|
PHILLIPS COUNTY, COLORADO l9
<br /> Ap-0 to 5 inches, grayish-brown (10YR 5/2) loam, very Clark Almost all the acreage is cultivated. The soils in this
<br /> grayish brown (10YR 3/2) "ile>l moist; weak, thin to 0•11011p are well suited to winter wheat, barley, sorghums,
<br /> very thick, platy structure that breaks to wenk, fine 5 ,
<br /> granular; hard when dry, friable when moist; non- and corn that are dr yfarinecl.'I hey also Rye suited to maii�T .
<br /> calcareous; abrupt, sIllooth boundary. -inds of irrigated crops. In d6fartned fields,the practice
<br /> 111-5 to 0 inches,Halt grayish-brown (10YR 4/2) loam,very of following small grain or sorghum "-it manner fallow
<br /> curl; grayish brown (10YR 3/2) whenmoist; model-- helps in n aintaining soil moisture Hanel fertility, Stubble
<br /> ate, coalse, subangular blocky structure that breaks mulcliinm and working- 1 cro i residue into the soil are 1�rac-
<br /> to moderate, medium, subangular; slightly hard when 5
<br /> dry, firer when Moist; nonealcareous; about 2 percent tice,s-needed for controlling erosion.
<br /> fine gravel; clear, smooth boundary. Ili irrigated fields the soils can be leveled so that the
<br /> L21t-0 to 14 inches, dare; grayish-brown (10YR 4/2) clay rater spreads uniforinly. The crops respond well if fer-
<br /> loam, very dark grayish broR-n (10YR 3/2) when tilizer is added. Working crop residue into the soil helps
<br /> iuoist; moderate, medium, prismatic structure that
<br /> breaks to moderate, fine, subangular blocky; hard to control erosion and to maintain fertilitj- and tilth. Blue
<br /> when dry, friable when moist; nonealcareous; very grania,western wheatgi ass, and similar grasses grow well
<br /> thin, patchy clay films; clear, smooth boundary. where these soils are used as range. Capatility units IIc-1
<br /> 1322tb-14 to 23 inches, dark-grad 10YR 4 1 silty clay loam,
<br /> very dark 10YR( 2/2) when moist; Etl'Ullg browll ( / ) (clr�-lancl) and Ile-2 (irrigated) • Loamy- hams range
<br /> , � �
<br /> medium, prismatic structure that breaks to strong, site; windbreak suitability group 1.
<br /> fine, subangular blocky; hard t'-hen dry-, firm when
<br /> moist; nonealcareous; thick, nearly continuous clay Richfield Belles
<br /> films; gradual, smooth Boundary.
<br /> D&ab-23 to 26 inches, pale-brown (10YR 6/3) silty clay
<br /> loam, dark brown (10YR 4/3) when moist• moderate, The, Richfield series consists of sleep, --ell-drained,
<br /> medium, prismatic structure that breaks to moderate, lonnin-soils of the uplands. These soils occur mainly-in the
<br /> metlitun, subangular blocky; slightly hard when dry, northeastern part of the count.,- and are nearly level to
<br /> friable --heii moist; strongly calcareous: risible lime liloderatelj' sloping.
<br /> along cleava e lines 'about 5 percent of the horizon
<br /> is very Hark grayish'brown (10YR 3/2) when moist; In a tyiiical profile the surface layer is graj'ish-brown
<br /> clear, wary boundary, loam about G inches thick.It is easily worked.
<br /> C1ca-26 to 43 inches,very pale brown (10YR s/3) loam, pale The subsoil,about 14 inches thick,is noneal care ous.It is
<br /> brown (10YR 6/3) when moist; moderate, medium, ravish-brown,hard clay loam in the upper part, slightly
<br /> prismatic structure that breaks to Moderate, medium,
<br /> sribaugular blocky; slightly hard when dry, very fri- hard, dark grayish-brown clay loam in tine. middle Bart,
<br /> able�-heii moist;veryy strongly calcareous;lime proM- and slightly liard light brownish-gray loam ill the lower
<br /> inert,but loaner part of horizon contains less lisle than part.
<br /> upper part; about 2 percent fine gravel; clear, wavy i7nderly-ing the subsoil is very pale brown loam or very
<br /> boundary.
