LOCATION INMAN TNEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, thermic Ruptic-Alfic Eutrudepts
TYPICAL PEDON: Inman flaggy silty clay loam - pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; dark grayish brown (10YR 4/2) flaggy silty clay loam; moderate medium granular structure; friable; many fine roots; 15 percent fragments of limestone up to 1 inch thick and 8 inches long; slightly acid; clear smooth boundary. (4 to 9 inches thick)
Bw1--6 to 12 inches; yellowish brown (10YR 5/4) flaggy silty clay; moderate medium and fine subangular blocky structure; firm; common fine roots; 15 percent fragments of limestone and shale up to 1 inch thick and 8 inches long; moderately acid; clear wavy boundary.
Bw2--12 to 17 inches; yellowish brown (10YR 5/6) flaggy silty clay; few fine and medium distinct strong brown (7.5YR 5/6) and pale brown (10YR 6/3) mottles; moderate fine and medium angular blocky structure in 80 percent of the mass, 20 percent medium to very thick platy rock structure; firm; 25 percent fragments of shale and hard limestone up to 2 inches thick and 8 inches long; slightly acid; gradual irregular boundary.
Bw3--17 to 25 inches; light olive brown (2.5Y 5/6) flaggy silty clay; common fine and medium prominent strong brown (7.5YR 5/6) and pale brown (10YR 6/3) mottles; few thin prominent gray (10YR 6/1) and light gray (10YR 7/2) streaks and seams of highly weathered rock; moderate fine and medium angular blocky structure in about 70 percent of the mass, 30 percent medium to very thick platy rock structure; firm; 30 percent fragments of shale and hard limestone up to 2 inches thick and 10 inches long; slightly acid; gradual irregular boundary. (Combined thickness of the Bw horizons ranges 12 to 32 inches)
Cr/B--25 to 32 inches; interbedded, highly fractured limestone and shale make up about 80 percent by volume; the strata are 2 to 4 inches thick and are rippable; few thin gray coatings along horizontal fracture planes; crevices 1/8 to 1 inch wide are filled with mottled brown and gray silty clay and small fragments; slightly acid; clear smooth boundary. (0 to 14 inches thick)
Cr--32 to 72 inches; interbedded phosphatic limestone and shale; strata 2 to 6 inches thick.
TYPE LOCATION: Wilson County, Tennessee; 2 miles east of Davidson County line on Interstate Highway 40; 150 yards west of south end of Central Pike bridge over I-40.
RANGE IN CHARACTERISTICS: Thickness of solum and depth to bedrock ranges from 20 to 40 inches. Thin fragments of rock 1 inch to 15 inches long ranges from 10 to 35 percent by volume in each horizon. The reaction ranges from medium acid to neutral, except thin layers near bedrock range to mildly alkaline.
The Ap horizon has hue of 10YR, value of 4 or 5, and chroma of 2 to 4. Some pedons have a thin A horizon with hue of 10YR, value of 3 or 4, and chroma of 2 or 3. The fine earth fraction of the A horizon is dominantly silty clay loam or silt loam, and includes clay in severely eroded pedons.
The Bw horizon has hue of 2.5Y, 10YR or 7.5YR, value of 4 or 5, and chroma of 3 to 6. The fine earth fraction is silty clay, clay, or silty clay loam with 35 to 55 percent clay. Mottles in shades of brown and yellow range from few to many in most pedons. The Bw horizon is dominantly a cambic horizon, but part of each pedon has some evidence of clay illuviation. In the lower part of most pedons there are a few streaks or coatings of gray that are inherited from the parent rock.
The B part of the Cr/B horizon has colors and textures like the Bw horizon, except it is mottled without a dominant matrix color in many pedons.
COMPETING SERIES: Inman is the only series in this family. Soils in similar families are the Colbert, Dandridge, Eden, Hampshire, Mimosa, and Needmore series. All of these soils except Dandridge have continuous argillic horizons. Colbert, Eden, Hampshire, and Mimosa soils are more than 40 inches deep over bedrock. Dandridge soils are less than 20 inches deep to bedrock. Needmore soils have a mesic temperature regime and are free of flagstones.
GEOGRAPHIC SETTING: Inman soils are on hillsides. Slopes range from 5 to 40 percent. The soil formed in residuum weathered from phosphatic interbedded limestone and shale. Near the type location, the mean annual air temperature is 60 degrees F., and the mean annual precipitation is about 52 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Hampshire and Mimosa series listed as competing series, and the Armour, Dowellton, and Stiversville series. Armour soils are fine silty, Dowellton soils are gray and poorly drained, and Stiversville soils are fine-loamy.
DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderately slow permeability.
USE AND VEGETATION: About three-fourths of the soil is cleared and used mainly for growing pasture. The native vegetation is forest of oaks, walnut, locust, ash, hickory, beech, elm, maple, and cedar.
DISTRIBUTION AND EXTENT: The Central Basin and extreme western edge of the Highland Rim in Tennessee. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Decatur County, Tennessee; 1943.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface of the soil to a depth of 6 inches (Ap horizon)
Cambic horizon - the zone from about 6 inches to a depth of about 25 inches (Bw1, Bw2, Bw3 horizons)
Paralithic contact - interbedded limestone and shale at a depth of 32 inches.