LOCATION ALMAVILLE TNEstablished Series
TAXONOMIC CLASS: Fine-silty, siliceous, semiactive, thermic Typic Fragiaqualfs
TYPICAL PEDON: Almaville silt loam - cultivated.
(Colors are for moist soil unless otherwise stated.)
Ap--0-5 inches, dark gray (10YR 4/1) silt loam; weak fine granular structure; very friable; many fine roots; common fine very dark grayish brown (10YR 3/2) manganese concretions; few fine distinct gray (10YR 6/1) iron depletions; slightly acid; abrupt smooth boundary. (3 to 10 inches thick)
Eg--5-8 inches, gray (10YR 6/1) silt loam; weak fine and medium platy structure; friable; common fine roots; common fine very dark grayish brown (10YR 3/2) manganese concretions; approximately 2 percent fragments of chert; strongly acid; clear wavy boundary. (0 to 8 inches thick)
Bg1--8-25 inches, gray (10YR 6/1) silt loam; weak fine subangular blocky structure; friable; few fine roots; few fine very dark grayish brown (10YR3/2) manganese concretions; common medium prominent light olive brown (2.5Y 5/6) masses as iron accumulations; approximately 2 percent fragments of chert; strongly acid; clear wavy boundary. (10 to 26 inches thick)
Bg2--25-28 inches, light brownish gray (2.5Y 6/2) siltloam; weak medium platy structure; firm; few fine roots; common medium very dark grayish brown (10YR 3/2) manganese concretions; common fine distinct light olive brown (2.5Y 5/6) masses as iron accumulations; brittle in 40 percent of the mass; strongly acid; clear irregular boundary. (0 to 10 inches thick)
Btx1--28-40 inches, light brownish gray (2.5Y 6/2) silty clay loam; weak very coarse prismatic structure parting to weak medium platy and weak medium angular blocky; few very fine roots along vertical seams; common fine discontinuous tubular pores; common fine prominent gray (10YR 5/1) clay films on faces of prisms and along vertical seams; common medium and coarse light brownish gray (10YR 6/2) silt and silt loam coatings on prism faces and as vertical seams; common medium and coarse black (10YR 2.5/1) and very dark grayish brown (10YR 3/2) manganese concretions; few medium distinct light olive brown (2.5Y 5/6) masses as iron accumulations; brittle in 80 percent of the mass; approximately 2 percent fragments of chert; moderately acid; gradual wavy boundary. (8 to 30 inches thick)
Btx2--40-72 inches, gray (N 6/0) silty clay loam; weak very coarse prismatic structure parting to weak medium platy and angular blocky ; very firm; common fine discontinuous tubular pores; common fine prominent gray (10YR 5/1) clay films on faces of prisms and along vertical seams; common medium and coarse light brownish gray (10YR 6/2) silt coatings on prism faces and as vertical seams; common medium and coarse black (10YR 2.5/1) and very dark grayish brown (10YR 3/2) manganese concretions; many medium prominent strong brown (7.5YR 5/6) and yellowish brown (10YR 5/6) masses as iron accumulations;brittle in 75 percent of the mass; approximately 5 percent fragments of chert; neutral.
TYPE LOCATION: Rutherford County, Tennessee; one mile northeast
of Eagleville; 500 feet north of Swamp Road and 100 feet east of River Road.
RANGE IN CHARACTERISTICS: Depth to limestone bedrock ranges from about 5 to 10 feet. Depth to the fragipan ranges from 20 to 36 inches. Fragments of chert range from about 0 to 5 percent in each horizon. Reaction is strongly acid to slightly acid in the Ap, Eg, and Bg horizons, and strongly acid to slightly alkaline in the Btx horizon.
The A and Ap horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 or less. Some undisturbed pedons have a very dark gray (10YR 3/1) A horizon, 1 to 5 inches thick. Texture is silt loam.
The Eg horizon has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 1 or 2. Redoximorphic features range from few to common in shades of brown and black. Texture is silt loam.
The Bg horizon has hue of 10YR to 5Y, value of 5 to 7, and chroma or 2 or less or is neutral. Many pedons have few to many redoximorphic features in shades of brown and black. Texture is silt loam.
The Btxg horizon has hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 2 or less. The horizon has few to many redoximorphic features in shades of yellow, brown, or black. Texture is silt loam or silty clay loam.
COMPETING SERIES: Almaville is the only series in this family. Series in closely associated families are the Guthrie, Almo, Henry, Mullins, and Robertsville series. Robertsville and Mullins series are mesic. Almo has mixed mineralogy. Guthrie soils have less than 35 percent base saturation at 30 inches below the top of the fragipan.
GEOGRAPHIC SETTING: Almaville soils are on low stream terraces. Slopes range from 0 to 2 percent. The soil formed in either silty alluvium or a thick mantle of loess that is underlain in places by clayey limestone residuum. Near the type location, the mean annual temperature is 58.1 degrees F. and the average annual precipitation is 53.1 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Capshaw, Dowellton, and Tupelo soils. Capshaw is moderately well drained and Tupelo soils are somewhat poorly drained, are on low stream terraces, and have clayey B horizons. Dowellton soils are poorly drained, are also in slight depressions on low stream terraces and are clayey.
DRAINAGE AND PERMEABILITY: Poorly drained; runoff is negligible to slow; and permeability is slow or very slow. Many areas are subject to ponding for long periods in winter and spring.
USE AND VEGETATION: About 75 percent of the soils have been cleared and are used chiefly for crops and pasture. Principal crops are soybeans, grain sorghum, and hay. Forested areas are chiefly in oaks, gums, hackberry, elms, redcedar, and hickory trees.
DISTRIBUTION AND EXTENT: The Nashville Basin of Tennessee. The series is of very small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Rutherford County, Tennessee; l974.
REMARKS:
Diagnostic horizons recognized in this pedon are:
Ochric epipedon - 0 to 8 inches (A and E horizon)
Fragipan- 28 to 72 inches (Btxg1 and Btxg2 horizons)
Argillic horizon - 28 to 72 (Btxg1 and Btxg2 horizons)