The Cooperative Soil Survey

SOIL SURVEY OF BARTON COUNTY MISSOURI

Lebanon Series - Missouri Distribution
    The Lebanon series consists of deep, gently sloping soils on uplands. These soils have a firm fragipan at a depth of 18 to 36 inches (fig. 15). They formed under trees in cherty limestone residuum that has a thin mantle of loess or old silty alluvium.

Figure 15. - Profile of Lebanon silt loam, 2 to 5 percent slopes.

    In a representative profile, the surface layer is very dark grayish-brown silt loam about 2 inches thick. The subsurface layer is grayish-brown and brown silt loam about 4 inches thick. The subsoil extends to a depth of 72 inches or more. The upper 4 inches of the subsoil is strong-brown silty clay loam, the next 7 inches is reddish-brown silty clay loam, and the next 5 inches is mottled grayish-brown, yellowish-brown, and strong-brown silty clay loam. The fragipan is mottled, grayish, brownish, and reddish very cherty silty clay loam about 16 inches thick. Below this is mottled, yellowish, grayish, brownish, and reddish cherty silty clay to clay.

    Lebanon soils are low in natural fertility and are moderately well drained. Runoff is medium. Permeability above the fragipan is moderate, but it is slow in the fragipan. Available water capacity is moderate. A fragipan at a moderate depth makes these soils somewhat droughty. Susceptibility to erosion, however, is the major limitation that affects their use.

    More than half the acreage of these soils is in grasses and legumes that are used for pasture and hay. A large acreage is in stands of post oak and brush. A few acres are in small grain and sorghums.

    Representative profile of Lebanon silt loam, 2 to 5 percent slopes, in an .area of post oak sprouts and a few wild grasses, 600 feet north and 425 feet west of the southeast corner of sec. 16, T. 31 N., R. 29 W.:

A1—0 to 2 inches, very dark grayish-brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; strong, very fine, granular structure; very friable; many grass roots and woody roots; few worm channels and casts; few very small iron and manganese concretions; strongly acid; abrupt, smooth boundary.

A2—2 to 6 inches, grayish-brown (10YR 5/2) and brown (10YR 5/3) silt loam; light gray (10YR 7/2) and very dark brown (10YR 7/3) dry; few, faint, very dark grayish-brown and yellowish-brown mottles; moderate, thin, platy structure; very friable; common woody roots; vesicular; common worm channels; common worm casts; few iron and manganese concretions ; very strongly acid; clear, wavy boundary. 

B1t—6 to 10 inches, strong-brown (7.5YR 5/6) light silty clay loam; many, fine, faint, pale-brown mottles; weak, very fine, subangular blocky structure; very friable; common woody roots; thin patchy clay films; common worm channels and a few casts; few iron and manganese concretions; very strongly acid; clear, smooth boundary.

B21t—10 to 17 inches, reddish-brown (5YR 4/4) silty clay loam; many, fine, faint, yellowish-red mottles and few, fine, faint, brown mottles; strong, fine and medium, angular and subangular blocky structure; firm; few roots; thin continuous clay films; few worm channels; common very small iron and manganese concretions; extremely acid; clear, smooth boundary.

B22t—17 to 22 inches, mottled, grayish-brown (10YR 5/2), yellowish-brown (10YR 5/4), and strong-brown (7.5YR 5/6) silty clay loam; few, medium, distinct, yellowish-red (5YR 4/6) and dark-red (2.5YR 3/6) mottles and few, fine, faint, dark-gray mottles; moderate, fine and medium, angular and subangular blocky structure; firm; few roots; thin continuous clay films: few worm channels: common very small iron and manganese concretions; extremely acid; clear, wavy boundary.

IIBx1—22 to 29 inches, coarsely mottled grayish-brown (10YR 5/2) and yellowish-brown (10YR 5/4) very cherty silty clay loam; lesser amounts of gray (10YR 6/1 and 5/1), dark-gray (10YR 4/1). brownish-yellow (10YR 6/6), and yellowish-red (5YR 5/8) silty clay loam ; massive; firm ; hard, compact and brittle; few roots; thick patchy clay films; few iron and manganese concretions; common, discontinuous, horizontal clay seams; about 65 percent chert; extremely acid; clear, wavy boundary.

IIBx2—29 to 38 inches, dark-red (2.5YR 3/6) and red (2.5YR 4/8) very cherty silty clay loam; few. fine, distinct, grayish-brown mottles and few, fine, faint, yellowish-brown and brownish-yellow mottles; massive; firm : hard. compact and brittle; few roots; thick patchy clay films; few iron and manganese concretions; common dark-gray clay seams and pockets; very strongly acid; clear, wavy boundary.

IIB231—38 to 53 inches, red (2.5YR 4/8) and brownish-yellow (10YR 6/6) cherty silty clay; few, fine, faint, dark-gray, yellowish-brown, and yellowish-red mottles; moderate, medium and coarse, angular blocky structure; very firm; few roots; few iron and manganese concretions; about 40 percent chert; very strongly acid; clear, wavy boundary.

IIB24t—53 to 72 inches, brownish-yellow (10YR 6/6) and yellowish-red (5YR 5/8) clay; few, fine, faint, strong-brown and dark-gray mottles; moderate, medium and coarse, angular blocky structure; very firm; few roots; few iron and manganese concretions; common calcium concretions; about 10 percent chert; slightly acid.

    The Ap horizon and the A2 horizon are dominantly brown (10YR 5/3 and 4/3) but range to grayish brown (10YR 5/2). In undisturbed areas an Al horizon that is dark brown (10YR 3/3) to very dark brown (10YR 2/2) and about 1 to 4 inches thick is present. In most places the A horizon contains few fragments of chert. The B horizon ranges from medium acid to extremely acid in reaction and from about 14 to 26 inches in thickness. The Bit horizon is brown (10YR 4/3) to strong brown (7.5YR 5/6) in color and from 3 to 8 inches in thickness. The B21t horizon ranges from yellowish brown (10YR 5/4) to reddish brown (5YR 4/4) or yellowish red (5YR 5/6). The B22 horizon, in most places, is mottled and the dominant color is not redder than 7.5YR. The B2t horizon ranges from silty clay loam in the upper part to heavy silty clay loam, light silty clay, or cherty silty clay loam in the lower part. The IIBxl and IIBx2 horizons range from strongly acid to extremely acid and are 8 to 40 inches thick. Low, slightly concave slopes have less than 15 percent fragments of chert in places. The horizons below the fragipan range from very strongly acid to slightly acid and contain a little less than 15 percent to more than 36 percent fragments of chert.

    Lebanon soils are associated with Creldon, Keeno, Nixa, and Askew soils. They have a lighter colored or thinner surface layer than Creldon and Keeno soils. They have less chert in the surface layer and subsoil than Keeno and Nixa soils. Lebanon soils, unHke Askew soils, have a fragipan and at least a few fragments of chert throughout the soil.

Lebanon silt loam, 2 to 5 percent slopes (LeB)

Hughes, H.E. 1974. Soil Survey of Barton County, Missouri. USDA-SCS. U.S. Gov. Print. Office, Washington, DC.