LOCATION HANSFORD TX+OK

Established Series
Rev. TCB-WMR-JTM
06/2020

HANSFORD SERIES

The Hansford series consists of very deep, poorly drained, very slowly permeable soils that formed in clayey lacustrine sediments of Pleistocene age. These nearly level soils are on playa floors. Slope range is 0 to 1 percent. Mean annual precipitation is about 460 mm (18 in), and mean annual air temperature is about 13 degrees C (55 degrees F)

TAXONOMIC CLASS: Fine, mixed, superactive, mesic Ustic Epiaquerts

TYPICAL PEDON: Hansford clay--on a 0.3 percent concave slope, in pastureland (cropland returned to improved pasture) at approximately 970 m (3182 ft) elevation. (Colors are for moist soil unless otherwise noted.)

Ap--0 to 18 cm (0 to 7 in); very dark gray (10YR 3/1) clay, dark gray (10YR 4/1) dry; moderate medium and fine subangular blocky parting to weak fine granular structure; very hard, extremely firm; common very fine and fine roots; few fine irregular masses of oxidized iron on faces of peds, common fine spherical strongly cemented black (10YR 2/1) iron-manganese concretions in matrix; noneffervescent; neutral; gradual smooth boundary. Thickness of A or Ap horizon is 5 to 25 cm thick (2 to 10 in).

Bssg1--18 to 71 cm (7 to 28 in); dark gray (10YR 4/1) clay, gray (10YR 5/1) dry; moderate coarse wedge parting to moderate medium angular blocky structure; very hard, extremely firm; common very fine and fine roots throughout; few distinct slickensides; few ferriargillans on faces of peds; few fine irregular iron depletions and common fine irregular masses of oxidized iron on faces of peds, few fine irregular weakly cemented black (10YR 2/1) iron-manganese nodules and few fine spherical strongly cemented black (10YR 2/1) iron-manganese concretions in matrix; noneffervescent; neutral; gradual wavy boundary.

Bssg2--71 to 117 cm (28 to 46 in); dark gray (10YR 4/1) clay, gray (10YR 5/1) dry; moderate coarse wedge parting to moderate medium angular blocky structure; very hard, extremely firm; common very fine roots throughout; common distinct slickensides; common ferriargillans on faces of peds; common fine spherical weakly to strongly cemented iron-manganese concretions in matrix; noneffervescent; neutral; gradual wavy boundary. Combined thickness of the Bssg horizons is 0 to 198 cm (0 to 78 in)

Bkssg--117 to 147 cm (46 to 58 in); dark grayish brown (10YR 4/2) clay, grayish brown (10YR 5/2) dry; moderate coarse wedge parting to moderate medium angular blocky structure; very hard, extremely firm; common very fine roots throughout; few distinct slickensides; few ferriargillans on faces of peds; few fine irregular masses of oxidized iron on faces of peds; common fine irregular carbonate masses in matrix; noneffervescent; slightly alkaline; gradual wavy boundary. Thickness of the Bkss horizons is 0 to 178 cm (0 to 70 in)

Btkg--147 to 185 cm (58 to 73 in); dark grayish brown (10YR 4/2) clay, grayish brown (10YR 5/2), dry; moderate medium and fine subangular blocky structure; hard, firm; common very fine roots throughout; common distinct clay films on all faces of peds; few fine distinct irregular masses of oxidized iron on faces of peds; common fine distinct threadlike carbonate masses in matrix; noneffervescent; slightly alkaline; gradual smooth boundary. Thickness of Btkg horizons is 0 to 110 cm (24 to 43 in)

Btk--185 to 203 cm (73 to 80 in); brown (10YR 5/3) clay, pale brown (10YR 6/3), dry; moderate medium and fine subangular blocky structure; hard, firm; common distinct clay films on all faces of peds; few fine distinct irregular masses of oxidized iron on faces of peds; common fine distinct threadlike carbonate masses in matrix; noneffervescent; slightly alkaline.

TYPE LOCATION: Hansford County, Texas; from the intersection of State Highway 207 and State Highway 51 south of Spearman; 0.7 mile east on State Highway 51, then 0.4 mile south on Farm Road 20 and 915 ft (279 m) east into playa basin.

