LOCATION ASPERMONT TX+OK+KSEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Typic Calciustepts
TYPICAL PEDON: Aspermont clay loam--on 1 percent slope in rangeland. (Colors are for dry soil unless otherwise stated.)
A--0 to 6 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; moderate fine and medium subangular blocky structure; hard, very friable; common fine and medium roots; common very fine and fine pores and few medium pores; strongly effervescent; moderately alkaline; clear smooth boundary. (4 to 15 inches thick)
Bw--6 to 15 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; weak coarse prismatic structure parting to moderate fine and medium subangular blocky; hard, friable; common fine and few medium roots; common very fine and fine pores; strongly effervescent; moderately alkaline; clear smooth boundary. (6 to 22 inches thick)
Bk1--15 to 21 inches; yellowish red (5YR 4/6) silty clay loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; very hard, firm; common fine and few coarse roots; few very fine and fine pores; common fine concretions, few fine masses, and few threads of calcium carbonate; violently effervescent; moderately alkaline; clear smooth boundary.
Bk2--21 to 33 inches; yellowish red (5YR 5/6) silty clay loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; very hard, firm; common fine and few coarse roots; few very fine and fine pores; common fine and medium concretions and many medium and coarse masses of calcium carbonate; violently effervescent; moderately alkaline; gradual smooth boundary.
Bk3--33 to 42 inches; yellowish red (5YR 5/6) silty clay loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; very hard, firm; common fine and few coarse roots; common very fine and fine pores; few fine and medium concretions and common medium and coarse masses of calcium carbonate; violently effervescent; moderately alkaline; gradual smooth boundary. (Combined thickness of the Bk horizons is 8 to 30 inches)
BCk--42 to 58 inches; reddish brown (2.5YR 5/4) clay loam, reddish brown (2.5YR 4/4) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; extremely hard, very firm; few fine and few coarse roots; few very fine and fine pores; very few iron-manganese stains on vertical and horizontal faces of peds; common medium and coarse masses of calcium carbonate; strongly effervescent; 1 percent claystone paragravel; moderately alkaline; clear smooth boundary. (0 to 20 inches thick)
2Cd1--58 to 66 inches; reddish brown (2.5YR 4/4) silty clay; massive; extremely hard, very firm; few fine roots in cracks; very few iron-manganese stains; slightly effervescent; 20 percent claystone paragravel; moderately alkaline; clear wavy boundary.
2Cd2--66 to 80 inches; 90 percent dark red (2.5YR 3/6) and 5 percent greenish gray (5GY 6/1) and 5 percent greenish gray (5G 5/1) interbedded claystone and siltstone bedrock; slightly effervescent; slightly alkaline.
TYPE LOCATION: Stonewall County, TX; from the junction of U.S. Highway 83 and Farm Road 2211 in Aspermont; 1.9 miles south on U.S. Highway 83; 300 feet west in rangeland; (Latitude: 33 degrees, 6 minutes, 23.55 seconds N; Longitude: 100 degrees, 13 minutes, 25.93 seconds W) Aspermont Lake USGS topographic quadrangle; NAD 1929.
RANGE IN CHARACTERISTICS:
Thickness of the solum, 40 to 60 inches
Depth to densic or paralithic materials: 40 to 60 inches
Depth to calcic horizon: 12 to 32 inches
Particle-size control section (weighted average)
Clay content: dominantly 25 to 33 percent, but ranges from 18 to 35 percent
Fine sand or coarser content: 0 to 15 percent
Coarse Fragments: 0 to 10 percent
CEC/clay ratio: 0.40 to 0.60
A Horizon
Hue: 2.5YR to 7.5YR
Value: 4 to 6
Chroma: 3 to 6
Texture: loam, silt loam, clay loam, or silty clay loam
Clay content: 18 to 35 percent
Permeability: 0.2 to 2.0 in/hr
Calcium carbonate equivalent: 2 to 10 percent
EC (dS/m): 0 to 2
Gypsum: 0 to 1 percent
SAR: 0 to 2
Effervescence: very slight to strong
Reaction: 7.9 to 8.4 - moderately alkaline
Bw Horizon (where present)
Hue: 2.5YR to 7.5YR
Value: 4 to 6
Chroma: 3 to 6
Texture: loam, silt loam, clay loam, or silty clay loam
Clay content: 18 to 35 percent
Permeability: 0.2 to 2.0 in/hr
Calcium carbonate equivalent: 5 to 15 percent
EC (dS/m): 0 to 2
Gypsum: 0 to 1 percent
SAR: 0 to 2
Effervescence: slight or strong
Reaction: 7.9 to 8.4 - moderately alkaline
Bk Horizon
Hue: 2.5YR or 5YR
