LOCATION CLAIRETTE               TX

Tentative Series
Rev. LAD
09/2020

CLAIRETTE SERIES

The Clairette series consists of very deep, moderately well drained, moderately slowly permeable soils that formed in loamy and clayey slope alluvium derived from sandstone and siltstone of Cretaceous age. These very gently sloping to moderately sloping soils occur on base slopes and head slopes of ridges on hills. Slope ranges from 1 to 8 percent. Mean annual precipitation is about 800 mm (31 in) and the mean annual temperature is about 17.6 degrees C (64 degrees F).

TAXONOMIC CLASS: Fine, mixed, active, thermic Udic Paleustalfs

TYPICAL PEDON: Clairette loam, on a south-facing, linear, 5 percent slope in pasture at an elevation of 447 m (1,474 ft). (Colors are for dry soil unless otherwise stated.)

Ap--0 to 11 cm (0 to 4 in); brown (10YR 4/3), dark brown (10YR 3/3), moist; loam; 44 percent sand; 36 percent silt; 20 percent clay; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; many medium roots throughout and many fine roots throughout; few fine pores; noneffervescent, by HCL, 1N; neutral, pH 6.9; clear smooth boundary.

A--11 to 26 cm (4 to 10 in); yellowish brown (10YR 5/4), dark yellowish brown (10YR 4/4), moist; loam; 49 percent sand; 32 percent silt; 19 percent clay; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, nonplastic; many fine roots throughout; few fine pores; noneffervescent, by HCL, 1N; neutral, pH 7.3; clear smooth boundary. (Combined thickness is 5 to 35 cm [2 to 14 in].)

Bt--26 to 67 cm (10 to 26 in); reddish brown (5YR 4/4), dark reddish brown (5YR 3/4), moist; clay loam; 31 percent sand; 31 percent silt; 38 percent clay; strong medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; common fine roots throughout; few fine pores; 80 percent prominent clay films on all faces of peds; noneffervescent, by HCL, 1N; neutral, pH 7.3; clear smooth boundary. (Thickness is 24 to 80 cm [10 to 31 in].)

Btk1--67 to 142 centimeters (26 to 56 in); reddish brown (5YR 5/4), reddish brown (5YR 4/4), moist; clay loam; 40 percent sand; 27 percent silt; 33 percent clay; strong medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; common fine roots throughout; few fine pores; 80 percent prominent clay films on all faces of peds; 1 percent fine threadlike carbonate masses; 1 percent by volume nonflat subangular indurated 2-5-20 millimeter limestone; strong effervescence, by HCL, 1N; slightly alkaline, pH 7.8; clear smooth boundary.

Btk2--142 to 187 cm (56 to 74 in); strong brown (7.5YR 5/6), strong brown (7.5YR 4/6), moist; sandy clay loam; 47 percent sand; 27 percent silt; 26 percent clay; moderate medium subangular blocky structure; moderately hard, firm, moderately sticky, slightly plastic; few fine roots throughout; few fine pores; 40 percent distinct clay films on all faces of peds; 2 percent fine threadlike carbonate masses; violent effervescence, by HCL, 1N; moderately alkaline, pH 8.0; abrupt smooth boundary. (Combined thickness is 25 to 171 cm [10 to 67 in].)

CBk--187 to 212 centimeters (73.6 to 83.5 inches); very pale brown (10YR 7/4), light yellowish brown (10YR 6/4), moist; fine sandy loam; 56 percent sand; 27 percent silt; 17 percent clay; massive; few fine roots throughout; very few fine pores; 2 percent medium spherical weakly cemented carbonate concretions; violent effervescence, by HCL, 1N; moderately alkaline, pH 8.2.

TYPE LOCATION: Erath County, Texas; from the Hwy 377 and FM 219 intersection in Dublin, Texas, north 0.9 miles on FM 219 to private drive, 680 ft northeast on private drive, 1,080 ft east in pasture.

USGS topographic quadrangle: Dublin, Texas
Latitude: 32 degrees, 7 minutes, 5.36 seconds N
Longitude: 98 degrees, 20 minutes, 59.08 seconds W
Datum: WGS84

Decimal Degrees:
Latitude: 32.1181549
Longitude: -98.3497432

UTM Easting: 561341.91 m
UTM Northing: 3553717.47 m
UTM Zone: 14N

RANGE IN CHARACTERISTICS:
Soil Moisture: An ustic soil moisture regime. The soil moisture control section is dry in some or all parts for more than 90, but less than 120 days in normal years.
Thickness of the solum: 150 to more than 200 cm (60 to more than 80 in)
Depth to argillic horizon: 5 to 35 cm (2 to 14 in)
Depth to identifiable secondary carbonates: 29 to 115 cm (11 to 45 in)

Particle-size control section (weighted average):
Clay content: 35 to 45 percent
Base saturation: 75 to 100 percent

A horizons:
Hue: 7.5YR to 10YR
Value: 3 to 6
Chroma: 2 to 6
Texture: loam, very fine sandy loam, fine sandy loam, or sandy clay loam
Rock fragments: 0 to 2 percent by volume; limestone or ironstone gravel
Reaction (pH): strongly acid to neutral (5.1 - 7.3)