USGS topographic quadrangle: Morse SE, Texas
Latitude: 36 degrees, 04 minutes, 30.4 seconds N
Longitude: 101 degrees, 16 minutes, 01.4 seconds W
Datum: WGS84

Decimal Degrees
Latitude: 36.0751114
Longitude: -101.2670593

UTM Northing: 3994658
UTM Easting: 295853
UTM Zone 14S
RANGE IN CHARACTERISTICS:
Soil moisture: An aquic moisture regime. These soils receive runoff from surrounding uplands and are moist for longer periods than normal for the climate. The soil cracks and is dry in parts of the upper 50 cm (20 in) for more than 90 cumulative days in normal years. July through August and November through March are the driest months. These soils are intermittently moist in September through October and April through June.
Solum thickness: more than 203 cm (80 in)
Depth to slickensides: 5 to 50 cm (2 to 20 in)
Depth to episaturation: 0 to 25 cm (0 to 10 in) from May through August
Depth to secondary carbonates (where present): more than 25 cm (10 in)
Depth to Redoximorphic features: 0 to 50 cm (0 to 20 in)
Vertic features: 0 to 203 cm (0 to 80 in); when dry, seasonal cracks 0.5 to 5 cm (0.2 to 2 in) wide extend through one or more horizons to a depth of 100 cm (39 in) or more. Also, a layer greater than 15 cm (6 in) thick with wedge-shaped peds and/or slickensides. Gilgai micro-relief is commonly observed in undisturbed areas. Linear Extensibility averages from 12 to 16 cm (5 to 6 in) in the upper 100 cm (40 in)

Particle-size control section (weighted average):
Total clay content: 40 to 60 percent
Silicate clay content: 40 to 60 percent
Clay-sized carbonate content: 0 to 3 percent
Total sand content: 5 to 25 percent
Rock fragments: none

A and Ap horizon:
Hue: 10YR
Value: 2 to 4, 3 to 5 dry
Chroma: 1 or 2 moist or dry
Texture: clay, clay loam, silty clay, or silty clay loam
Total clay content: 35 to 60 percent
Silicate clay content: 35 to 60 percent
Clay-sized carbonate content: none
Total sand content: 5 to 25 percent
Rock fragments: none
Redoximorphic features: few to common iron-manganese masses, concretions, and iron or clay depletions
Effervescence: none to slight
Reaction (pH): slightly acid to neutral (6.1 to 7.3)

Bssg horizons:
Hue: 10YR or 2.5Y
Value: 3 to 5, 4 to 6 dry
Chroma: 2 or less moist or dry
Texture: clay or silty clay
Total clay content: 40 to 60 percent
Silicate clay content: 40 to 60 percent
Clay-sized carbonate content: none
Total sand content: 5 to 25 percent
Rock fragments: none
Redoximorphic features: few to common iron-manganese masses, concretions, iron stains, reduced matrix, and iron or clay depletions
Effervescence: none to slight
Reaction (pH): neutral or slightly alkaline (6.6-7.8)

Bkssg horizons:
Hue: 10YR or 2.5Y
Value: 3 to 5, 4 to 6 dry
Chroma: 2 or less moist or dry
Texture: clay, clay loam, silty clay, or silty clay loam
Total clay content: 35 to 60 percent
Silicate clay content: 35 to 60 percent
Clay-sized carbonate content: 0 to 3 percent
Total sand content: 5 to 25 percent
Rock fragments: none
Redoximorphic features: few to common iron-manganese masses, concretions, iron stains, reduced matrix, and iron or clay depletion
Calcium carbonate equivalent: 0 to 5 percent
Identifiable secondary carbonate: 1 to 5 percent; concentrations and masses
Effervescence: none to violent
Reaction (pH): neutral to moderately alkaline (6.6-8.4)