<br /> C2-43 to GO inches, very pale brow-ii (10YR 8/3) silt loam, fine sandy loam that was deposited by wind and then re-
<br /> very pale brown (10YR 7/3) when moist; massive worked locally-by -ind and rater. The underlying mate-
<br /> (structureless) ; hard when dry, friable 'when moist; rial is very stronaln' Calcare0ll3 or strongly calcareous. It
<br /> very strongly calcareous. b
<br /> contains much accumulated lime.
<br /> The A horizon ranges from a to S inches in thickness,and the �
<br /> B2t horizon ranges from 10 to 20 inches in thickriess. -'lien Runoff is iuedium where slopes are nearly level,but it is
<br /> moist the B22f1) horizon is black to very dark brown. Depth rapid where they are gently-sloping or nioclerately-slopiu-'.
<br /> to lime ranges from 22 to 3S inches.In some areas a gravel bed The available rater holding capacity and liatur•aI fertility
<br /> underlies the loess at a depth of 40 inches or more.
<br /> Rago soils are associated with the Iiuma and I:ichfield soils. are high.
<br /> In contrast to I:ichfield soils, Rago soils have a ])lack to dark- Most of the acreage of Riclifield soils is cultivated.These
<br /> brown layer in the subsoil and are sleeper to the limy sub- soils are suited to--inter wheat and sorghums. The native
<br /> stratum. Rago soils have a more clayey I12t horizon than the vegetation consists mostly-of western rheatgrass and blue
<br /> Iiuma soils.
<br /> Rago and Iiuma loans (0 to 03 percent slopes) (Ra) are
<br /> grama, but some buffalograss grows in clepressional areas
<br /> in broad areas of the uplands. These soils are so similar there more clay has accumulated in the subsoil. Snake-
<br /> reed is a common perennial-weed where the native grasses
<br /> that it is not practical to map them separately-. This map leave been overgrazed.
<br /> ping unit is the most extensive one ill Phillips County. b•
<br /> Areas �ene.rally extend in a sontheizst direction and range Typical profile of Riclifield loam, 0 to a percent slopes,
<br /> from 40 to 400 acres in size.About 10 percent of the unit is in a cultivated wheatfield (530 feet.east,2,540 feet north of
<br /> I:sgo soil, and 30 percent is Kitnia soil,but some fields are the soutliwest corner of section 23,T.0 N.,R.43 AV.) :
<br /> All Rago soil, and others are all Kiuna soil. Ap—o to G inches, grayish-brown (10YR 5/2) loam, very dark
<br /> Included in mapping were small areas of Platner, Rich- grayish brown (10YR 3/2) when moist; weak, fine,
<br /> ,a granular structure; soft when dry, very friable when
<br /> field, and Dares soils. The I latner soil is in the western moist; nonealcareous; clear, smooth boundary.
<br /> part of the county,the Riclifield soil is ill the eastern part, D1—G to 10 inches,grayish-blown (10YR 5/2) clay loam, 'very
<br /> and the Dares soil is in both the central and-•estern parts. dark grayish brown (10YR 3/2) when moist; weak,
<br /> Also included were areas of a soil that is similar to I:auo coarse,prismatic structure that breaks to weak,coarse,
<br /> subangular blocky' hard when dry, firm when moist;
<br /> loam, except that gravelly- material is at a depth of about 'very thin,patchy clay films on vertical and horizontal
<br /> 24 inches. flans- small intermittent lakes or potholes are faces of peels;nonealcareous; clear, smooth boundary.
<br /> I12t-10 to 15 inches, dark grayish-brown (10YR 4/2) clay
<br /> within mapped areas and are shorn on the soil map by a loam, very dark grayish brown (10YR 3/2) when
<br /> symbol. moist; moderate, medium. prismatic structure that
<br /> Rago and Iiuma loans absorb rater at a moderate to breaks to moderate, medium and fine, subangular
<br /> slot rate, and runoffblocky; slightly hard when dry, firm when moist;
<br /> causes erosion during some storms. thick, continuous clay films on vertical and horizontal
<br /> These soils have higli available moisture capacity, faces of peels;nonealcareous;clear, smooth boundary.
<br />
|