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A .
<br /> 16 SOIL SURVEY
<br /> films on vertical and horizontal faces of peds; non- of light brownish
<br /> calcareous; clear,smooth boundary, a gray (lO5 p rce are evident in
<br /> layer 1 or
<br /> B22tb-16 to 29 inches, Clark-gray (10YR 4/1) clay loam,black a inches thick; 5 percent fine gravel; F
<br /> areous; abrupt, smooth boundary.
<br /> (10YR 2/1) when moist; strong, medium and fine, B?t-5 to 12 inches, dark gray sh-brown (10YR 4/2) clay,re
<br /> prismatic structure that breaks to strong,fine,angular (lark grayish brown (10YR 3/2) when moist; troy
<br /> blocky; slightly hard when dry, firm when moist; medium and fine thick, continuous clay films on vertical and horizontal Prismatic structure that breaks
<br /> faces of peels; noncalcareous; clear, smooth boundary' strong, medium, angular blocky; very hard when ,
<br /> B3b-29 to 37 inches, light brownish-grayfirm when moist; moderate, continuous clay films(10YR 6/2) clay vertical and horizontal peel faces; some bleached say
<br /> loam, dark grayish brown (10YR 4/2) when moist;
<br /> moderate medium grains no boundary.l
<br /> tops n Prisms;
<br /> , prismatic structure that breal:s to clear,smooth boundary. pH 7.2; noncaleareou
<br /> moderate, medium, subangular blocky; slightly hard 133-12 to 17 inches,dark grayish-brown (10YR 4/2) light cl,
<br /> When dry, friable when moist; noncalcareous; thin, lommn, dark
<br /> patchy clay films;many krotovinas filled with material grayish brown (10YR 4/c when moil
<br /> from above, very Clark grayish brown (10YR 3/2) break to moderate, medium, prismatic structure th
<br /> when moist; clear, smooth boundary. breaks to weak to medium'subangular blocky; ve
<br /> Cca-37 w e inches hard when dry, friable when moist; thin• patchy ch
<br /> / )pale-brown (10YR 6/3) loam, dark brown films on vertical and horizontal ped faces; streaks
<br /> (10YR 4/3) when moist; weak, medium and thick, very(lark grayish brown (10YR 3 �
<br /> prismatic structure that breaks to weak, medium and /-) when moist,a�
<br /> coarse, subangular blocky; soft when dry, very friable brown (lOTR 4/3) when moist, on some vertle,
<br /> when moist; very strongly calcareous; a layer of ped faces; pH 7.6; noncalcareous; clear, smool
<br /> boundary.
<br /> very fine sandy loam, dark brown (10YR 4/3) when Clea-17 to 24 inches• very pale brown (10YR 8/3) loam, pa
<br /> moist, is at a depth of 46 to 60 inches; many kroto-
<br /> vinas; gradual boundary. brown (10YR 6/3) when moist; weak, coarse, pri
<br /> matic structure that breaks to weak, coarse, su
<br /> In thickness. the A horizon ranges from 5 to 10 inches and angular blocky; bard when dry, friable when Lois
<br /> the B21t horizon ranges from 6 to 15 inches. Depth to the top strong accumulation of visible finely divided limt
<br /> of the buried soil ranges from 12 to 18 inches. In some areas PH 9.0; very strongly calcareous; clear, snmool
<br /> gravelly material underlies these soils at a depth of only 40 boundary.
<br /> inches. IIC2ca-24 to 48 inches,light yellowish-brown (10YR 6/4) fii
<br /> Iiuma soils have less clay in heir subsoil than Rago or sandy clay loam, yellowish brown (10YR 5/4) whE
<br /> Richfield soils. Iiuma soils are deeper to the limy substratum moist; massive (structureless) ; hard when dry, vei
<br /> than are Richfield soils and have weaker structure throughout. friable when moist; 40 to 50 percent fine grave-
<br /> moderate accumulation of lime in which visible liu.
