LOCATION LATONIA MS+AL AR LAEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, semiactive, thermic Typic Hapludults
TYPICAL PEDON: Latonia sandy loam--forested.
(Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; grayish brown (10YR 5/2) sandy loam; weak fine and medium granular structure; very friable; common fine and medium roots; very strongly acid; clear smooth boundary. (2 to 6 inches thick)
BA--4 to 8 inches; yellowish brown (10YR 5/4) sandy loam; weak fine subangular blocky structure; friable; few fine and medium roots; few worm casts; few pockets of uncoated sand grains; very strongly acid; clear smooth boundary. (0 to 6 inches thick)
Bt1--8 to 23 inches; yellowish brown (10YR 5/6) sandy loam; weak medium subangular blocky structure; friable; few fine roots; sand grains coated and bridged with clay; few pockets of uncoated sand grains; very strongly acid; gradual smooth boundary.
Bt2--23 to 32 inches; brownish yellow (10YR 6/6) sandy loam; weak coarse subangular blocky structure; very friable; many sand grains coated and bridged with clay; few pockets of uncoated sand grains; very strongly acid; gradual smooth boundary. (Combined thickness of the Bt subhorizons is 18 to 36 inches)
2C1--32 to 67 inches; white (10YR 8/2) sand; common medium distinct strong brown (7.5YR 5/6) and many medium distinct light yellowish brown (10YR 6/4) mottles; single grained; loose; very strongly acid; clear smooth boundary. (20 to 40 inches thick)
2C2--67 to 74 inches; white (10YR 8/2) sand; few medium distinct dark brown (10YR 4/3) mottles; single grained; loose; very strongly acid.
TYPE LOCATION: Lamar County, Mississippi; 3.75 miles north of Purvis on State Highway 11, 775 feet east of first iron gate south of Black Creek Bridge; 30 feet north of woods road. NE1/4SW1/4 sec. 26, T. 3 N., R. 14 W.
RANGE IN CHARACTERISTICS: The thickness of the solum ranges from 20 to 45 inches. Reaction is very strongly acid or strongly acid, except where the soil has been limed. Gravel are none to as much as 10 percent of the volume throughout.
The A horizon has hue of 10YR, value of 3 to 5, and chroma of 1 to 3, or it has hue of 2.5Y, value of 4 or 5, and chroma of 2. Where the value is less than 3.5, the horizon is less than 6 inches thick. It is fine sandy loam, sandy loam, loamy sand, or loamy fine sand.
The E horizon, where present, has hue of 10YR, value of 4 to 6, and chroma of 2 to 6, or it has hue of 2.5Y, value of 6, and chroma of 4. It is sandy loam or fine sandy loam.
The BA and BE horizons, where present, has hue of 10YR, value of 4 or 5, and chroma of 3 to 8, or it has hue of 2.5Y, value 5, and chroma of 4 or 6. It is sandy loam or fine sandy loam.
The Bt horizon has hue of 7.5YR, value of 4 or 5, and chroma of 4 to 6, or it has hue of 10YR, value of 4 to 6, and chroma of 4 to 8, or it has hue of 2.5Y, value of 5 and chroma of 6. It is sandy loam, fine sandy loam, or loam. The Bt horizon has 10 to 16 percent clay and 20 to 35 percent silt.
The C horizon is variable in color and ranges from white to yellowish brown. It is loamy sand or sand.
COMPETING SERIES: These include the Bassfield and Rumford series and the closely related Benndale, Brogdon, Cahaba, Johns, Kalmia, Kenansville, and McLaurin series. Bassfield soils have a Bt horizon in hue of 5YR to 2.5YR. Rumford soils typically have hue of 5YR or redder and have less silt in the Bt horizon. Benndale, Brogdon, and McLaurin soils have a solum thicker than 60 inches. Cahaba and Kalmia soils have a fine loamy particle size class. Johns soils have mottles with chroma of 2 or less within 20 inches of the surface. Kenansville soils have an arenic epipedon.
GEOGRAPHIC SETTING: Latonia soils are on nearly level to sloping marine or streams terraces of the Southern Coastal Plain and Eastern Gulf Coast Flatwoods. They formed in marine or alluvial sediments that are loamy in the upper part and sandy in the lower part. Slopes range from 0 to 5 percent. The climate is warm and humid. Near the type location the average annual temperature is about 62 degrees F. Average annual precipitation is about 48 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Bassfield, Benndale, Cahaba, and McLaurin series and the Atmore, Basin, Prentiss, and Ruston series. Well drained Bassfield and Cahaba soils are in similar portions as the Latonia soils. Well drained Benndale and McLaurin soils are in adjacent uplands. Poorly drained Atmore soils and somewhat poorly drained Basin soils, which are in depressions and on broad flats, have plinthite in the B horizon. Moderately well drained Prentiss soils which are in slightly higher positions on terraces, have a fragipan. Well drained Ruston soils, which are at higher elevations in the uplands, have a solum more than 60 inches thick.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderately rapid permeability. Some areas on lower terraces are subject to occasional flooding for very brief periods late in winter and early in spring.
USE AND VEGETATION: Most areas of the Latonia soils are used for woodland. Principal vegetation is slash, loblolly, and longleaf pine. Cleared areas are used for growing corn, soybeans, small grains, and pasture.
DISTRIBUTION AND EXTENT: Alabama, Arkansas, Louisiana, and Mississippi. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Lamar County, Mississippi; 1969.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from surface to 4 inches (A horizon).
Argillic horizon - the zone from approximately 8 to 32 inches (Bt1 and Bt2).