LOCATION AGEE TNEstablished Series
TAXONOMIC CLASS: Fine, smectitic, thermic Vertic Endoaquolls
TYPICAL PEDON: Agee silty clay loam, 1 percent slope--pasture. (Colors are for moist soil.)
Ap--0 to 9 inches; very dark grayish brown (2.5Y 3/2) silty clay loam; moderate medium subangular blocky and moderate medium granular structure; friable; many fine roots; many fine pores; common medium and fine black (N2.5/0) manganese soft accumulations and concretions; many fine distinct olive brown (2.5Y 4/4) iron accumulations; slightly acid; abrupt wavy boundary.
A1--9 to 16 inches; very dark gray (10YR 3/1) silty clay; moderate medium subangular blocky and angular blocky structure; firm; many fine roots; many fine pores; common medium and fine black (N2.5/0) manganese accumulations and concretions; few fine distinct very dark gray (N3/0) iron depletions; slightly acid; clear smooth boundary.
A2--16 to 21 inches; black (10YR 2/1) silty clay; moderate medium subangular blocky structure; firm; few fine roots; common fine pores; shiny ped faces; common medium and fine black (N2.5/0) manganese accumulations and concretions; few fine faint dark gray (2.5Y 4/1) iron depletions and common fine prominent yellowish brown (10YR 5/6) masses of iron accumulation; slightly acid; clear smooth boundary. (Combined thickness of the A horizon ranges from 10 to 24 inches.)
Bg1--21 to 29 inches; grayish brown (2.5Y 5/2) clay; weak medium prismatic structure parting to moderate medium angular blocky; very firm; few fine roots; few fine pores; common medium and fine black (N2.5/0) manganese accumulations and concretions; common medium distinct dark gray (10YR 4/1) iron depletions; common medium prominent yellowish brown (10YR 5/8) masses as iron accumulation; slightly acid; clear smooth boundary.
Bg2--29 to 53 inches; grayish brown (2.5Y 5/2) clay; weak medium angular blocky structure; extremely firm; common fine and medium black (N2.5/0)manganese accumulations and concretions; common medium distinct dark gray (10YR 4/1) iron depletions; common medium prominent yellowish brown (10YR 5/8) masses as iron accumulation; neutral; clear smooth boundary. (Combined thickness of the Bg horizon ranges from 15 to 40 inches.)
Cg--53 to 60 inches; gray (10YR 5/1) clay; massive; extremely firm; common fine and medium black (N2.5/0) manganese accumulations and concretions; few fine faint dark gray (2.5Y 4/1) iron depletions; common medium prominent yellowish brown (10YR 5/8) masses as iron accumulation; neutral.
TYPE LOCATION: Wilson County, Tennessee; from Lebanon square 0.5 mile north on U. S. Highway 231 to Coles Ferry Pike, northwest on Coles Ferry Pike 2 miles to Hartman Drive, southwest on Hartman Drive to Alhambra Drive, west on Alhambra Drive to Carver Lane, north 0.5 mile on Carver Lane to private drive, 300 yards southeast of farm house. USGS Quad: (unknown); latitude: (unknown); longitude (unknown)
RANGE IN CHARACTERISTICS: Depth to bedrock is greater than 60 inches. Reaction ranges from mildly alkaline to moderately acid in each horizon. The mollic epipedon ranges from 10 to 24 inches in thickness. Coarse fragments are normally absent, but some pedons have up to 5 percent of small limestone fragments or gravel. COLE values range from 0.07 to 0.095 in all layers to a depth of 40 or more inches.
The A and Ap horizons have hue of 10YR or 2.5Y, value of 2 or 3 and chroma of 1 or 2. In some pedons the Ap horizon also has a chroma of 3. Redoximorphic features are in shades of gray or brown. Texture is silty clay loam, silty clay or clay.
The Bg horizon has hue of 10YR, 2.5Y, or 5Y, value of 4 to 6, and chroma of 2 or less. Redoximorphic features of higher chroma range from few to many. Texture is silty clay or clay.
The Cg horizon, and BC or CB horizons where present, have the same colors and textures as the Bg horizon or is an evenly mottled pattern without a dominant matrix color.
COMPETING SERIES: The
Dospalos and
Portageville series are the only other soils in this family. Dospalos soils are in a climate with a mean annual precipitation of 11 inches and the soil formed in mixed alluvium from granitic sources. The Portageville soils formed in Mississippi River Delta alluvium and exhibit distinct stratification in the upper 48 inches
GEOGRAPHIC SETTING: Agee soils are on broad, flat areas in limestone valleys or less commonly on low stream terraces and flood plains along secondary streams. The soil formed in clayey alluvium or alluvium and the underlying clayey residuum of limestone. The average annual temperature is about 58 degrees F., and the average annual precipitation is about 52 inches near the type location.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Eagleville, Capshaw, Egam, Godwin and Talbott series. Capshaw soils are on adjacent terraces. They have an argillic horizon and do not have a mollic epipedon. Egam and Godwin soils are on flood plains, are better drained, and have mollic epipedons greater than 24 inches thick. Talbott soils are on adjacent uplands have an argillic horizon and are 20 to 40 inches to bedrock.
DRAINAGE AND PERMEABILITY: Poorly drained, very slow permeability; very slow to slow runoff. Some level and slightly concave areas are ponded for a few days during periods of high rainfall. This soil is rarely flooded except in some areas near streams are occasionally flooded for brief periods.
USE AND VEGETATION: Most areas are cleared and used for hay and pasture, soybeans and corn. Native vegetation was a mixture of canebrakes and hardwood trees including oak, sycamore, sweetgum, maple, willow and ash.
DISTRIBUTION AND EXTENT: The Nashville Basin in Tennessee. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Wilson County, Tennessee; 1989
REMARKS: These soils were formerly correlated in the Roellen series in Middle Tennessee. The Roellen series is on flood plains of the major rivers in West Tennessee, Arkansas, etc.
Laboratory data from Beltsville, Maryland is available on one pedon. It supports smectitic mineralogy and a Vertic subgroup. Field measurements support a Vertic subgroup. COLE ranges from 0.07 to 0.095.
Diagnostic horizons in this pedon are:
Mollic epipedon - 0 to 21 inches (A horizon)
Cambic horizon - 21 to 53 inches (Bg horizon)