LOCATION WOODS OK+KS TX

Established Series
JGF-JWF-WJG
06/2020

WOODS SERIES

The Woods series consists of very deep, well drained, very slowly permeable soils formed in clayey alluvial sediments derived from the Laverne (Valentine) Member of the Ogallala Formation of Miocene-Pliocene age. These nearly level to moderately steep soils occur on interfluves and hillslopes. Slope ranges from 0 to 15 percent. Mean annual precipitation is about 530 mm (21 in), and mean annual air temperature is about 15 degrees C (59 degrees F).

TAXONOMIC CLASS: Fine, smectitic, thermic Typic Calciusterts

TYPICAL PEDON: Woods silty clay loam--on a 5 percent slope, in native rangeland at approximately 610 m (2,001 ft) elevation. (Colors are for dry soil unless otherwise stated.)

Ak--0 to 25 cm (0 to 10 in); dark grayish brown (10YR 4/2) silty clay loam, very dark grayish brown (10YR 3/2), moist; moderate fine subangular blocky structure parting to moderate fine granular; very hard, firm; many fine roots; few fine concretions of calcium carbonate; slightly effervescent; moderately alkaline; clear smooth boundary. Thickness is 23 to 33 cm (9 to 13 in)

Btkss--25 to 66 cm (10 to 26 in); brown (10YR 5/3) silty clay, brown (10YR 4/3), moist; strong medium prismatic structure parting to strong medium angular blocky; extremely hard, very firm; few fine and common very fine roots; common distinct pressure faces; common distinct slickensides oriented approximately 45 degrees from horizontal; prominent clay films on faces of peds; cracks filled with very dark grayish brown (10YR 3/2) moist, silty clay loam; few fine threadlike masses and few fine concretions of calcium carbonate; strongly effervescent; moderately alkaline; clear smooth boundary. Thickness is 25 to 66 cm (10 to 26 in)

Bk--66 to 76 cm (26 to 30 in); light brown (7.5YR 6/4) clay loam, brown (7.5YR 5/4), moist; weak coarse prismatic structure parting to weak medium subangular blocky; very hard, very firm; few fine and few very fine roots; common distinct carbonate coats on ped faces; many medium irregular masses of calcium carbonate; violently effervescent; moderately alkaline; clear smooth boundary. Thickness is 0 to 46 cm (0 to 18 in)

Cky--76 to 203 cm (30 to 80 in); pink (7.5YR 7/4) stratified laminae of silt loam, clay loam, and silty clay; light brown (7.5YR 6/4), moist; massive; hard, firm; common carbonate coats on ped faces; common fine and few medium irregular masses of calcium carbonate; a 2 inch strata contains many fine gypsum crystals and is noncalcareous; violently effervescent; moderately alkaline.

TYPE LOCATION: Woods County, Oklahoma; from the intersection of State Highway 50 and State Highway 64 at Camp Houston, OK; 9 miles north on county road NS2190, then approximately 1 mile west on Major Road, then approximately 1 mile south-southwest on private road; 1550 ft (472 m) west and 2600 ft (793 m) south of the northeast corner of Section 4, Township 28N, Range 18W (Indian Meridian).
USGS topographic quadrangle: Freedom NW; Oklahoma
Latitude: 36 degrees, 56 minutes, 11.00 seconds N
Longitude: 99 degrees, 8 minutes, 16.00 seconds W

Decimal Degrees
Latitude: 36.9363899
Longitude: -99.1377792
Datum: WGS84

UTM Northing: 4087825 m
UTM Easting: 487731 m
UTM zone: 14S

RANGE IN CHARACTERISTICS:
Soil moisture: A Typic Ustic moisture regime. The soil moisture control section is dry in some part or all parts for more than 180 but less than 225 cumulative days in normal years. The soil is intermittently moist in some part from December to March; intermittently moist from July to September; and typically the driest in January to February.

Solum thickness: 50 to 100 cm (20 to 40 in)
Thickness of mollic epipedon: 23 to 33 cm (9 to 13 in)
Depth to slickensides: 15 to 43 cm (6 to 17 in)
Thickness of slickensides: 25 to 66 cm (10 to 26 in)
Depth to secondary carbonates: 18 to 38 cm (7 to 15 in)
Depth to calcic horizon: 40 to 76 cm (16 to 30 in)
Vertic Features: when dry, seasonal cracks 0.5 to 5 cm (0.2 to 2 in) wide extend through one or more horizons from the soil surface to a depth of 50 cm (20 in) or more.
Particle size control section (weighted averages):
Total clay content: 35 to 60 percent
Silicate clay content: 35 to 60 percent
Clay-sized carbonate content: 1 to 5 percent
Total sand content: 2 to 45 percent
Rock fragments: none

A and Ak horizons:
Hue: 7.5YR to 10YR
Value: 3 to 5, 2 to 3 moist
Chroma: 1 to 3 moist or dry
Texture: clay loam, silty clay loam
Total clay content: 30 to 40 percent
Clay-sized carbonate: 0 to 3 percent
Total sand content: 5 to 45
Rock Fragments: none
Calcium carbonate equivalent: 0 to 5 percent
Identifiable secondary carbonate: 0 to 1 percent; fine to medium; masses,
nodules, and concretions
Effervescence: none to slight
Soil Reaction (pH): neutral to moderately alkaline (6.6-8.4)

