LOCATION PINE FLAT AL
PINE FLAT SERIES
The Pine Flat series consists of deep, well drained, moderately rapidly permeable soils that formed in loamy marine sediments. These upland soils have slopes that range from 0 to 10 percent.
TAXONOMIC CLASS: Coarse-loamy, siliceous, subactive, thermic Rhodic Paleudults
TYPICAL PEDON: Pine Flat sandy loam--cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; dark brown (7.5YR 3/2) sandy loam, brown (7.5YR 4/2) dry; weak fine granular structure; very friable; moderately acid; abrupt smooth boundary. (5 to 12 inches thick)
B1--8 to 12 inches; dark reddish brown (2.5YR 3/4) sandy loam, dark reddish brown (2.5YR 3/4) dry; weak medium subangular blocky structure; very friable; most sand grains coated and bridged with clay; strongly acid; gradual smooth boundary. (4 to 8 inches thick)
B21t--12 to 37 inches; dark red (2.5YR 3/6) sandy loam, dark red (2.5YR 3/6) dry; weak medium subangular blocky structure; friable; few very thin patchy clay films on surfaces of peds; sand grains well coated and bridged with clay; strongly acid; diffuse smooth boundary. (16 to 40 inches thick)
B22t--37 to 56 inches; dark red (2.5YR 3/6) sandy clay loam, red (2.5YR 4/6) dry; weak medium subangular blocky structure; friable; few very thin patchy clay films on surfaces of peds; sand grains well coated and bridged with clay; very strongly acid; diffuse smooth boundary. (15 to 40 inches thick)
B23t--56 to 80 inches; red (2.5YR 4/8) sandy loam, red (2.5YR 5/8) dry; weak medium subangular blocky structure; friable; sand grains coated and bridged with clay; very strongly acid.
TYPE LOCATION: Autauga County, Alabama; 2 miles south of Pleasant Hill Church in the NW1/4, NW1/4, SW1/4, sec. 3, T. 19 N., R. 14 E.
RANGE IN CHARACTERISTICS: Solum thickness is 60 to more than 80 inches.
The A horizon has hue of 2.5YR to 7.5YR, value of 3, and chroma of 2 through 4. Texture is sandy loam, fine sandy loam, loamy fine sand, or loamy sand. Reaction ranges from slightly acid to strongly acid.
The B1 horizon and the upper part of the B2t horizon has hue of
10R, 2.5YR, or 5YR, value of 3, and chroma of 4 or 6. Texture is fine sandy loam, sandy loam, or loam with 8 to 18 percent clay and 10 to 40 percent silt. Reaction ranges from medium acid to strongly acid. Base saturation ranges from 20 to 45 percent with 0.5 to 2 meq. calcium per 100 gms soil.
The lower part of the B2t horizon has hue of 10R, 2.5YR, or 5YR; value of 3 through 5; and chroma of 6 or 8. Texture is sandy loam, loam, or sandy clay loam. Reaction ranges from medium acid to very strongly acid. Base saturation is less than 20 percent with less than 1 meq. calcium per 100 gms soil.
COMPETING SERIES: There are no other known series in the same family. Competing series in related families are the
Smithdale series. Americus and Eustis soils have textures of loamy fine sand or coarser in the B2t horizon. Also, Eustis soils have B horizons with color value of 4 or more. Bama, Lucedale, Orangeburg, Red Bay, Ruston, and Smithdale soils have B2t horizons with 18 to 35 percent clay. Heidel soils have B horizons with color value of 4 or more. Lucy soils have sandy A horizons 20 to 40 inches thick.
GEOGRAPHIC SETTING: These soils are on uplands of the Coastal Plains. Slopes range from 0 to about 10 percent. The regolith is loamy or sandy marine deposits. The climate is warm and humid. Near the type location the average January temperature is 49 degrees F., the average July temperature is 81 degrees F., the mean annual temperature is about 65 degrees F., and the mean annual precipitation is about 54 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing
Red Bay, and
Ruston series, and the
Troup series. Greenville soils have B2t horizons with more than 35 percent clay. Troup soils have sandy A horizons more than 40 inches thick.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderately rapid and runoff is slow.
USE AND VEGETATION: Much of the soil is in forest of poor stands of longleaf and loblolly pine mixed with scrub oak, dogwood, hickory, huckleberry bush, and other low moisture requiring hardwoods. The more gently sloping areas are cleared and used for growing corn, cotton, truck crops, small grain, and pasture.
DISTRIBUTION AND EXTENT: Middle and lower Coastal Plains of Alabama, Florida, Louisiana, Mississippi, North Carolina, South Carolina, and possibly Tennessee and Texas. This series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.
SERIES ESTABLISHED: Autauga County, Alabama; 1972.
National Cooperative Soil Survey