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UNTY', COLORADO 19
<br /> Ap-0 to 8 inches, grayish-brown (10YR 5/2) loam,PHILLIPS very darCOk Almost all the acreage is cultivated. The soils in this
<br /> grayish brown (10YR 3/2) when moist; weak, thin to rout are well suited to winter wheat, barley, sorghums,
<br /> very thick, platy structure that breaks to weak, fine andorn that are dryfarmed.They also are suited to many
<br /> granular; hard when dry, friable when moist; non-
<br /> calcareous
<br /> on• kinds of irrigated crops. In dryfarmed fields,the practice
<br /> calcareous; abrupt, smooth boundary, g n
<br /> B1-5 to 0 inches,dark grayish-brown (10YR 4/2) loam,very of following small grain or sorghum with summer fallow
<br /> dark grayish brown (10YR 3/2) when moist; moder- helps in maintaining soil moisture and fertility. Stubble
<br /> ate, coarse, subangular blocky structure that breaks mulching and working crop residue into the soil are prac-
<br /> dry,firm when moist; noncalcareous; about 2 percent
<br /> to moderate,medium, subangular; slightly hard when tices needed for controllingerosion.
<br /> fine gravel; clear, smooth boundary. In irrigated fields the soils can be leveled so that the
<br /> B21t-9 to 14 inches, dark grayish-brown (10YR 4/2) clay water spreads uniformly. The crops respond well if fer-
<br /> loam, very dark grayish brown (10YR 3/2) when tilizer is added. Working crop residue into the soil helps
<br /> moist; moderate, medium, prismatic structure that breaks to moderate, fine, subangular blocky; hard to control erosion and to maintain fertility and tilth. Blue
<br /> when dry, friable when moist; noncalcareous; very grama,western wheatgrass, and similar grasses grow well
<br /> thin,patchy clay films; clear, smooth boundary. where these soils are used as range. Capability units IIe-1
<br /> B22tb-14 to 23 inches, dark-gray (10YR 4/1) silty clay loam,very dark brown (10YR 2/2) when moist; strong, site
<br /> and IIe-2i (irrigated); Loamy Plains range
<br /> • te windbreak suitability group 1.
<br /> medium, prismatic structure that breaks to strong, >
<br /> fine, subangular blocky; hard when dry, firm when
<br /> moist; noncalcareous; thick, nearly continuous clay Richfield Series
<br /> films; gradual, smooth boundary.
<br /> B3cab-23 to-26 inches, pale-brown (10YR 8/3) silty clay The Richfield series consists of deep, well drained
<br /> loam, dark brown (10YR 4/3) when moist; moderate, ,
<br /> medium, prismatic structure that breaks to moderate, loamy soils of the uplands.These soils occur mainly in the
<br /> medium, subangular blocky; slightly bard' when dry, northeastern part of the county and are nearly level to
<br /> friable when moist; strongly calcareous; visible lime moderately sloping.
<br /> along cleavage lines; about 5 percent of the horizon
<br /> , In a typical profile the surface layer is grayish-brown
<br /> is very dark grayish brown (10YR 8/2) when moist; loam about 6 inches thick.It is easily worked.
<br /> t clear, wavy boundary.
<br /> Clea-26 to 43 inches,very pale brown (10YR 8/3) loam,pale The subsoil,about 14 inches thick is noncalcareous.It is
<br /> brown (10YR 6/3) when moist; moderate, medium, grayish-brown,hard clay loam in the upper part, slightly
<br /> prismatic structure that breaks to moderate,medium, and Clark grayish-brown clay loam in the middle part,
<br /> subangular blocky; sli hard when dry, very fri• gra y
<br /> able when moist;very strongly calcareous;lime prom- and slightly hard, light brownish-gray loam in the lower
<br /> inept,but lower part of horizon contains less lime than part.
<br /> upper part; about 2 percent fine gravel; clear, wavy Underlying the subsoil is very pale brown loam or very
<br /> boundary. fine sandy to 60 inches, very pale brown (10YR 8/3) silt loam, loam that was deposited by wind and then re-
<br /> very pale brown (10YR 7/3) when moist; massive worked locally by wind and water. The underlying mate
<br /> (structureless) ; hard when dry, friable when moist; rial is very strongly calcareous or strongly calcareous. It
<br /> very strongly calcareous, contains much accumulated lime.
<br /> The A horizon ranges from S to 8 inches in thickness,and the Runoff is medium where slopes are nearly level,but it is
<br /> B2t
<br /> the B22tbghorizon is bes from 10 lackOtonvery darches in k thickness.
<br /> Depth rapid where they are gently sloping or moderately sloping
<br /> to lime ranges from 22 to 38 inches.In some areas a gravel bed The•available water holding capacity and natural fertilit3
<br /> underlies the loess at a depth of 40 inches or more. high.
<br /> Rago soils are associated with the Kuma and Richfield soils. are of the acreage of Richfield soils is cultivated.Thest
<br /> In contrast to Richfield soils,Rage soils have a black to dark-
<br /> brown layer in the subsoil and are deeper to the limy sub- soils are suited to winter wheat and sorghums.The nativi
<br /> stratum. Rago soils have a more clayey B2t horizon than the vegetation consists mostly of western wheatgrass and blot
<br /> Duma soils. ()Tama, but some buff alograss grows in depressional area:
<br /> Rago and Kuma loamy (0 to 3 percent slopes) (Re) are where more clay has accumulated in the subsoil. Snake
<br /> in broad areas of the uplands. These soils are so similar weed is a common perennial weed where the native grassel
<br /> that it is not practical to map them separately.This map- have been
<br /> ping unit is the most extensive one in Phillips County. Typical profile overgrazed.Richfield loam, 0 to 3 percent slopes
<br /> from
<br /> generally to400
<br /> resend in a southeastbout70dpercent
<br /> and range in a cultivated wheatfield'(530 feet east,2,540 feet north o:
<br /> from 40 to 400 acres in size.About 70 ercent of the unit is the southwest corner of section 23,T.9 N.,R.43 W.) :
<br /> Rago soil,and 30 percent is Kuma soil,but some fields are
<br /> all Rago soil, and others are all Ktuna soil. Ap—O to 6 inches,grayish-brown (10YR 5/2) loam, very dart
<br /> Included in mapping were small areas of Platner,Rich- grayish brown (10YR 3/2) when moist; weak, find
<br /> granular structure; soft when dry, very friable whe:
<br /> field, and Dawes soils. The Platner soil is in the western moist; noncalcareous; clear, smooth boundary.
<br /> part of the county,the Richfield soil is in the eastern part, B1-6 to 10 dark grayish browbr wn ( 3Y2)5/2) c mo loam,
<br /> and the Dawes soil is in both the central and western parts. coarse,prismatic structure that breaks to weak,coarst
<br /> Also included were areas of a soil that is similar to Rago 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 horizonta
<br /> 24 inches. Many small intermittent lakes or potholes are faces of peds;noncalcareous; clear,smooth boundary
<br /> B2t-10 to 15 inches, dark grayish-brown (10YR 4/2) cla
<br /> within mapped areas and are shown on the soil map by a loam, very dark grayish brown (10YR 3/2) whe:
<br /> symbol. moist; moderate, medium, prismatic structure tha
<br /> Rago and Kuma loambreaks to moderate, medium and fine, subangulay absorb water at a moderate to blocky; slightly hard when dry, firm when moist
<br /> slow rate, and runoff causes erosion during some storms. thick,continuous clay films on vertical and horizonta
<br /> These soils have high available moisture capacity. faces of peds;noncalcareous;clear,smooth boundary
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