Btss and Btkss horizons:
Hue: 7.5YR to 10YR
Value: 4 to 6, 3 to 5 moist
Chroma: 3 to 6 moist or dry
Texture: clay loam, silty clay loam, silty clay, clay
Total clay content: 35 to 60 percent
Total sand content: 2 to 45
Rock fragments: none
Clay-sized carbonate content: 1 to 5 percent
Slickensides/Pressure faces: common to many; distinct or prominent, oriented
35 to 60 degrees from horizontal
Calcium carbonate equivalent: 2 to 18 percent
Identifiable secondary carbonate: 0 to 5 percent; fine to medium; masses,
nodules, and concretions
Effervescence: slight to violent
Soil Reaction (pH): neutral to moderately alkaline (6.6-8.4)

Bk horizons:
Hue: 7.5YR to 10YR
Value: 5 to 6, 4 to 5 moist
Chroma: 3 to 6 dry or moist
Texture: clay loam, silty clay loam, silty clay, and clay
Total clay content: 27 to 60 percent
Clay-sized carbonate content: 1 to 10 percent
Total sand content: 2 to 45 percent
Rock fragments: none
Calcium carbonate equivalent: 15 to 40 percent
Identifiable secondary carbonate: 5 to 30 percent; fine to coarse; films,
masses, nodules, and concretions
Effervescence: strong to violent
Soil Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

Ck or Cky horizon:
Hue: 7.5YR to 2.5Y
Value: 5 to 7, 4 to 6 moist
Chroma: 3 to 6 dry or moist
Texture: loam, silt loam, clay loam, silty clay loam, silty clay, and clay; this layer is usually stratified and may contain some thin strata of sand to sandy loam
Total clay content: 18 to 60 percent
Clay-sized carbonate content: 1 to 10 percent
Total sand content: 2 to 45 percent
Rock fragments: none
Calcium carbonate equivalent: 5 to 20 percent
Identifiable secondary carbonate: 1 to 10 percent; fine to coarse; films,
masses, nodules, and concretions; these are commonly inherited from the
geologic deposit (Ogallala formation)
Gypsum: 0 to 25 percent; crystals; located in thin strata
Effervescence: strong to violent
Soil Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

COMPETING SERIES:
There are no competing series. Similar soils are the Chapel, Dreyer, Frelsburg, and Latium series.
Chapel soils: formed in clayey lacustrine playa deposits and have a wetter soil moisture regime
Dreyer and Leakey soils: formed in clays and marls and have a wetter soil moisture regime
Frelsburg soils: formed in share residuum and have a wetter soil moisture regime

GEOGRAPHIC SETTING:
Parent material: calcareous clayey alluvium derived from the Laverne
(Valentine) Member of the Ogallala Formation of Miocene-Pliocene age
Landscape: dissected high plains
Landform: interfluves and hillslopes
Slope: 0 to 15 percent
Mean annual precipitation: 457 to 660 mm (18 to 26 in)
Thornthwaite annual P-E Index: 30 to 36
Mean annual air temperature: 13.6 to 16.7 degrees C (56 to 62 degrees F)
Frost-free period: 180 to 215 days
Elevation: 609.6 to 914.4 m (2,000 to 3,000 ft)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Abbie, Case, Farry, Fortyone, Irene, Mansic, and Oklark
series.
Abbie soils: occur on adjacent terraces and terrace remnants, have a fine-loamy particle-size class, do not have a calcic horizon within 100 cm (40 in) of the soil surface
Case and Mansic soils: occur on similar positions, and have a fine-loamy particle-size class
Farry soils: occur on adjacent lower positions and have a fine-loamy particle-size class
Fortyone soils: occur on adjacent lower positions and have a coarse-loamy particle-size class
Irene soils: occur on adjacent terraces and terrace remnants, have a fine-silty particle-size class, do not have a calcic horizon within 100 cm (40 in) of the soil surface
Oklark soils: occur on similar positions, and have a coarse-loamy particle-size class

DRAINAGE AND PERMEABILITY:
Drainage class: well drained
Permeability: very slow
Runoff: high on 0 to 1 percent slopes and very high on slopes greater than 1
percent

USE AND VEGETATION:
Major use: livestock grazing
Native vegetation: buffalograss, bluegrama, and sideoats grama
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: Clay loam 16-24" PZ (R077EY051TX)

DISTRIBUTION AND EXTENT:
General Area: Northwestern Oklahoma, southwestern Kansas, and the Texas and Oklahoma Panhandles
Land Resource Region: H - Central Great Plains Winter Wheat and Range Region
Major Land Resource Area 77E - Southern High Plains, Breaks
Extent: Minor

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

SERIES ESTABLISHED: Woods County, Oklahoma, 1995. The name is taken from the
county where the series was established.

REMARKS:

User Pedon ID: P1980OK151089 (TL)

Diagnostic horizons and features recognized in this pedon:
Mollic epipedon: 0 to 25 cm (0 to 10 in) (Ak horizon)
Argillic horizon: 25 to 66 cm (10 to 26 in) (Btkss horizon)
Slickensides: 25 to 66 cm (10 to 26 in) (Btkss horizon)
Identifiable secondary carbonates: 0 to 203 cm (10 to 80 in) (Ak, Btkss, Bk, and Cky horizons)
Calcic horizon: 66 to 203 cm (26 to 80 in) (Bk and Cky horizons)

ADDITIONAL DATA: none available.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014.

National Cooperative Soil Survey
U.S.A.