting of native grasses.
<br />'f he Ulendice, Havre, lun•unlan, Lincoln. and Ilorky
<br />turd soils are well drained to escessit•cly drained. The
<br />Glendice and ICornman soils at•e sandy and have a low
<br />mnishu•c-holding capacity, but they arc cultivated tinder
<br />irrigation. The surface layer of the Iulrnnlan soils is
<br />deeper than that of the Glenslice soils. The Ilacrc and
<br />Rodsy Ford soils arc linty and mediwn teshlred. The
<br />Ilacrc soils occur on low terraces ;uul hate a thin loamy
<br />surface layer ;old a subsoil that is strati(icll teit6 sandy
<br />material. Tbo Rocky Cur<I soils 6aco a thick, moder-
<br />ately fine teshu•ed surL•Iw layer that consists of material
<br />brought in by irl•ig;tlion water. The Lincoln soils occur
<br />along the stream channels and are likely to be flooded
<br />freynrntly. They arc very sandy :uul gt;lrelly and in
<br />must areas are covered with grasses, tamarisk, and cot-
<br />tonwood trcrs.
<br />'1'hc Las, Glcudice, I[ucrc, I~urnman, and 1{ucl:v Curd
<br />s~ih produce all crops soiled to the aryl, including
<br />aIL•dfa. beets, corn, sa•ghuul. small grains, onions, and
<br />melons. 1'he principal prublmus of m:ula~•emcnt arc
<br />h;uullim~ irrigation venter, maintaining fertility, rednciug
<br />sllt:Ulull, Illlhl'Ot'Ille lhalllagC, allll l'OCCCCtlilg SAllllll\'.
<br />8. Arvada-Pultney-Minnequa Association
<br />d/odrrately deep soils o~•er thinly bedded limestone, an<l
<br />.shale
<br />Phis association occurs on gently sloping and moder-
<br />ately sloping uplands in two small areas along the
<br />western edge of the county.
<br />:\rt-ada, Pultney, and Minnequa ore the main soils,
<br />Imt there is also a lar¢e acrca~c of \fancel ,oils and
<br />smaller areas of Tcrouc and Penrose soils. Fib Ire 7 (p. ~)
<br />shows the main soils in this association ausl the under-
<br />lying material. The Arvada soils occur in concave posi-
<br />tions rot the more gentle slopes. They hate a clay loam
<br />surface laver and subsoil. Tile Pultney, Jfinnegtla, and
<br />\fancel soils hate a loam surface layer and a loam or
<br />clay loam subsoil. Tlley are underlain by limestone ansl
<br />shale. The Penrose soils occur ou the tops of ridges and
<br />in breaks on the landscape. 'Lin
<br />surface, in fltese soils, or it crops out
<br />Dtost of this association is m ral
<br />grazed, though a small part. is .dry
<br />farmed areas are highly susceptible
<br />erosion. Yields are only fair, even
<br />most favorable, and the risL of crop
<br />9. Baca-Campo-Riley
<br />Deep, moderately fine textured, gent
<br />Deep soils that developed in loess
<br />most of this association. The associ
<br />in the southern part of the county.
<br />ggently sloping in most places but is
<br />drainageways.
<br />The Baca, Campo. and Ailey soi
<br />in this association, and the fort Co
<br />small acreage. The Baca soils mal
<br />the association. The}• Mace a loam a
<br />layer and a clay lo:un subsoil. The
<br />clay loam surface lacer :old a heat
<br />They occur in concave positions
<br />slopes. The Ailey soils generally
<br />sloping areas and pace a silt loam
<br />silty cloy loam subsoil. The Curt G
<br />slupin, and occur along the edges
<br />and along some of the drainagewu}'s.
<br />Jtust. of the acreage of rbe Baca a
<br />about half that of tho \\'ile}• soils, is
<br />and sorghum ;ue t he main vmps. an
<br />a sulallcr acleage. 'Ihe risk of cr
<br />great as on the Riley-Colby associa
<br />farmed ate iu tango consisting of nat.
<br />acreage is irrigated by u•nter ft•om tl
<br />voir and by n•,tter pumped front w
<br />The mom problems of m;ulagcr
<br />wind el•osion and couset•cin;,• muisl
<br />must also be controlled in sloping ;u•.
<br />Riley soils arc highh• susceptible t.
<br />main pmbleuls on irrigated soils a
<br />lion water and wninfaining fertility.
<br />Descriptions of the Soil:
<br />In this section the soil series iu
<br />described in alphabetic order and
<br />described for each serie=_. h:aeh ss
<br />and those charncteris[ics of its prod
<br />from those of the typical profile are
<br />otherwise indicated, colors describes
<br />soil.
<br />A detailed desct•iption of a prod
<br />each series is given m the section "G
<br />and 1\Iorphology of Soils." Tern
<br />describe the soils ansl that may m
<br />reader are defined in the Glossary
<br />report.
<br />The approximate acreage and
<br />of the soils are shown in table 1,
<br />shown on the dettilesl soil map nt tl
<br />. ~ - ~..-l.' 4 -
<br />_'. _ _. • J tt=
<br />`-:,. ~: -
<br />estone is .neai-tTie--=-.
<br />in many plasxs.~:, y~r='~~
<br />ge grasses that are
<br />farmed. The dry='"` ~! I°.
<br />to wind and water' `=~`-`
<br />when the weather is' ;=.~_,
<br />failure is great. - . -- . ;
<br />n
<br />y eloping ao+7s
<br />m uplands make up - -
<br />tion is in two areas
<br />It is nearly level to :;
<br />;lightly steeper near - ;
<br />s are the main soils
<br />tins soils occur in a
<br />e up about half of
<br />Id clay loam sut•face
<br />Campo soils hate a .
<br />~ clay loam subsoil.
<br />n the more gentle
<br />occur in the more
<br />surface layer and a
<br />Ilins soils arc gcully
<br />of the loess mantle
<br />f Guupo soils, and
<br />}• farmed. 11'hcat
<br />~arlcy is drown on
<br />failure Is not so
<br />m. Areas not dry
<br />' grasses. .\ -I~clll
<br />Two ]lutfc; licscr-
<br />nt are controlling
<br />rc. ~\'atcr erosion
<br />s. The dry-fal•med
<br />wind erosion. The
<br />maltaglllg ICI'lga-
<br />'rowers Colinti• uto
<br />t typical profile is -.--
<br />1 is then discussed,
<br />e that are different
<br />>ointed out. Unless . --
<br />are those for a sly
<br />that is typical for
<br />nesis. Clas~ificltion,
<br />that are used to --
<br />be familiar to the
<br />at tits back of the
<br />oportionate extent
<br />d their location is
<br />back of the report.
<br />77.-I83 -GG-_
<br />Figure S~Irrigated 5eld o[ Roeky Ford soils in soil association 6
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