LOCATION LOMOND TNEstablished Series
TAXONOMIC CLASS: Fine-silty, siliceous, semiactive, thermic Mollic Paleudalfs
TYPICAL PEDON: Lomond silt loam, on a convex 4 percent slope, in tall fescue and clover pasture.
(Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; dark reddish brown (5YR 3/3) silt loam; weak fine and medium granular structure; friable; many fine roots; few small black and dark brown concretions; medium acid; clear smooth boundary. (5 to 9 inches thick)
AB--6 to 9 inches; dark reddish brown (5YR 3/4) silt loam; moderate fine and medium granular structure; friable; many fine roots; few small black and dark brown concretions; strongly acid; clear smooth boundary. (0 to 4 inches thick)
Bt1--9 to 20 inches; yellowish red (5YR 4/6) silty clay loam; few fine and medium streaks of reddish brown on faces of peds; moderate fine and medium subangular blocky structure; friable; thin discontinuous clay films on faces of peds; common fine roots; few small black concretions; strongly acid; clear smooth boundary. (0 to 12 inches thick)
Bt2--20 to 36 inches; dark red (2.5YR 3/6) silty clay loam; moderate medium subangular blocky structure; friable; thick patchy clay films on faces of peds; few fine roots; common small black concretions; strongly acid; clear smooth boundary. (0 to 20 inches thick)
Bt3--36 to 42 inches; red (2.5YR 4/8) silty clay loam; moderate medium subangular blocky structure; friable; thin continuous clay films; few fine roots; common small and medium black concretions; few small pebbles of chert; strongly acid; clear smooth boundary. (4 to 10 inches thick)
Bt4--42 to 49 inches; yellowish red (5YR 4/6) silty clay loam; moderate fine and medium angular blocky structure; firm; thin continuous clay films; common small black concretions; strongly acid; gradual smooth boundary. (5 to 10 inches thick)
Bt5--49 to 59 inches; yellowish red (5YR 4/6) silty clay loam; common fine and medium distinct strong brown (7.5YR 4/4) and dark red (2.5YR 3/6) mottles; moderate medium angular blocky structure; firm; thin continuous clay films; common small black concretions; few small pebbles of chert; strongly acid; gradual smooth boundary. (8 to 15 inches thick)
2Bt6--59 to 70 inches; strong brown (7.5YR 5/6) clay; few fine and medium distinct yellowish red (5YR 4/6) mottles; weak medium angular blocky structure; firm and plastic; discontinuous clay films on faces of peds; common small black concretions; few fragments of chert less than 1 inch across; medium acid.
TYPE LOCATION: Rutherford County, Tennessee; 1 mile north of Murfreesboro on Highway 231; 3/4 mile west of Highway 231; 120 feet north of fence bordering graded road.
RANGE IN CHARACTERISTICS: Depth to hard limestone bedrock and thickness of solum range from 5 to 8 feet or more. Depth to the IIB horizon, which commonly is the same as the thickness of loess and alluvium, ranges from 40 to 70 inches. The soil is dominantly strongly acid, but ranges to slight acid. The amount of weatherable minerals in the silt and sand fraction ranges from about 2 to 10 percent. Coarse fragment range from 0 to 5 percent in the A and B horizons and 0 to 10 in the 2B horizon.
The A horizon has hue of 10YR to 5YR, value of 3 and chroma of 2 to 4. It is mostly silt loam, but is also silty clay loam in some severely eroded areas.
Some pedons have AB or BA horizons that are transitional in color and texture to the A and B horizon.
The Bt horizon has hue of 5YR or 2.5YR, value of 4 and chroma of 4 to 8 or hue of 2.5YR, value of 3 and chroma of 6. It is mostly silty clay loam, but ranges to silt loam in the upper part and to silty clay or clay in the lower part.
The 2Bt horizon has hue of 10YR or 7.5YR, value of 5 and chroma of 4 to 8 or hue of 5YR, value of 5 and chroma of 6. Mottles are in shades of brown, red and gray. This horizon is silty clay or clay.
COMPETING SERIES: Lomond is the only soil in this family. Soils in closely related families are the Crider, Etowah, and Pembroke series. Crider and Pembroke soils have temperatures less than 59 degrees F., and the amount of weatherable minerals in the silt and sand fractions exceeds 10 percent. Etowah soils have less than 35 percent base saturation at 50 inches below the top of the B horizon and more than 15 percent fine and coarser sand in the control section.
GEOGRAPHIC SETTING: Lomond soils are on nearly level to rolling uplands. These soils have 0 to 12 percent slopes. The landscape on which Lomond soils are located is marked by occasional outcrops of limestone and by sinks and depressions. At the type location, mean annual air temperature is 59 degrees F., and mean annual precipitation is 50 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cumberland series on the adjacent uplands, and the Arrington and Emory series on the bottomlands. Cumberland soils are finer-textured than Lomond soils. Arrington and Emory soils lack an argillic horizon.
DRAINAGE AND PERMEABILITY: Lomond soils are well drained; medium runoff; moderate permeability.
USE AND VEGETATION: These soils are used to grow hay, pasture, small grains, corn, tobacco, cotton, and soybeans. A small amount is in forest consisting of mixed hardwoods.
DISTRIBUTION AND EXTENT: Nashville Basin in Tennessee. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Rutherford County, Tennessee; 1972
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from 0 to 9 inches (Ap, AB horizons)
Argillic horizon - from 9 to 70 inches (Bt1-2Bt6)
Lithologic discontinuity - at 59 inches (upper contact of 2Bt6)