<br /> Platner Series occurs in finely divided forms, as coatings on tt
<br /> Pebbles, and as common, medium-sized soft coucr
<br /> tions; lower 14 inches slightly more sandy and cot
<br /> The Platner series consists of deep, well-drained,loamy tails more lime than upper part of horizon; PH 9.c soils that are nearly level to moderately sloping. These very strongly calcareous; clear, wavy boundary.
<br /> soils are extensive in the hardlands in the southwestern IIC3-48 to 60 inches, pinkish-white (7.5YR 3/2) very fir
<br /> part of the county.A few areas are also alono the banks of wnssive (trucur sandy clay totur pink (7,eless) ; very hard
<br /> w when moist
<br /> ard when dry, friab]
<br /> small intermittent drainageways. These soiles formed in a warren moist; strong accumulation of lime in marllih
<br /> thin silty deposit of windblown material that has been material; pH 9.0; very strongly calcareous.
<br /> mixed to some extent with the underlying sand and gravel. The A horizon has little range in color or texture. In nmo�
<br /> In a typical profile the plow layer is grayish-brown loam areas it shows bleaching or clean sand grains on the structur
<br /> about 5 inches thick.Fine gravel makes ap about 5 ercent faces in the lower inch,but the sand grains are normally mixe
<br /> of this layer. Clean sand grains are evident in the lower with 4 ttheo 7 inches layer
<br /> n thickness. The�B horizon runges range
<br /> inch of this layer, to 12 inches in thickness and from dark grayish brown t
<br /> The subsoil is about 12 inches thick. The upper part, (lark brown ill color. It is heavy lay loam or clay. Depth t
<br /> about 7 inches thick, is Clark grayish-brown clay that is lime ranges from 10 to 20 inches.
<br /> very hard when dry and firm when moist. The lower part Platuer soils developed in a thinner deposit of loess than th
<br /> is Clark grayish-brown clay loam that is very hard when hebRago soilsco soils, lThe subsoil of they hick the(Platner soils ark, buried ismoreaclayeyran(
<br /> dry and friable when moist, more strongly developed than that of Ascalon oils.
<br /> The underlying material is very pale brown, very Platner loam, 0 to 3 percent slopes (PaB) mainly oc
<br /> strongly calcareous loam that is more sandy and limy as cupies convex areas that are irregular in shape and ar(
<br /> depth increases. elongated in a southeast-northwest direction. This soil i;
<br /> These soils have high natural fertility and available also on side slopes along intermittent drainageways. It,,
<br /> water holding capacity. They are well suited to dryland profile is the one described as typical for the series.
<br /> cultivation under normal management, but soil blowing Included with this soil in mapping were small areas of
<br /> and water erosion are hazards in cultivated areas. Plow- nearly level Rago soils in slightly clepressional areas. Alsc
<br /> pans form easily in these soils if they are tilled when wet, included were a few small spots of gravel or caliche out-
<br /> Almost all the acreage is dryfarmed, mainly to winter crops, which are shown on the soil map by a symbol.
<br /> wheat, barley, oats, and sorghums. In a few undisturbed, Nearlyall of this soil is cultivated.Soil blowing and wa-
<br /> gy enerall small areas the native veetation is mainly ter erosion are only slight in dryfarmed areas that are
<br /> grama grasses. b managed well, but plowpans form easily if this soil is
<br /> Typical profile of Platner loam, 0 to 3 percent slopes,in tilled when wet. Suitable dryfarming practices are use of
<br /> a field of winter wheat (1,890 feet east and 200 feet north stubble mulch and crop residue. Where irrigated,this soil
<br /> of the southwest corner of section 16,T.7 N.,R.46 W.) ; can be leveled so that water spreads uniformly and is not
<br /> Ap—o to 5 inches wasted. In irrigated areas, crop residue should be worked
<br /> grayish-brown loam, very dark into the soil so as too maintain tilth and reduce erosion.
<br /> grayish brown (10YR 3/2)2) w whenen moist; moderate,
<br /> fine, granular structure; slightly hard when (try, Grass can be seeded and irrigated and then used for hay or
<br /> friable when moist; bleached sand grains and.specks pasture.
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