Value: 4 to 6
Chroma: 4 to 6
Texture: loam, silt loam, clay loam, or silty clay loam
Clay content: 18 to 35 percent
Permeability: 0.6 to 2.0 in/hr
Calcium carbonate equivalent: 10 to 40 percent
Identifiable secondary carbonate: few to many, fine to coarse, concretions, masses, and threads
EC (dS/m): 0 to 2
Gypsum: 0 to 2 percent
SAR: 0 to 4
Effervescence: strong or violent
Reaction: 7.9 to 8.4 - moderately alkaline
BCk or 2BCk Horizon
Hue: 2.5YR or 5YR
Value: 4 to 6
Chroma: 4 to 6
Texture: loam, silt loam, clay loam, silty clay loam, silty clay or clay
Clay content: 18 to 40 percent
Permeability: 0.6 to 1.0 in/hr
Pararock fragments: 0 to 10 percent
Calcium carbonate equivalent: 5 to 25 percent
Identifiable secondary carbonate: few to many, fine to coarse, concretions, masses, and threads
EC (dS/m): 0 to 4
Gypsum: 0 to 5 percent
SAR: 0 to 6
Effervescence: strong or violent
Reaction: 7.9 to 8.4 - moderately alkaline
2Cd Horizon
Hue: 2.5YR or 5YR
Value: 4 to 6
Chroma: 4 to 6
Texture: clay loam, silty clay loam, silty clay, clay, or interbedded siltstone and claystone; some pedons contain thin layers of fractured dolomite or limestone
Clay content: 27 to 60 percent
Permeability: 0.0015 to 0.02 in/hr
Moist bulk density: 1.7 to 2.0
Effervescence: very slight to strong
Reaction: 7.4 to 8.4 - slightly alkaline or moderately alkaline
This horizon is root restrictive with bulk density high enough that roots may enter only in cracks or fractures and qualifies as densic material.
COMPETING SERIES: There are no series in the same family. Similar soils are the
Burford,
Jaywi,
Obaro,
Quanah, and
Weymouth series.
Burford soils: do not have a calcic horizon
Jaywi soils: have sola thicker than 60 inches
Obaro soils: have weakly cemented sandstone within 40 inches
Quanah soils: have a mollic epipedon and have sola more than 60 inches to redbed siltstone or claystone
Weymouth soils: has a fine-loamy particle-size control section
GEOGRAPHIC SETTING:
Parent material: calcareous silty colluvium over siltstone and claystone redbed sediments of the Blaine formation of Permian age
Landform: summits and side slopes on upland hills
Slope: 1 to 25 percent
Mean annual air temperature range: 59 to 64 degrees F.
Mean annual precipitation range: 20 to 26 inches
Frost-free period: 190 to 230 days
Elevation: 1400 to 2000 feet
Thornthwaite annual P-E indices: 31 to 40
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Cottonwood,
La Casa,
Quanah,
Talpa,
Vernon, and
Westill series.
Cottonwood and Talpa soils: occur on higher positions and are less than 20 inches to gypsum and limestone respectively
La Casa and Westill soils: occur on lower positions, have a mollic epipedon, and are fine in the particle-size control section
Quanah soils: occur on lower positions
Vernon soils: occur on similar positions, are less than 40 inches to redbed claystone sediments, and are fine in the particle-size control section
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderately slow or moderate. Runoff is medium on 1 to 5 percent slopes, high on 5 to 20 percent slopes, and very high on slopes of more than 20 percent.
USE AND VEGETATION: Used mainly for rangeland. Some areas are used for cropland with mainly cotton and wheat grown. Native vegetation is a mixed grass prairie with sideoats grama and little bluestem being the dominant species.
DISTRIBUTION AND EXTENT: Central Rolling Red Plains of north Texas and western Oklahoma; LRR H; MLRA 78B; large extent.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Stonewall County, Texas; 1970.
REMARKS: Type location in Stonewall County, Texas was sampled for complete characterization and redescribed in 1998.
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 10 to 40 inches. (Bw and Bk horizons)
Ochric epipedon: 0 to 6 inches (A horizon).
Cambic horizon: 6 to 15 inches (Bw horizon).
Calcic horizon: 15 to 58 inches (Bk and BCk horizons).
Densic and paralithic material: weathered siltstone and claystone at 58 inches (2Cd and 2Cr horizons).
Lithologic discontinuity: At the upper boundary of the 2BCk horizon.
Cation-exchange activity class is supported by laboratory data S98TX-433-001 from Stonewall County, TX.
Range Site: Loamy - 078BY079TX
Soil Interpretation Record Number: TX0339
ADDITIONAL DATA: NSSL data; S98TX-433-001 Stonewall Co. TX; S97OK-065-004 Jackson Co. OK.
TAXONOMIC VERSION: Soil Taxonomy, Second Edition, 1999.