LOCATION WINDTHORST TX+OK

Established Series
Rev. CRC-GLL-CLN-CMR
09/2020

WINDTHORST SERIES

The Windthorst series consists of very deep, moderately well drained, moderately slowly permeable soils that formed in sandy and clayey residuum weathered from claystone and sandstone of Cretaceous age. These very gently sloping to strongly sloping soils occur on summits, shoulders, and backslopes of ridges on hills. Slope range is 1 to 12 percent. Mean annual precipitation is about 864 mm (34 in) and the mean annual temperature is about 18.3 degrees C (65 degrees F).

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

TYPICAL PEDON: Windthorst very fine sandy loam, on a south-facing, linear, 3 percent slope in wooded pasture at an elevation of 317 m (1,040 ft). (Colors are for dry soil unless otherwise stated.)

A--0 to 10 cm (0 to 4 in); grayish brown (10YR 5/2) very fine sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure parting to weak fine granular; soft, very friable; many fine and medium roots; slightly acid; clear smooth boundary. Thickness is 5 to 18 cm (2 to 7 in)

E--10 to 25 cm (4 to 10 in); light yellowish brown (10YR 6/4) very fine sandy loam, yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure; soft, very friable; many fine and medium roots; slightly acid; abrupt smooth boundary. Thickness is 0 to 30 cm (0 to 12 in)

Bt1--25 to 46 cm (10 to 18 in); red (2.5YR 4/6) clay; red (2.5YR 4/6) moist; strong fine and medium angular blocky structure; extremely hard, very firm; common fine roots; nearly continuous reddish brown (5YR 4/3) clay films on faces of most peds; moderately acid; gradual smooth boundary. Thickness is 10 to 46 cm (4 to 18 in)

Bt2--46 to 97 cm (18 to 38 in); yellowish red (5YR 5/6) sandy clay, yellowish red (5YR 4/6) moist; many medium faint strong brown (7.5YR 5/6) redoximorphic concentrations, many fine distinct brownish yellow (10YR 6/6) redoximorphic concentrations; moderate coarse angular blocky structure; extremely hard, very firm; few fine roots; common discontinuous clay films on faces of peds; moderately acid; gradual wavy boundary. Thickness is 15 to 56 cm (6 to 22 in)

Bt3--97 to 127 cm (38 to 50 in); coarsely and prominently mottled brownish yellow (10YR 6/6) and strong brown (7.5YR 5/6) sandy clay, with few medium reddish yellow (5YR 6/6) redoximorphic concentrations; moderate coarse angular blocky structure; extremely hard, very firm; few fine roots; faces of peds are coated with brown thin clay films; slightly acid; gradual wavy boundary. Thickness is 13 to 46 cm (5 to 18 in)

Cdk--127 to 152 cm (50 to 60 in); light gray (5Y 7/2) sandy clay loam; massive; hard, firm; few fine roots; common soft masses of calcium carbonate; moderately alkaline; clear wavy boundary. Thickness is 0 to 38 cm (0 to 15 in)

Cd--152 to 203 cm (60 to 80 in); very pale brown (10YR 8/3) slightly acid sand (packsand) interbedded with light gray (5Y 7/2) calcareous clay; massive; the packsand is hard dry, but is friable when moist; few fine roots.

TYPE LOCATION: Parker County, Texas; 5.2 miles southwest of the Parker County Courthouse in Weatherford, Texas, on 312 spur; 800 feet southwest of the junction with Dennis road in wooded pasture, 150 feet north of 312 spur.

USGS topographic quadrangle: Brock, Texas
Latitude: 32 degrees, 43 minutes, 45.86 seconds N
Longitude: 97 degrees, 52 minutes, 37.14 seconds W

Decimal Degrees:
Latitude: 32.7294044
Longitude: -97.8769836
Datum: WGS84

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.
Solum thickness: from 100 to about 150 cm (40 to about 60 in)
Depth to argillic horizon: 5 to 48 cm (2 to 19 in)

Particle-size control section (weighted average):
Clay content: 35 to 45 percent
Base saturation: 75 to 90 percent

A horizon:
Hue: 7.5YR to 10YR
Value: 4 to 6
Chroma: 2 to 4
Texture: fine sandy loam, very fine sandy loam, or loamy fine sand
Rock fragments: 0 to 2 percent by volume; sandstone or ironstone gravel
Reaction (pH): strongly acid to neutral (5.1 - 7.3)

E horizon:
Hue: 7.5YR to 10YR
Value: 6 to 8
Chroma: 3 to 6
Texture: fine sandy loam, very fine sandy loam, or loamy fine sand
Rock fragments: 0 to 2 percent by volume; sandstone or ironstone gravel
Reaction (pH): moderately acid to neutral (5.6 - 7.3)

