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16 SOIL SURVEY
<br /> films on vertical and horizontal faces of Reds; non- of light browillsh gray (10YR 6/2) are evident in a
<br /> calcareous clear, smooth boundary. layer 1 or 2 inches thick; 5 percent fine gravel; pH
<br /> P22t1}--1G to 29 inche , darn gray (10YR 4/1) clay loath, black 6.4; noncaleareotts; abrupt, smooth boundary.
<br /> (10YR 2/1) when moist; strong, medium and fine, P,2t-5 to 12 iuches, curl grayish-brown (10YR 4j2) clay,very
<br /> prismatic structure that breaks to strong,fine,angular dark grayish brown (10YR 3/2) when moist; strong,
<br /> blocky; slightly hard when dry, firm when moist; medium and fine, prismatic structure that breaks to
<br /> thick, continuous clay films our vertical and horizontal strong, medium, turgular blocky; very hard when dry,
<br /> faces of peels; noucalcareous; clear,smooth boundary. firm when moist; moderate, continuous clay films on
<br /> E3b-29 to 37 itches, light. brownish-gray (10YR 6/2) clay vertical and horizontal ped faces; some bleached sand
<br /> loath, dark grayish brown (10YR 4/2) when moist; grains on tops of prisms; 1)11 7.2; noncalcareous;
<br /> moderate,medium, prismatic structure that breaks to clear,smooth boundary.
<br /> moderate, medium, subangular blocky; slightly hard 113-12 to 17 inches, (lark grayish-brown (10YR 4/2)light clay
<br /> when dry, friable when hoist; noncalcareous; thin, loam, (lark grayish brown (10TR 4/2) when moist;
<br /> patchy clay films;many krotovinas filled with material weak to moderate, medium, prismatic structure that
<br /> from above, very dark grayish brown (10YR 3/2) breaks to weak to medium subangular blocky; very
<br /> when moist; clear, smooth boundary. hard when dry, friable when moist; thin, patchy clay
<br /> Cca-37 to GO inches,pale-brown (10YR 6/ ) loam,(lark brown films on vertical and horizontal peel faces; streaks of
<br /> (10YR 4/3) when moist; weak, medium and thief. very Clark grayish brown (10YR 3/2) when moist, and
<br /> prismatic structure that breaks to weal, tuedinin and brown (10YR 4/3) when moist, on some vertical
<br /> coarse,subangular blocky; soft when dry, very friable peel faces; ]ill 7.0; noucalcareous; clear, smooth
<br /> when moist; very strongly calcareous; a layer of boundary.
<br /> very fine sanely loam, (lark brown (10Y11, 4/3) when C1ea-17 to 24 inches,very hale brown (10YR 8/3) loan],hale
<br /> moist, is at a depth of 46 to GO inches; many kroto- brown (107R 6/3) when moist; weak, coarse, pris-
<br /> visas;gradual boundary. tnatic structure that breaks to weal., coarse, .sub-
<br /> In thickness, the A horizon ranges from 5 to 10 inches and angular blocky; hard when dry, friable when moist;
<br /> the 1321t horizon ranges from G to 15 inches. Depth to the top strong accumulation of visible finely divided lime;
<br /> Of the buried soil ranges from 12 to 1S inches. In some areas plI 9.0; very strongly calcareous; clear, smooth
<br /> gravelly material underlies these soils at a depth of only 40 boundary.
<br /> inches. IIC2ca-24 to 48 inches,light Yellowish-brott-u (10YR 6/4) fine
<br /> Iiuma soils have less clay in their subsoil than Rago or sandy clay loam, yellowish brown (10YR 5/4) when
<br /> Richfield soils. Klima soils are deeper to the limy substratum moist; massive (structureless) ; hard when dry, very
<br /> than are Richfield soils and have weaker structure throughout. friable when moist; 40 to 50 percent fine gravel;
<br /> moderate accumulation of Mile in which visible lime
<br /> occurs in 'finely divided fortes, as coatings on the
<br /> Platner Series pebbles, and as cortntroil, ntediaai-sized soft concre-
<br /> tions; lower 14 inches slightly more sanely and con-
<br /> The Platuuer series consists of sleep, well-drained,loamy twins more ]line than upper part of horizon; 1)1I 9.0;
<br /> soils that are nearly level to moderately sloping. These very strongly calcareous; clear, wary boundary.
