Kirbyville soil series
Profile of Kirbyville sandy loam, 0 to 2 percent slopes. The vertical white areas are albic material (Eg horizon) that has been moved down into the profile. (Soil Survey of Tyler County, Texas by Levi Steptoe, Jr., Natural Resources Conservation Services)
The Kirbyville series consists of very deep, moderately well to somewhat poorly drained soils. These nearly level to very gently sloping soils formed in loamy fluviomarine deposits of the Lissie Formation of early to mid-Pleistocene age. Slope ranges from 0 to 2 percent. Mean annual temperature is about 19.4 degrees C (67 degrees F), and mean annual precipitation is about 1295 mm (51 in).
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, thermic Oxyaquic Paleudults
Note: Kirbyville soils have 5 percent or more plinthite in one subhorizon within 150 cm of the mineral soil surface. They would classifiy as "Oxyaquic Plinthic" if this subgroup combination was listed in the current version of Soil Taxonomy.
Soil Moisture: An udic soil moisture regime. The soil moisture control section is 10 to 30 cm (4 to 12 in) below the soil surface and remains dry less than 90 cumulative days in most years.
Mean annual soil temperature: 20.6 to 21.7 degrees C (69 to 71 degrees F)
Depth to glossic horizon: 28 to 56 cm (11 to 22 in)
Depth to episaturation: 41 to 99 cm (16 to 39 in)
Base saturation at taxonomic depth for the Ultisols order: 14 to 30 percent
Saturated from 46 to 89 cm (16 to 39 in) for 30 or more cumulative days in normal years. (Bt/E horizon)
Plinthite--5 percent or more of some part of the argillic horizon.
USE AND VEGETATION: Used mainly for timber production and wildlife habitat. Some areas have been cleared and are used for improved pasture. Native vegetation is loblolly and shortleaf pine with mixed hardwoods. The understory is dogwood, waxmyrtle, pinehill bluestem, and other grasses.
DISTRIBUTION AND EXTENT: Southeastern Texas and southwestern Louisiana; LRR T; The Western Gulf Coast Flatwoods (MLRA 152B); The series is of moderate extent.
Kirbyville soils were formerly included with the Caddo and Thage soils. Classification and drainage class changed 12/97 based on data collected from typifying pedon in Hardin County, TX. Soil moisture monitoring indicates these soils to have saturation, for several weeks during January to March, with no reduction and qualify for a Oxyaquic subgroup. Typifying pedon redescribed 12/97. The classification was updated from Plinthic Paleudults to Oxyaquic Paleudults in May 1999 due to a change in soil taxonomy.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX457/0/...
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/K/KIRBYVILLE.html
For acreage and geographic distribution, visit:
Kirbyville soil series
Profile of Kirbyville sandy loam, 0 to 2 percent slopes. The vertical white areas are albic material (Eg horizon) that has been moved down into the profile. (Soil Survey of Tyler County, Texas by Levi Steptoe, Jr., Natural Resources Conservation Services)
The Kirbyville series consists of very deep, moderately well to somewhat poorly drained soils. These nearly level to very gently sloping soils formed in loamy fluviomarine deposits of the Lissie Formation of early to mid-Pleistocene age. Slope ranges from 0 to 2 percent. Mean annual temperature is about 19.4 degrees C (67 degrees F), and mean annual precipitation is about 1295 mm (51 in).
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, thermic Oxyaquic Paleudults
Note: Kirbyville soils have 5 percent or more plinthite in one subhorizon within 150 cm of the mineral soil surface. They would classifiy as "Oxyaquic Plinthic" if this subgroup combination was listed in the current version of Soil Taxonomy.
Soil Moisture: An udic soil moisture regime. The soil moisture control section is 10 to 30 cm (4 to 12 in) below the soil surface and remains dry less than 90 cumulative days in most years.
Mean annual soil temperature: 20.6 to 21.7 degrees C (69 to 71 degrees F)
Depth to glossic horizon: 28 to 56 cm (11 to 22 in)
Depth to episaturation: 41 to 99 cm (16 to 39 in)
Base saturation at taxonomic depth for the Ultisols order: 14 to 30 percent
Saturated from 46 to 89 cm (16 to 39 in) for 30 or more cumulative days in normal years. (Bt/E horizon)
Plinthite--5 percent or more of some part of the argillic horizon.
USE AND VEGETATION: Used mainly for timber production and wildlife habitat. Some areas have been cleared and are used for improved pasture. Native vegetation is loblolly and shortleaf pine with mixed hardwoods. The understory is dogwood, waxmyrtle, pinehill bluestem, and other grasses.
DISTRIBUTION AND EXTENT: Southeastern Texas and southwestern Louisiana; LRR T; The Western Gulf Coast Flatwoods (MLRA 152B); The series is of moderate extent.
Kirbyville soils were formerly included with the Caddo and Thage soils. Classification and drainage class changed 12/97 based on data collected from typifying pedon in Hardin County, TX. Soil moisture monitoring indicates these soils to have saturation, for several weeks during January to March, with no reduction and qualify for a Oxyaquic subgroup. Typifying pedon redescribed 12/97. The classification was updated from Plinthic Paleudults to Oxyaquic Paleudults in May 1999 due to a change in soil taxonomy.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX457/0/...
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/K/KIRBYVILLE.html
For acreage and geographic distribution, visit: