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<br /> Vona Series
<br /> The Von,% series consists of deep, well-drained, coarse
<br /> Fs:.:" textured to moderately coarse textured soils on uplands.
<br /> L.` These soils are free of harmful snits.
<br /> The surface layer is grayish-brown sand} Ioam about 3
<br /> �1:. . inches thick. It absorbs water readily.
<br /> The subsoil is lime-free, brown sandy loam about 25
<br /> inches thick._although of the same textural class as the
<br /> surface layer, it contains more clay. Permeability in this
<br /> layer is moderate to moderately rapid.
<br /> The underlying material is luny sandy loam and loam
<br /> that was deposited by wind. Plant roots penetrate this
<br /> material easily.
<br /> i Vona soils are highly erodible if farmed.They are some-
<br /> what droughty. The orb nic-matter content is low. The
<br /> supply of nitrogen is low,and the supplies of phosphorus
<br /> and potassium are moderate.
<br /> 1 These soils are used for range, for irrigated farming,
<br /> and for dryland farming. The native range plants are
<br /> blue grama, sand dropseed,yucca, and forbs. Most of the
<br /> common crops can be grown under irrigation.Pinto beans,
<br /> !: sorghum, and winter wheat are grown without irrigation.
<br /> Representative profile in an area of native short-grass
<br /> range, 1/2 mile west and 200 feet north of the southeast
<br /> corner of sec. 23, T. 18 S., R. 58 N.
<br /> !• Al-0 to 3 Inches, grayish-brown (10TR 5/2) sandy loam,
<br /> i dark grayish brown (10YR 4/2) when moist; weak,
<br /> coarse, crurrrb structure that breaks to weak, fine,
<br /> crumb; soft when dry,very friable when moist; non-
<br /> calcareous; clear, smooth boundary.
<br /> 131-3 to 0 inches,brown (10YR 5/3) sandy loam,dark grayish
<br /> brown (10YR 4/2) when moist; moderate, medium,
<br /> subangular blocky structure; slightly bard when dry,
<br /> very friable when moist;noncalcareous;clear,smooth .
<br /> ({ boundary.
<br /> B2t--6 to 28 Inches, brown (10YR 5/3) heavy sandy loam;
<br /> dark brown (10TR 3/3) when moist; moderate,
<br /> medium,subangular blocky structure; hard when dry,
<br /> very friable when molst; thin patchy clay films on
<br /> ped surfaces; nonenlcareous; gradual, smooth bound- i
<br /> ary.
<br /> Ii 01ca-28 to 35 Inches, yellowish-brown (10YR 5/4) sandy
<br /> loam, dark yellowish brown (10YR 4/4) when moist;
<br /> 3•�1 massive; hard when dry, very friable when moist;
<br /> !! strongly calcareous, with segregated lime as medium-
<br /> -sized, soft concretions; clear, smooth boundary.
<br /> t C2ca-35 to 50 Inches,light yellowish-brown (10YR 0/4) loam,
<br /> dark brown (10YR 4/3) when motst;massive;slightly
<br /> (� hard when dry, very friable when moist; strongly
<br /> calcareous; clear, smooth boundary.
<br /> C3-50 to 00 inches, light yellowish-brown (10YR 6/4) loamy
<br /> fine Sand; massive; soft when dry, very friable when
<br /> i moist; strongly calcareous.
<br /> The surface layer is 2 to 12 inches thick.In texture it ranges
<br /> 1 from sandy loam to loamy sand. The subsoil is from 12 to 36 !
<br /> Inches thick and ranges from brown to light yellowish brown
<br /> in color. Below the subsoil is sandy loam, silt loam, loam, or,
<br /> in places, loamy sand. The depth to lime ranges from 20 to 48
<br /> inches.
<br /> Vona soils are associated with Tivoli and Olney soils, They
<br /> are less sandy than Tivoll soils but more sandy than Olney
<br /> soils.They lack the promluent subsoil structure that is charac-
<br /> teristic of Olney sells.
<br /> Vona sandy loam, 1 to 3 percent slopes (VdB).—This
<br /> i soil occurs in the irrigated part of the county, as areas
<br /> ranging up to 200 acres in size.
<br /> : : . This soil is well suited to corn,grain sorglitim, and al-
<br /> falfa. Because water intake is rapid, irrigation furrowe
<br /> a should be relatively short. Soil nutrients can be lost
<br /> i through overirrigation. Both wind and water erosion are
<br /> I hazards, Plowing in fall is not advisable, because Find
<br /> -. erosion is a hazard. (Irrigated capability unit IIIe-4)
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