<br /> r IIC3=48 to GO inches, pinkish
<br /> soils are extensive in the liardlaiicls in the Southwestern -white (7.5YR 8/2) very fine
<br /> sautdy Clay login, pink (7.5YR 7/4) when moist;
<br /> part of the county.A few areas are also along the banks of massive (structureless) ; very hard when dry, friable
<br /> small intermittent drainageways. These soils formed in t when moist; strong accumulation of lime in marnike
<br /> thin silty deposit of winclblowli material that has been material; pH 9.0; very strongly calcareous.
<br /> mired to solne extent with the-underlying sand and gravel. The A horizon has little range in color or texture. In most
<br /> In-a typical profile the plow layer is grayish-brown loam areas it shows bleaching or clean sand grains on the structure
<br /> Fine faces in the lower inch,but the sand grains are normally mixed
<br /> about 5 inches thick.nine gravel males ul) about 5 percent
<br /> 1 1 with the plow Dyer in cultivated areas. The �� horizon r;ingcs
<br /> of this layer. Clean sand grains are ev1C ent in the loner from 4 to 7 itches in thickness. The P, horizon ranges from 5
<br /> inch of this layer. to 12 inches in thickness and from (lark grayish brown to
<br /> The subsoil is about 12 inches thick. The -upper part, (lark brown in color. It is heavy clay loans or clay. Depth to
<br /> line ranges from 10 to 20 inches.
<br /> about 7 inches thick, is dark. grayish-brown clay that is Platu(r soils developed in a thinner deposit of loess than the
<br /> very hard when dry and firm when moist. The loner part Rago soils, and they lack the (lark, buried layer that occurs in
<br /> is Clark grra�•isli-brown clay loaln that is very hard when the Rago soils. The subsoil of Platner soils is more clayey and
<br /> dry and Tribble when moist. more strongly developed than that of Ascalon soils.
<br /> The underlying niltterial is very pale broll i I Platner loam, 0 to 3 percent slopes (PaB) mainly- oc-
<br /> strongly calcareous loam that, is more sandy and limy as copies convex areas that. are irregular in shape and are
<br /> depth increases. elongated in a southeast-northwest direction. This soil is
<br /> These soils have high natural fertility -Intl available also 0n side slopes along intermittent draillageways. Its
<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 depressional areas. Also
<br /> Bans form easily-in these soils if they are tilled when wet. included were a few small spots of gravel or caliche out-
<br /> crops,mainly to winter croT)s, which are shown on the soil map by a s}mbol.
<br /> Almost all the acreage is dry far
<br /> wheat, barley, oats, and sorghums. In a few undisturbed, Nearly all of this soil is cultivated.Soil blowing and wa-
<br /> generally small areas, the native vegetation is mainly? ter erosion well,
<br /> only slight in corm easi d areas that are
<br /> managed well, but plo�vp-Ins form easily if this soil is
<br /> g2Typ grasses. tilled when wet. Suitable dryfarrning practices are use of
<br /> 'Typical profile of Platner loam, 0 to 3 percent slopes,in stubble mulch and crop residue. Where irrigated,this soil
<br /> a field of winter wheat (1,8(JO feet east and 200 feet north of the southwest cornercall be leveled so that water spreads uniformly and is not
<br /> of section 1G,T.7 Iv.,R.4G�V.) : wasted. In irrigated areas, crop residue should be worked
<br /> grayish brown (10YR Ap-0 to 5 inches, grayish-brown3/22)) when moist; moderate,5/2) loam, very (lark into the soil so as to maintain tilth and reduce erosion.
<br /> fine, granular structure; slightly hard when dry, 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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