LOCATION WOODWARD OK+KS+TX

Established Series
Rev. EGF-ELC-JWF-CLN-JGF-RFG
01/2019

WOODWARD SERIES

The Woodward series consists of moderately deep, well drained, moderately permeable soils that formed in residuum weathered from sandstone bedrock of Permian age. These soils occur on very gently sloping to steep interfluves and side slopes of hillslopes, ridges and escarpments in the Central Rolling Red Plains. Slope ranges from 1 to 40 percent. Mean annual precipitation is about 635 mm (25 in) and mean annual air temperature is about 16 degrees C (61 degrees F).

TAXONOMIC CLASS: Coarse-silty, mixed, superactive, thermic Typic Haplustepts

TYPICAL PEDON: Woodward loam, cultivated, on a 1 percent slope, at an elevation of 623 m, (2044 ft).
(Colors are for dry soil unless otherwise stated.)

Ap--0 to 25 cm (0 to 10 in); reddish brown (5YR 4/4) loam, dark reddish brown (5YR 3/4) moist; moderate medium granular structure; slightly hard, friable; many fine and medium roots; common wormcasts; slightly effervescent; moderately alkaline; gradual smooth boundary. Thickness is 13 to 36 cm (5 to 14 in)

Bw--25 to 51 cm (10 to 20 in); reddish brown (5YR 5/4) loam, reddish brown (5YR 4/4) moist; moderate medium granular structure; slightly hard, friable; many fine and medium roots; common wormcasts; slightly effervescent; moderately alkaline; gradual smooth boundary. Thickness is 18 to 76 cm (7 to 30 in)

BCk--51 to 71 cm (20 to 28 in); reddish brown (5YR 5/4) loam, reddish brown (5YR 4/4) moist; weak medium granular structure; slightly hard, friable; many fine roots; a few fragments of weathered sandstone in the lower part; few films of calcium carbonate; strongly effervescent; moderately alkaline; gradual wavy boundary. Thickness is 5 to 25 cm (2 to 10 in)

Cd--71 to 152 cm (28 to 60 in); red (2.5YR 4/6) noncemented, slightly effervescent, moderately alkaline; sandstone bedrock; dark red (2.5YR 3/6) moist; cracks that roots can enter are more than 10 cm across.

TYPE LOCATION:
Woodward County, Oklahoma; about 1/4 mile south of Ft. Supply; about 2,250 feet west and 450 feet north of the southeast corner of sec. 8, T. 24 N., R. 22 W.

USGS topographic quadrangle: Fort Supply, OK
Latitude: 36 degrees, 33 minutes, 56.85 seconds N
Longitude: 99 degrees, 34 minutes, 34.9 seconds W
Datum: NAD83

Decimal Degrees:
Std Latitude: 36.5657912
Std Longitude: -99.5763611

UTM Easting: 448427 m
UTM Northing: 4046861 m
UTM Zone: 14N

RANGE IN CHARACTERISTICS:
Soil Moisture: Typic ustic soil moisture regime.
Depth to densic bedrock: 50 to 102 cm (20 to 40 in)
Depth to identifiable secondary carbonates: 0 to 91 cm (0 to 36 in)
Thickness of the cambic horizon: 23 to 89 cm (9 to 35 in)

Particle-size control section (weighted average):
Total clay content: 8 to 18 percent
Carbonate clay content: 0 to 3 percent
Sand content: less than 15 percent fine sand or coarser

A horizon:
Hue: 2.5YR to 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 3 to 6
Other color features: moist value and chroma less than 3.5 are less than 18 cm (7 in) thick or have less than 0.6 percent organic carbon.
Texture: very fine sandy loam, loam, silt loam
Total clay content: 8 to 18 percent
Identifiable secondary carbonate: 0 to 5 percent; threads, masses, and nodules
Calcium carbonate equivalent: 0 to 10 percent
Effervescence: none to violent
Reaction (pH): neutral to moderately alkaline (6.6-8.4)

Bw or Bk horizon:
Hue: 2.5YR to 7.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 4 to 8
Texture: very fine sandy loam, loam, silt loam
Total clay content: 8 to 18 percent
Identifiable secondary carbonate: 0 to 10 percent; threads, masses, and nodules
Gypsum: 0 to 3 percent
Calcium carbonate equivalent: 2 to 10 percent
Effervescence: slight to violent
Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

BCk or BC horizon:
Hue: 2.5YR to 7.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 4 to 8
Texture: very fine sandy loam, loam, silt loam
Total clay content: 8 to 18 percent
Pararock fragments: 0 to 10 percent; 2 to 20 mm; extremely weakly to moderately cemented sandstone fragments
Identifiable secondary carbonate: 5 to 15 percent; threads, masses, and nodules
Gypsum: 0 to 3 percent
Calcium carbonate equivalent: 2 to 15 percent
Effervescence: slight to violent
Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

