LOCATION MASHULAVILLE MS+AL AREstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, active, thermic Typic Fragiaquults
TYPICAL PEDON: Mashulaville loam--cultivated.
(Colors are for moist soil unless otherwise stated.)
Ap--0 to 5 inches; dark gray (10YR 4/1) loam; weak fine granular structure; slightly hard, very friable; many fine fibrous roots; strongly acid; abrupt smooth boundary. (4 to 9 inches thick)
Eg1--5 to 9 inches; light gray (10YR 7/1) loam; common fine and medium faint mottles of light brownish gray (10YR 6/2), and few fine distinct yellowish brown (10YR 5/6) mottles; weak coarse granular structure; hard, friable; many fine roots; common fine brown and black concretions; strongly acid; clear wavy boundary.
Eg2--9 to 19 inches; light gray (10YR 7/1) loam, many fine and medium faint pale brown (10YR 6/3), and distinct yellowish brown (10YR 5/6) mottles; weak medium subangular blocky structure; hard, friable; few fine pores in lower part; few fine and medium brown and black concretions; strongly acid; clear wavy boundary.
Egx--19 to 26 inches; light gray (10YR 7/1) loam; many medium and coarse faint pale brown (10YR 6/3), and distinct yellowish brown (10YR 5/6) mottles; moderate medium subangular blocky structure; hard, slightly compact and brittle; many fine pores; few brown and black concretions; strongly acid; gradual wavy boundary. (Combined thickness of the E horizon is from 12 to 26 inches)
Btx1--26 to 42 inches; mottled gray (10YR 5/1), and yellowish brown (10YR 5/8) clay loam; weak coarse prismatic structure parting to strong medium subangular blocky; firm, brittle and compact; nearly continuous clay films on faces of peds; seams of gray sandy loam between prisms; strongly acid; gradual wavy boundary. (10 to 25 inches thick)
Btx2--42 to 62 inches; mottled light gray (10YR 6/1), and yellowish brown (10YR 5/8) clay loam; weak coarse prismatic structure parting to strong coarse subangular blocky; firm, brittle and compact; patchy clay films on face of peds; seams of gray sandy loam between prisms; strongly acid.
TYPE LOCATION: Clarke County, Mississippi; one mile west of Harmony Baptist Church on State Highway 18, then south 0.5 mile on local road, then 200 yards east of local road.
RANGE IN CHARACTERISTICS: The solum is more than 60 inches thick. Depth to the fragipan ranges from 16 to 34 inches. The soil is very strongly acid or strongly acid throughout, except the surface layer in areas that have been limed. In some pedons brown and black concretions range from few to many in all horizons.
The A horizon commonly has hue of 10YR, value of 4 to 6, and chroma of 1 or 2. Some pedons have a thin A horizon with hue of 10YR, value of 3, and chroma of 1 or 2. It is fine sandy loam, sandy loam, silt loam, or loam.
The E horizon has hue of 10YR, value of 4 to 7, and chroma of 1 or 2, or it has hue of 2.5Y, value of 4 to 6, and chroma of 2; and, mottles commonly are few to many in shades of gray or brown. It is fine sandy loam, sandy loam, silt loam, or loam. The particle size control section, from a depth of 10 inches to the top of the fragipan, has 8 to 18 percent clay and more than 32 percent silt.
The Btx horizon is mottled in shades of gray and brown, or it has a matrix in hue of 10YR, value of 4 to 7, and chroma of 1 or 2 or hue of 2.5 Y, value of 4 to 6, and chroma of 2, with mottles in shades of gray and brown. It is silt loam, loam, clay loam, or sandy clay loam.
COMPETING SERIES: Toisnot is the only other series in the same family. Closely related series include the Atmore, Guthrie, Henry, Myatt, Smithton, Stough, and Trebloc series. Toisnot soils have less silt or very fine sand in all horizons and less clay in the fragipan. Atmore soils have more than 5 percent plinthite and do not have fragipan. Guthrie soils have a fine-silty particle size class. Henry soils have base saturation of more than 35 percent and have a coarse-silty particle size class. Myatt, Smithton, and Trebloc soils do not have a fragipan. Stough soils are somewhat poorly drained and are brittle and compact in less than 55 percent of the volume of the lower part of the subsoil.
GEOGRAPHIC SETTING: Mashulaville soils are on broad flats and in depressions on stream terraces and uplands of the Southern Coastal Plain Major Land Resource Area. These are nearly level to very gently sloping soils that formed in loamy sediments. Slopes range from 0 to 3 percent. The climate is warm and humid. Near the type location the mean annual temperature is about 64 degrees Fahrenheit and the mean annual precipitation is about 59 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Myatt, Smithton, and Stough series of the competing series and the Bibb, Mantachie, Prentiss, and Savannah soils. Poorly drained Myatt and Smithton soils are in similar positions as the Mashulaville soils. Somewhat poorly drained Stough soils are in slightly higher positions. Poorly drained Bibb and somewhat poorly drained Mantachie soils, which do not have a diagnostic subsurface horizon, are in lower positions on flood plains. The moderately well drained Prentiss and Savannah soils, which have browner colors, are in higher positions on terraces and uplands.
DRAINAGE AND PERMEABILITY: Poorly drained; slow runoff; slow permeability. Water is perched above the fragipan and is within a depth of 0.5 to 1.0 foot of the surface during wet seasons from January to April.
USE AND VEGETATION: Most areas are in woodland or pasture; some are cleared and used for growing soybeans, hay, and pasture. Common forest trees are water oak, sweetgum, and loblolly pine.
DISTRIBUTION AND EXTENT: Alabama, Arkansas, Louisiana, and Mississippi. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Clarke County, Mississippi; 1963.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface to a depth of about 5 inches (Ap horizon).
Fragipan - the zone from approximately 26 to 62 inches (Btx1, Btx2 horizons).
Typic Fragiaquults features - dominant chroma of 2 or less in all horizons between the Ap horizon and the fragipan (Eg1, Eg2, Eg3 horizons).
ADDITIONAL DATA: Laboratory data for two pedons were obtained from the Soil Genesis and Morphology Laboratory of the Mississippi Agricultural and Forestry Experiment Station, Mississippi State, Mississippi.