Upper Bt horizons:
Hue: 2.5YR to 7.5YR
Value: 4 to 5
Chroma: 3 to 8
Texture: clay, sandy clay, or clay loam
Clay content: 35 to 50 percent
Rock fragments: 0 to 2 percent by volume; sandstone or ironstone gravel
Reaction (pH): moderately acid to neutral (5.6 - 7.3)

Lower Bt horizons:
Hue: 2.5YR to 10 YR
Value: 4 to 6
Chroma: 3 to 8
Texture: clay, clay loam, sandy clay, or sandy clay loam
Clay content: 25 to 50 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 2 percent by volume; sandstone or ironstone gravel
Reaction (pH): moderately acid to neutral (5.6 - 7.3)

BC or BCk horizon (where present):
Hue: 5YR to 2.5Y
Value: 4 to 6
Chroma: 3 to 8
Texture: clay, sandy clay, sandy clay loam, clay loam, loam or fine sandy loam;
Clay content: 20 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 2 percent by volume; sandstone or ironstone gravel;
Identifiable secondary carbonate: 0 to 2 percent
Reaction (pH): moderately acid to moderately alkaline (5.6 - 8.4)

C or Cd Horizon:
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; sandstone 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 and Truce series in the same family.
Callisburg soils: have a sola thicker than 150 cm (60 in)
Chigley soils: are gravelly and are underlain by conglomerate bedrock below a depth of 150 cm (60 in)
Cona and Shiro soils: have sola 50 to 100 cm (20 to 40 in) thick
Edge soils: have high shrink swell properties in the upper horizon and are in a moister climate
Minwells soils: are underlain by sandy or gravelly alluvium below a depth of 100 cm (40 in)
Truce soils: do not have prominent redoximorphic features in the argillic horizon

GEOGRAPHIC SETTING:
Parent material: sandy and clayey residuum weathered from sandstone, packsand and/or claystone of Lower Cretaceous age
Landscape: Hills
Landform: Summits, shoulders, and backslopes of ridges
Slope: 1 to 12 percent
Mean annual precipitation: 787 to 1016 mm (31 to 40 in)
Thornthwaite P-E Index: 49 to 65
Mean annual air temperature: 16.7 to 18.9 degrees C (62 to 66 degrees F)
Frost-free period: 197 to 263 days
Elevation: 198.1 to 463 m (650 to 1519 ft)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Chaney, Demona, Duffau, Keeter, Nimrod, and Weatherford series.
Chaney soils: have grey redoximorphic features in the upper part of the argillic horizon and occur on lower positions
Demona and Nimrod soils: have a sandy epipedon greater than 50 cm (20 in) in thickness and occur on lower positions
Duffau soils: have a fine-loamy particle-size control section and occur on similar positions
Keeter soils: have a sola less than 100 cm (40 in) in thickness and occur on higher positions
Weatherford soils: have a fine-loamy particle-size control section and occur on similar positions

DRAINAGE AND PERMEABILITY:
Drainage class: Moderately well
Permeability class: moderately slow
Runoff: medium on 1 to 5 percent slopes and high on 5 to 12 percent slopes

USE AND VEGETATION:
The major uses are livestock grazing and hay production, but some areas are cultivated; peanuts, 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 and south-central Oklahoma
Land Resource Region: J-Southwestern Prairies Cotton and Forage Region
Major Land Resource Area: 84B-West Cross Timbers
Extent: large

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Archer County, Texas; 1912. The name "Windthorst" comes from the Windthorst community in eastern Archer County, Texas.

REMARKS:
Edited 12/2016 (RFG-SCP): Converted to tabular format and added metric units. Updated competing series, geographic setting, and associated soils sections.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 25 to 76 cm (10 to 30 in) (Bt1 and Bt2)
Ochric epipedon: 0 to 25 cm (0 to 10 in) (A and E horizons)
Pale feature: Abrupt texture change at 25 cm (10 in).
Argillic horizon: 25 to 127 cm (10 to 50 in) (Bt1, Bt2, and Bt3)

ADDITIONAL DATA: Typical pedon NASIS Pedon ID S1974TX367001, KSSL Laboratory Sample Nos. 74L303-74L310.
NASIS Pedon ID S1996TX143007, KSSL Laboratory Sample Nos.96P02400-96P02409.
NASIS Pedon ID S1996TX143008, KSSL Laboratory Sample Nos.96P02410-96P02417.

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

National Cooperative Soil Survey
U.S.A.