Mabank soil series
Profile of Mabank fine sandy loam, 0 to 1 percent slopes. The contact of the light-colored surface layer and the dark-colored subsoil is abrupt. (Soil Survey of Lee County, Texas; by Maurice R. Jurena, USDA-Natural Resources Conservation Service)
The Mabank series consists of very deep, moderately well drained, very slowly permeable soils that formed in alkaline clays. These soils are on nearly level to gently sloping terraces or remnants of terraces associated with uplands. Slopes are mainly less than 1 percent but range from 0 to 5 percent.
TAXONOMIC CLASS: Fine, smectitic, thermic Oxyaquic Vertic Paleustalfs
Solum thickness ranges from 60 to more than 80 inches. Weighted average clay content of the upper 20 inches of the argillic horizon ranges from 35 to 50 percent. When dry, cracks at least 1/4 inch wide extend from the top of the argillic horizon through a thickness of 12 inches or more within the upper 50 inches of the soil. Slickensides and/or wedge-shaped aggregates and pressure faces range from few to common and occur throughout the argillic horizon. Linear extensibility is greater than 2.5 inches (6.0 cm) in the upper 40 inches (100 cm) of the soil. COLE ranges from 0.07 to 0.10 inches in the upper 50 inches of the argillic. Siliceous and/or ironstone pebbles range from few to about 3 percent of some subhorizons. Redox features are both relic and contemporary. The soil does not have aquic soil conditions in most years.
USE AND VEGETATION: Used for growing corn, cotton, grain sorghums, and small grain, but much of the acreage is now idle or in improved bermudagrass pastures. Native vegetation is tall prairie grasses such as little bluestem, indiangrass, switchgrass, and gramas; and scattered elm, hackberry, mesquite, and honey locust trees.
DISTRIBUTION AND EXTENT: Mainly in the Blackland Prairies (MLRA 86A, 86B) and Texas Claypan (MLRA 87A) areas of Central Texas. The series is of large extent. Classification change Udertic Paleustalfs to Oxyaquic Vertic Paleustalfs based on knowledge that these soils are saturated for 2 to 4 weeks in most years. This period of time is within the definition of saturation for one month or more if rules of rounding are applied, i.e., 2 to 6 weeks saturation is considered inclusive. The soil would classify in the Epioxyaquic subgroup if provided for by SOIL TAXONOMY.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX287/0/...
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/M/MABANK.html
For acreage and geographic distribution, visit:
casoilresource.lawr.ucdavis.edu/see/#mabank
Mabank soil series
Profile of Mabank fine sandy loam, 0 to 1 percent slopes. The contact of the light-colored surface layer and the dark-colored subsoil is abrupt. (Soil Survey of Lee County, Texas; by Maurice R. Jurena, USDA-Natural Resources Conservation Service)
The Mabank series consists of very deep, moderately well drained, very slowly permeable soils that formed in alkaline clays. These soils are on nearly level to gently sloping terraces or remnants of terraces associated with uplands. Slopes are mainly less than 1 percent but range from 0 to 5 percent.
TAXONOMIC CLASS: Fine, smectitic, thermic Oxyaquic Vertic Paleustalfs
Solum thickness ranges from 60 to more than 80 inches. Weighted average clay content of the upper 20 inches of the argillic horizon ranges from 35 to 50 percent. When dry, cracks at least 1/4 inch wide extend from the top of the argillic horizon through a thickness of 12 inches or more within the upper 50 inches of the soil. Slickensides and/or wedge-shaped aggregates and pressure faces range from few to common and occur throughout the argillic horizon. Linear extensibility is greater than 2.5 inches (6.0 cm) in the upper 40 inches (100 cm) of the soil. COLE ranges from 0.07 to 0.10 inches in the upper 50 inches of the argillic. Siliceous and/or ironstone pebbles range from few to about 3 percent of some subhorizons. Redox features are both relic and contemporary. The soil does not have aquic soil conditions in most years.
USE AND VEGETATION: Used for growing corn, cotton, grain sorghums, and small grain, but much of the acreage is now idle or in improved bermudagrass pastures. Native vegetation is tall prairie grasses such as little bluestem, indiangrass, switchgrass, and gramas; and scattered elm, hackberry, mesquite, and honey locust trees.
DISTRIBUTION AND EXTENT: Mainly in the Blackland Prairies (MLRA 86A, 86B) and Texas Claypan (MLRA 87A) areas of Central Texas. The series is of large extent. Classification change Udertic Paleustalfs to Oxyaquic Vertic Paleustalfs based on knowledge that these soils are saturated for 2 to 4 weeks in most years. This period of time is within the definition of saturation for one month or more if rules of rounding are applied, i.e., 2 to 6 weeks saturation is considered inclusive. The soil would classify in the Epioxyaquic subgroup if provided for by SOIL TAXONOMY.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX287/0/...
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/M/MABANK.html
For acreage and geographic distribution, visit:
casoilresource.lawr.ucdavis.edu/see/#mabank