LOCATION BRILEY TX+AR LAEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, semiactive, thermic Arenic Paleudults
TYPICAL PEDON: Briley loamy fine sandy, on a smooth convex 3 to 4 percent slope, in woodland. (Colors are for moist soil unless otherwise stated.)
A--0 to 5 inches; brown (10YR 4/3) loamy fine sand; weak fine granular structure; soft, very friable; many fine, medium and coarse roots; moderately acid; clear wavy boundary. (4 to 14 inches thick)
E1--5 to 17 inches; brown (10YR 5/3) loamy fine sand; single grained; soft, very friable; common fine, medium and coarse roots; moderately acid; clear smooth boundary. (7 to 22 inches thick)
E2--17 to 23 inches; pale brown (10YR 6/3) loamy fine sand; singled grained; soft, very friable; common medium and coarse roots; strongly acid; gradual wavy boundary. (0 to 15 inches thick)
Bt1--23 to 43 inches; yellowish red (5YR 4/8) sandy clay loam; medium fine subangular blocky structure; slightly hard, friable; few patchy clay films on faces of peds; few fine and medium roots; very strongly acid; gradual wavy boundary. (4 to 25 inches thick)
Bt2--43 to 80 inches; yellowish red (5YR 5/8) sandy clay loam; common medium distinct strong brown (7.5YR 5/6) and red (2.5YR 4/6) mottles; weak subangular blocky structure; slightly hard, friable; few thin patchy clay films on faces of peds; few fine and medium roots; very strongly acid.
TYPE LOCATION: Nacogdoches County, Texas; about 15 miles northeast of Nacogdoches on U.S. Highway 259 to the intersection of Farm Road 1087, 7.6 miles east on Farm Road 1087 to Mt. Union Church, 0.3 mile south on dirt road to Walnut Grove Church, 50 feet east in woods.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to more than 80 inches. The soil is dry in the moisture control section for 75 to 90 cummulative days in most years. Base saturation at a depth of 72 inches ranges from 15 to 35 percent. Ironstone pebbles range from none to about 5 percent by volume throughout the solum.
The A horizon has hue of 7.5YR or 10YR, value of 4 or 5, chroma of 2 to 4. The E horizon is 1 to 3 units of value greater than the A horizon. Reaction ranges from very strongly acid to slightly acid.
A reddish or brownish BE horizon is present in some pedons. Typically it is loamy fine sand or fine sandy loam and less than 7 inches thick. It is very strongly acid to moderately acid.
The Bt horizon has hue of 2.5YR or 5YR, value of 4 or 5, chroma of 6 or 8. Some pedons have hue of 7.5YR in the lower part. Mottles in shades of red, brown, or yellow range from none to common in the upper part. Some pedons have a mottled matrix of these colors in the lower part. It is sandy clay loam, fine sandy loam or loam. The clay content of control section ranges from 18 to 28 percent. Some pedons contain up to 4 percent plinthite in the lower part with or without streaks or pockets of uncoated sand. Reaction ranges from very strongly acid to moderately acid.
COMPETING SERIES: These are the Autryville, Bonneau, Boykin, Letney, Lovett, Lowndes, Rosalie, and Trep series in the same family and the closely similar, Lilbert, Larue, and Tenaha soils. Autryville, Bonneau, Lilbert, Letney, Lovett, Rosalie, and Trep soils have Bt1 horizons with hue yellower than 5YR. In addition, Autryville soils have a bisequal profile; Rosalie soils have uncoated sand in the upper Bt horizon. Trep soils have more clay in the lower layers; Lilbert soils have 5 percent or more plinthite. Boykin soils formed in Pleistocene Age sediments and are assumed to have different chemistry and kinds of clays. Lowndes soils have bisequal profiles. Larue soils have base saturation of more than 35 percent. Tenaha soils have sola less than 60 inches thick over sandstone.
GEOGRAPHIC SETTING: Briley soils are on broad nearly level to moderately steep interstream divides. They formed in sandy and loamy Coastal Plain sediments of Tertiary age. Slopes are mainly 2 to 5 percent but range from 1 to 20 percent. Mean annual rainfall ranges from 40 to 48 inches and is evenly distributed throughout the year. Frost free days range from 240 to 275 days and elevation ranges from 350 to 600 feet above sea level. Mean annual temperature ranges from 64 degrees to 69 degrees F., and the Thornthwaite P-E indices exceed 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Lilbert, and Tenaha series and the Bowie, Darco, Ruston, and Tonkawa soils. Bowie and Ruston soils have loamy surface layers less than 20 inches thick and are on lower positions. Darco and Tonkawa soils have sandy surface layers more than 40 inches thick and are on similar positions. Lilbert soils are also on similar positions. Tenaha soils are typically on lower positions.
DRAINAGE AND PERMEABILITY: Briley soils are well drained. Runoff is very low to low, and permeability is moderate.
USE AND VEGETATION: Used mainly for woodlands of loblolly and shortleaf pine and for pastures of improved bermudagrass.
DISTRIBUTION AND EXTENT: Arkansas, western Louisiana, eastern Texas, and possibly Oklahoma. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Little Rock, Arkansas
SERIES ESTABLISHED: Hempstead County, Arkansas; 1976.
REMARKS: These soils were formerly included in the Ruston or Lucy series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface to a depth of approximately 23 inches (A, E1, E2 horizons)
Argillic horizon - the zone from approximately 23 to 80 inches (Bt1, Bt2 horizons)