Bt horizons:
Hue: 2.5YR to 7.5YR
Value: 3 to 5
Chroma: 3 to 8
Texture: clay, sandy clay, or clay loam
Clay content: 32 to 50 percent
Rock fragments: 0 to 2 percent by volume; limestone or ironstone gravel
Reaction (pH): moderately acid to neutral (5.6 - 7.3)

Btk horizons:
Hue: 2.5YR to 2.5Y
Value: 4 to 8
Chroma: 2 to 6
Texture: clay, clay loam, sandy clay, loam, or sandy clay loam
Clay content: 25 to 45 percent
Redox concentrations: in shades of red, yellow, or brown
Redox depletions: in shades of gray occur below 76 cm (30 in) in some pedons
Rock fragments: 0 to 14 percent by volume; limestone or ironstone gravel
Reaction (pH): slightly to moderately alkaline (7.4 - 8.4)

CBk horizon:
Hue: 7.5YR to 2.5Y
Value: 4 to 7
Chroma: 2 to 6
Texture: clay, sandy clay, sandy clay loam, clay loam, silty clay loam, loam or fine sandy loam;
Clay content: 14 to 45 percent
Redox concentrations: in shades of red, yellow, or brown
Redox depletions: in shades of gray occur in some pedons
Rock fragments: 0 to 14 percent by volume; limestone or ironstone gravel;
Identifiable secondary carbonate: 0 to 2 percent
Reaction (pH): slightly to moderately alkaline (7.4 - 8.4)

C or Cd Horizon (Where present):
Hue: 7.5YR to 5Y
Value: 5 to 8
Chroma: 2 to 6
Texture: strata of sandstone, claystone or siltstone with texture from clay to loamy fine sand
Cementation: noncemented; this material does not exclude roots which range from few to common.
Rock fragments: 0 to 8 percent by volume; limestone or ironstone gravel;
Identifiable secondary carbonate: 0 to 10 percent
Reaction (pH): moderately acid to moderately alkaline (5.6 - 8.4)

COMPETING SERIES:
These are the Callisburg, Chigley, Cona, Edge, Minwells, Shiro, Truce, and Windthorst series in the same family and the similar Pedernales soil.
Callisburg soils: do not have secondary carbonates within 127 cm (50 in)
Chigley soils: are gravelly and are underlain by conglomerate bedrock below a depth of 150 cm (60 in)
Cona, Edge, Shiro, Truce, and Windthorst soils: have sola less than 150 cm (60 in)
Minwells soils: are underlain by sandy or gravelly alluvium below a depth of 100 cm (40 in)
Pedernales soils: have a soil moisture control section that is dry in some or all parts for more than 120 days in normal years

GEOGRAPHIC SETTING:
Parent material: loamy and clayey slope alluvium derived from sandstone and siltstone of Cretaceous age
Landscape: hills
Landform: lower side slopes, base slopes and head slopes of ridges and strath terraces
Slope: 1 to 8 percent
Mean annual precipitation: 787 to 909 mm (31 to 36 in)
Thornthwaite P-E Index: 32 to 45
Mean annual air temperature: 17.1 to 18.8 degrees C (63 to 66 degrees F)
Frost-free period: 218 to 236 days
Elevation: 198 to 463 m (650 to 1519 ft)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Windthorst, Duffau, Wise, Frio, and Purves series.
Windthorst soils: less than 150 cm (60 in) to densic bedrock and occur on crests and upper side slopes
Duffau soils: do not have secondary carbonates within 150 cm (60 in) and occur on similar positions
Wise soils: less than 100 cm (40 in) to densic bedrock and occur on upper side slopes and nose slopes
Frio soils: have a mollic epipedon and occur on floodplains
Purves soils: less than 50 cm (20 in) to limestone bedrock and occur on higher limestone ridges

DRAINAGE AND PERMEABILITY:
Drainage class: moderately well
Permeability class: moderately slow
Runoff: medium on 1 to 5 percent slopes and high on 5 to 8 percent slopes

USE AND VEGETATION:
The major uses are livestock grazing and hay production, but some areas are cultivated; sorghums and small grains are the main crops. The native plant community is post oak and blackjack oak trees with an understory of little bluestem, indiangrass, greenbrier, and annual grasses.

DISTRIBUTION AND EXTENT:
General location: north-central Texas
Land Resource Region: J-Southwestern Prairies Cotton and Forage Region
Major Land Resource Area: 84B-West Cross Timbers
Extent: moderate

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES PROPOSED: Erath County, Texas; 2020. The name "Clairette" comes from the Clairette community in southern Erath County, Texas.

REMARKS:
The series was formerly included in the Windthorst and Pedernales series. The series was separated based on soil depth and soil climate.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 26 to 76 cm (10 to 30 in) (Bt and Btk1 horizons)
Ochric epipedon: 0 to 26 cm (0 to 10 in) (A horizons)
Argillic horizon: 26 to 187 cm (10 to 74 in) (Bt, Btk1, and Btk2)
Free carbonates: 67 to 212 cm (26 to 212 in) (Btk1, Btk2, and CBk horizons)
Secondary carbonates: 67 to 212 cm (26 to 212 in) (Btk1, Btk2, and CBk horizons)

ADDITIONAL DATA: Typical pedon NASIS Pedon ID S2018TX1439021

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.