LOCATION CLODINE TXEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, active, hyperthermic Typic Epiaqualfs
TYPICAL PEDON: Clodine loam - pasture.
(Colors are for moist soil unless otherwise stated.)
Ap--0 to 10 inches; dark gray (10YR 4/1) loam, gray (10YR 6/1) dry; weak coarse subangular blocky structure; hard, friable; many fine roots; many fine pores; many wormcasts; few fine iron-manganese masses; neutral; gradual smooth boundary. (7 to 20 inches thick)
Btg1--10 to 24 inches; gray (10YR 5/1) loam, light gray (10YR 7/1) dry; weak medium subangular blocky structure; very hard, friable; common fine roots; many fine pores; many wormcasts; common distinct clay films on surfaces of peds and on pore walls; many fine iron-manganese masses; slightly acid; gradual wavy boundary. (8 to 20 inches thick)
Btg2--24 to 35 inches; gray (10YR 6/1) loam; moderate medium and fine subangular blocky and blocky structure; very hard, friable; few fine pores; few wormcasts; common distinct gray clay films on peds; 10 percent by volume of indurated, pitted calcium carbonate concretions less than 1 inch in size; few fine distinct brownish yellow linings around calcium carbonate concretions; many fine iron-manganese masses; moderately alkaline; gradual irregular boundary. (6 to 20 inches thick)
Btg3--35 to 60 inches; light gray (5Y 7/2) loam, moderate medium and fine blocky and subangular blocky structure; very hard, friable; few fine pores; common distinct gray clay films on peds; 10 percent by volume of indurated; pitted calcium carbonate concretions less than 1 inch in size; few fine distinct brownish yellow linings around calcium carbonate concretions; many fine iron-manganese masses; moderately alkaline; gradual irregular boundary. (15 to 30 inches thick)
Btg4--60 to 85 inches; light brownish gray (2.5Y 6/2) loam; weak medium and fine subangular blocky and blocky structure; very hard, friable; few distinct clay films on peds; common, indurated, pitted calcium carbonate concretions; many fine iron-manganese masses; moderately alkaline; gradual irregular boundary. (15 to 35 inches thick)
Cg--85 to 105 inches; light brownish gray (2.5Y 6/2) clay loam; massive, very hard, friable; many medium and coarse masses of iron-manganese oxide; few lenses or pockets of very pale brown (10YR 7/3) loamy fine sand; moderately alkaline.
TYPE LOCATION: Fort Bend County, Texas; 4.1 miles west of Clodine on Farm Road 1093, 1.8 miles north in pasture. Site is 0.5 mile north of ranch house or 0.25 mile north of Buffalo Bayou.
RANGE IN CHARACTERISTICS: The solum is more than 80 inches thick.
The A horizon has hue of 10YR to 5Y, value of 4 to 6, and chroma of 1 or less. Texture is loam or fine sandy loam. Reaction ranges from slightly acid to slightly alkaline.
The Btg horizons have hue of 10YR to 5Y, value of 5 to 7, and chroma of 2 or less. Most pedons contain few to common, fine to medium iron concentration of brown and yellow. Texture is loam or fine sandy loam containing 12 to 18 percent clay, 20 to 45 percent silt and more than 15 percent sand coarser than very fine sand. Between 20 and 60 inches the soil contains 2 to 15 percent indurated pitted concretions of calcium carbonate. The upper Btg horizon has reaction ranging from slightly acid to moderately alkaline. The lower Btg horizon has reaction ranging from neutral to moderately alkaline.
COMPETING SERIES: These are no other series in this family. Similar soils are the Sorter, Addicks, Algoa, Gessner, Leton, and Waller soils. Sorter soils are very strongly acid to moderately acid in the upper Bt and are Vermaqualfs. Leton soils have a fine-silty particle-size and have a glossic horizon. Addicks and Algoa soils have a mollic epipedon and also, Algoa has a fine-loamy particle-size control section. Gessner soils have a glossic horizon. Waller soils have a fine-loamy particle-size control section, and have a glossic horizon.
GEOGRAPHIC SETTING: Clodine soils are on broad nearly level Gulf Coastal Prairies. Slopes are mainly less than 1 percent. Clodine soils formed in loamy sediments of Pleistocene Age. The mean annual temperature ranges from about 63 to 70 degrees F. Mean annual precipitation ranges from 40 to 60 inches. Frost-free days range from 265 to 330. Elevation ranges from 20 to 150 feet. Thornthwaite annual P-E indices ranges from 64 to 82.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Addicks, Gessner, and Waller soils of the competing series and the Bernard, Edna, Katy and Lake Charles series. Bernard and Edna soils have a fine particle-size control section. Katy soils are not dominated by chroma 2 or less in the Bt horizon. Lake Charles soils are clayey and have slickensides.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is negligible. Permeability is moderate. The soil is saturated for periods of 3 to 6 months during winter and spring.
USE AND VEGETATION: Used mainly for native range and for growning rice. Native grasses are mainly species of Andropogon, Paspalum, and Panicum. Myrtle (Myrica cerifera) bushes are common. Mixed pine and oak forests have encroached on some areas.
DISTRIBUTION AND EXTENT: Gulf Coast Prairie (MLRA 150A) of Texas, mainly east of the Brazos River. The series is extensive.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Fort Bend County, Texas; 1956.
REMARKS: Classification changed from Typic Ochraqualfs to Typic Epiaqualfs 11/2000 based on typifying pedon description. Further study and characterization data of the series is needed to verify hydrology and classification.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 10 inches.
Argillic horizon - 10 to 85 inches.
Aquic moisture regime.
ADDITIONAL DATA: None.
TAXONOMIC VERSION: Soil Taxonomy, Second Edition, 1999.