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<br />t
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<br />This soil is seasonally wet because of seep from
<br />irrigation canals or irrigation waste water. When
<br />the seep water evaporates it leaves in places a
<br />white, thin, patchy crust of salts on the surface.
<br />Most of the acreage is used as range. The native
<br />grasses are inland saltgrass and alkali sacaton.
<br />Some areas have been farmed from time to time, but
<br />are not productive, because of the salinity. This
<br />soil is well suited to irrigated or non irrigated pas-
<br />ture. (Irrigated capability unit lIew-I; nonirriga-
<br />ted capability unit Vlw-l; Salt Meadow range site)
<br />
<br />Harvey-Stoneham lo~, 0 to 3 percent slopes
<br />(HsB) .--This complex is on uplands, mostly in the
<br />northern half of the county in areas up to 1,200
<br />acres in size. About 75 percent of each area is
<br />Harvey loam, wet, and about 25 percent is Stoneham
<br />loam.
<br />The Harvey soil in this soil complex has the pro-
<br />file similar to that described as typical for the
<br />series. The Stoneham soil has the profile described
<br />as typical for the Stoneham series.
<br />The principal inclusions are Olney sandy loam,
<br />o to 3 percent slopes, and Manvel silt loam, 0 to 3
<br />percent slopes. Total inclusions account for about
<br />20 percent of each mapped area.
<br />This is a good soil for range. The porous sur-
<br />face layer takes water well, and there is high
<br />water-holding capacity in the subsoil. There is a
<br />high hazard of sheet erosion in overgrazed areas.
<br />Stock-water pits in this soil may need sealing.
<br />(Nonirrigated capability unit VIe-I; Loamy Plains
<br />range site)
<br />
<br />,
<br />
<br />Haverson Series
<br />
<br />The Haverson series consists of deep, well-
<br />drained, nearly level loams on stream terraces in
<br />the nonirrigated part of the county.
<br />In a typical profile the surface layer, about 6
<br />inches thick, is pale-brown loam. It is soft when
<br />dry and very friable when moist. Below the surface
<br />layer and extending to a depth of 60 inches is strat-
<br />ified pale-brown loam and silt loam and light brown-
<br />ish-gray silt loam. The substratum is slightly hard
<br />to very hard when dry but is very friable when moist.
<br />It is easily penetrated by plant roots, air, and
<br />water.
<br />Haverson soils have a moderate to moderately slow
<br />intake rate, medium surface runoff, moderate to mod-
<br />erately slow permeability, and high water-holding
<br />capacity. In places the soils are slightly saline.
<br />There is a moderate erosion hazard in the form of
<br />gullying and streambank cutting. These soils receive
<br />runoff from bordering uplands, and there is a pos-
<br />sibility of flooding when the streams overflow.
<br />The entire acreage is used as range. The native
<br />vegetation consists of blue grama, galleta, sand
<br />dropseed, cholla cactus, and four-wing saltbush.
<br />Typical profile of Haverson loam, 0 to 3 percent
<br />slopes, on a stream terrace of Timpas Creek in the
<br />southwest quarter of sec. 22, T. 27 S., R. 59 W.
<br />
<br />Al--O to 6 inches, pale-brown (lOYR 6/3) loam,
<br />dark grayish brown (lOYR 4/2) when moist;
<br />weak, medium, platy structure that parts to
<br />
<br />,~
<br />
<br />450-3390-72 -2
<br />
<br />weak, very fine, crumb; soft when dry, very
<br />friable when moist; strongly calcareous;
<br />abrupt, smooth boundary.
<br />Cl--6 to 11 inches, pale-brown (IOYR 6/3) loam, dark
<br />grayish brown (lOYR 4/2) when moist; very
<br />weak, medium, subangular blocky structure;
<br />slightly hard when dry, very friable when
<br />moist; strongly calcareous; clear, smooth
<br />boundary .
<br />C2--11 to 24 inches, light brownish-gray (lOYR 6/2)
<br />silt loam, dark grayish brown (lOYR 4/2) when
<br />moist; very weak, coarse, subangular blocky
<br />structure; hard when dry, very friable when
<br />moist; numerous fine pores; numerous small
<br />worm casts; strongly calcareous; clear, smooth
<br />boundary .
<br />C3--24 to 42 inches, pale-brown (lOYR 6/3) silt loam,
<br />brown (lOYR 5/3) when moist; weak to moderate,
<br />medium, subangular blocky structure; very hard
<br />when dry, very friable when moist; strongly
<br />calcareous; clear, smooth boundary.
<br />C4--42 to 60 inches, pale-brown (IOYR 6/3) silt
<br />loam, dark brown (lOYR 4/3) when moist; mas-
<br />sive; hard when dry, very friable when moist;
<br />strongly calcareous.
<br />
<br />The A horizon ranges from 4 to 10 inches in thick-
<br />ness and from silty clay loam to loam in texture.
<br />The stratification of the C horizon is weak, but
<br />commonly contains very thin lenses of fine sandy
<br />loam between the dominant silt loam and loam strata.
<br />Haverson soils are associated with Manzanola
<br />and Limon soils. They are not so fine textured as
<br />Limon soils. They do not have a B horizon, whereas
<br />the Manzanola soils have a thick well-developed one.
<br />
<br />Haverson loam, 0 to 3 percent slopes (HvB) .--
<br />This soil has the profile described as typical for
<br />the series. Most areas of this soil occur as narrow
<br />elongated areas along intermittent streams in the
<br />range part of the county.
<br />The principal inclusion is Limon silty clay, 0
<br />to 3 percent slopes, which accounts for about 20
<br />percent of each mapped area.
<br />This soil is relatively productive of range for-
<br />age because of the supplemental water it receives
<br />from runoff. The surface is usually too rough to be
<br />good for hay cutting. Erosion control structures
<br />are needed in places to control gullying. (Nonirri-
<br />gated capability unit VIe-4; Saline Overflow range
<br />site)
<br />
<br />Kim S eri es
<br />
<br />The Kim series consists of well-drained, gently
<br />sloping to sloping, loamy upland soils that develop-
<br />ed from material weathered from sandstone. In most
<br />places they are on fans and slopes below sandstone
<br />bluffs. They are extensive soils in the nonirrigated
<br />southern part of the county.
<br />In a typical profile the surface layer, about 4
<br />inches thick, is light brownish-gray loam that is
<br />soft when dry and very friable when moist. The
<br />underlying material to a depth of 31 inches is pale-
<br />brown or very pale brown loam. The material below
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