Cd horizon:
Hue: 2.5YR or 5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 6 to 8
Texture: Permian age sandstone or siltstone that breaks down to very fine sandy loam, loam, or silt loam; bulk density is high enough to be root restrictive
Total clay content: 5 to 25 percent
Cementation: Noncemented, most of this material slakes in water within 1 hour
Fractures: cracks and fractures that that roots can enter are greater than 10 cm (4 in) apart
Other features: Some pedons contain thin seams of gypsum or sandstone that are cemented
Pararock fragments: 0 to 10 percent; 2 to 75 mm; extremely weakly to moderately cemented sandstone fragments
Identifiable secondary carbonate: 0 to 15 percent; threads, masses, and nodules; in cracks or fractures
Calcium carbonate equivalent: 0 to 15 percent
Effervescence: none to violent
Reaction (pH): moderately alkaline to strongly alkaline (7.9-9.0)

COMPETING SERIES:
These are the Deepwood, Enterprise, and Gotebo series in the same family. Similar soils are the Dill and Shrewder series.
Deepwood and Shrewder soils: do not have bedrock within a depth of 102 cm.
Dill soils: have a coarse-loamy particle-size class and formed from weakly cemented sandstone of the Elk City Formation of Permian age
Enterprise soils: do not have bedrock within a depth of 102 cm and formed from eolian material along major streams.
Gotebo soils: have hues of 7.5YR or yellower throughout the B and C horizons.

GEOGRAPHIC SETTING:
Parent material: loamy residuum weathered from noncemented, calcareous, fine-grained sandstone and/or siltstone; mainly occurs in the Marlow and Rush Springs formations (Whitehorse Group), Cloud Chief, and Quartermaster formations of Permian age.
Landscape: Dissected Plains
Landform: summits, shoulders, and backslopes of interfluves and side slopes of hillslopes, hills, ridges, and escarpments
Slopes: 1 to 40 percent
Mean annual precipitation: 508 to 762 mm (20 to 30 in)
Thornthwaite annual P-E Index Values: 32 to 44
Mean annual air temperature: 13.9 to 17.8 degrees C (57 to 64 degrees F)
Frost-free period: 180 to 230 days
Elevation: 396.2 to 792.5 m (1,300 to 2,600 ft)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Aspermont, Carey, Deepwood, Enterprise, Obaro, Paducah, Quinlan, Selman, and Shrewder series.
Aspermont and Obaro soils: occur on similar positions and have a fine-silty particle-size class
Carey, Paducah, and Selman soils: occur on nearby slopes, have an argillic horizon, and a fine-silty particle-size class
Deepwood, Enterprise, and Shrewder soils: occur on similar to lower positions
Quinlan soils: occur on similar positions and are less than 50 cm (20 in) to sandstone bedrock

DRAINAGE AND PERMEABILITY:
Drainage class: well drained
Permeability class: moderate
Runoff class: low on 1 to 5 percent slopes, medium on 5 to 20 percent slopes, and high on slopes greater than 20 percent.

USE AND VEGETATION:
Major uses: mostly livestock grazing but a considerable acreage on lesser slopes is used for crop production
Native vegetation: mainly little bluestem and grama grasses
Ecological sites assigned to phases and components of this series are listed below. Current ecological site assignments are in Web Soil Survey. Components of this series include the following ecological sites: Loamy Upland, Loamy Breaks

DISTRIBUTION AND EXTENT:
General area: Western Oklahoma, a few counties in southern Kansas, and northwestern Texas
Land Resource Region: H - Central Great Plains Winter Wheat and Range Region
MLRA 78B & 78C - Central Rolling Red Plains, Western and Eastern Parts
Extent: Large

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

SERIES ESTABLISHED: Woodward County, Oklahoma; 1944.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: 0 to 25 cm (0 to 10 in) (A horizon)
Cambic horizon: 25 to 71 cm (10 to 28 in) (B horizons)
Identifiable secondary carbonate: 51 to 71 cm (20 to 28 in) (BCk horizon)
Densic contact: at 71 cm (28 in), the top of the Cd layer
Densic material: 71 to 152 cm (28 to 60 in), the Cd layer

ADDITIONAL DATA: Oklahoma State University Lab - Sample 75-OK-75-1-(1-4). KSSL Lab samples S80-TX263-001, S1987OK059002C, S1987OK153001, S1988OK003002, S1988OK003003, S1988OK151001

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

National Cooperative Soil Survey
U.S.A.