Bk, Bkg, Btk and Btkg horizon (where present):
Hue: 10YR or 7.5Y
Value: 3 to 5, 4 to 6 dry
Chroma: 1 to 6 moist or dry
Texture: clay, clay loam, silty clay, or silty clay loam
Total clay content: 30 to 60 percent
Silicate clay content: 30 to 60 percent
Clay-sized carbonate content: 0 to 5 percent
Total sand content: 5 to 35 percent
Rock fragments: none
Redoximorphic features: none to common iron-manganese concretions
Calcium carbonate equivalent:0 to 5 percent
Visible secondary calcium carbonate: amount- 1 to 10 percent; kind-concretions and masses
Effervescence: none to violent
Reaction (pH): slightly alkaline or moderately alkaline (7.4-8.4)

COMPETING SERIES:
There are no competing series. Similar soils include the Knoblaw, Lautz, and Ness series.
Knoblaw series: have a calcic horizon within 100 and 150 cm (40 to 60 in) of the soil surface, are dry in the soil moisture control section for longer periods; and do not have aquic soil moisture regime.
Lautz series: are dry in the soil moisture control section for longer periods; and do not have aquic soil moisture regime.
Ness series: have smectitic mineralogy; and do not have secondary carbonates below 150 cm.

GEOGRAPHIC SETTING:
Parent material: clayey lacustrine sediments of Pleistocene age
Landscape: high plains
Landform: playas
Slope: 0 to 1 percent
Mean annual precipitation: 432 to 584 mm (17 to 23 in)Mean annual air temperature: 12 to 14 degrees C (53 to 57 degrees F)
Frost-free period: 170 to 195 days
Elevation: 731.5 to 1249.7 m (2400 to 4100 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the similar Knoblaw and Lautz soils and the Balko, Canina, Dumas, Gruver, Hugoton, Oslo, Perryton, Sherm, Sunray, Twichell and Waka soils.
Knowblaw and Lautz soils: on similar landscape positions
Canina, Hugoton, Oslo, and Sunray soils: have a fine-silty particle size control-section and are on a higher landscape position
Dumas soils: have a fine-loamy particle size control-section and are on a higher landscape position
Balko(t), Gruver, Perryton, Sherm, and Twichell soils: have argillic horizons and are on a slightly higher landscape position
Waka soils: have a fine-silty particle size control section and are in a drainageway

DRAINAGE AND PERMEABILITY:
Drainage class: Poorly drained
Permeability: very slow
Runoff: ponded
Ponding: frequency-frequent; depth-10 to 91 cm (4 to 36 in); duration-long to very long

USE AND VEGETATION:
Major uses: livestock grazing and wildlife habitat
Native vegetation: Knotgrass, bur ragweed, sedges, spike rushes, smartweed, saltmarsh aster, curly dock, frog-fruit, and bushy knotweed. In areas of standing water longbarb arrowhead, soft-stem bulrush, and southern cattail may be present. Around the margins, where ponding occurs for shorter periods the woody vegetation includes western willow or cottonwood. Vegetation varies according to amount of water available.
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: Playa (R077AY005TX)

DISTRIBUTION AND EXTENT:
General Area: Texas and Oklahoma Panhandles
Land Resource Region: H-Central Great Plains Winter Wheat and Range Region
Major Land Resource Area 77A-Southern High Plains, Northern Part
Extent: Moderate

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

SERIES ESTABLISHED: Hansford County, Texas; 2007

REMARKS: These soils were formerly included in the Randall and Ness series.

User Pedon ID: P1998TX195005(TL)

Diagnostic horizons and features recognized in this pedon:
Aquic conditions: 0 to 185 cm (0 to 58 in) (Ap, Bssg1, Bssg2, Bkssg and Btkg horizons)
Redox concentrations: 0 to 203 cm (0 to 80 in) (Ap, Bssg1, Bssg2, Bkssg, Btkg and Btk horizons)
Episaturation: 0 to 185 cm (0 to 46 in) (Ap, Bssg1, Bssg2, Bkssg, and Btkg horizons).
Reduced matrix: 18 to 185 cm (7 to 46 in) (Bssg1, Bssg2, Bkssg, and Btkg horizons)
Slickensides: 18 to 147 cm (7 to 58 in) (Bssg1, Bssg2 and Bkss horizons)
Secondary carbonates: 117 to 203 cm (46 to 80 in) (Bkss, Btkg and Btk horizons)

ADDITIONAL DATA: none available

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

National Cooperative Soil Survey
U.S.A.