LOCATION LATRASS                 OK

Established Series
Rev. CRC-CS-CEW-CMR
06/2020

LATRASS SERIES

The Latrass series consists of deep, well drained, very slowly permeable soils that are reconstructed from clayey materials over landfills. These nearly level to steep soils are mainly on uplands. Slope range is 1 to 45 percent. Mean annual precipitation is about 928 mm (36.5 in), and mean annual air temperature is about 16 degrees C (61 degrees F).

TAXONOMIC CLASS: Fine, methanogenic, mixed, active, nonacid, thermic Anthrodensic Ustorthents

TYPICAL PEDON: Latrass loam-Constructed on a northwest facing, 1 percent slope; elevation is 401 m (1316 ft). (Colors are for dry soil unless otherwise stated.)

^Ap--0 to 20 cm, (0 to 8 in); reddish brown (5YR 4/4) loam, dark reddish brown (5YR 3/4) moist; massive; hard, friable; slightly alkaline; clear smooth boundary. (Thickness is 15 to 41 cm [6 to 16 in].)

^C--20 to 56 cm (8 to 22 in); red (2.5YR 4/6) clay loam, dark red (2.5YR 3/6) moist; massive; extremely hard, very firm; moderately alkaline; gradual smooth boundary. (Thickness is 36 to 91 cm [14 to 36 in].)

^Cd--56 to 107 cm (22 to 42 in); red (2.5YR 5/6) clay, red (2.5YR 4/6) moist; massive; extremely hard, extremely firm; moderately alkaline. (Thickness is 25 to 71 cm [10 to 28 in].)

2^Cu--107 to 200 cm (42 to 80 in); artifacts of general refuse of trash, garbage, rocks, and/or concrete; moderately alkaline. (Thickness is 78 to 100 cm [31 to 40 in].)

TYPE LOCATION: Oklahoma County, Oklahoma; about 1 mile south and 1 mile east of Valley Brook, Oklahoma; located about 825 feet north and 350 feet west of the southeast corner of sec. 25, T. 11 N., R. 3 W.

USGS topographic quadrangle: Midwest City, Oklahoma
Latitude: 35 degrees, 23 minutes, 45 seconds N
Longitude: 97 degrees, 27 minutes, 38 seconds W
Datum: WGS84

Decimal Degrees
Std Latitude: 35.3959110
Std Longitude: -97.4604510

UTM Easting: 639811.94
UTM Northing: 3918037.63
UTM Zone: 14N

RANGE IN CHARACTERISTICS: These soils have high bulk density due to extreme compaction during construction.

Soil Moisture: udic-ustic soil moisture regime
Thickness of anthropic epipedon: 15 to 25 cm (6 to 8 in)
Thickness of human-transported material: Greater than 200 cm (80 in)
Depth to anthrodensic contact: 50 to 100 cm (20 to 40 in)
Depth to artifacts: 100 to 122 cm (40 to 48 in)

Particle-size control section (weighted average):
Total clay content: 35 to 60 percent

^Ap horizon:
Hue: 5YR or 7.5YR
Value: 4 or 5
Chroma: 2 to 4
Texture: loam, clay loam or silty clay loam
Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

^C horizon:
Hue: 2.5YR to 7.5YR
Value: 4 to 6
Chroma: 3 to 6
Texture: silty clay, clay, silty clay loam, or clay loam
Total clay content: 35 to 60 percent
Reaction (pH): slightly alkaline to moderately alkaline (7.4 to 8.4)

^Cd horizon:
Hue: 2.5YR to 7.5YR
Value: 4 to 6
Chroma: 3 to 6
Texture: silty clay, clay, silty clay loam, or clay loam
Total clay content: 35 to 60 percent
Reaction (pH): slightly alkaline to moderately alkaline (7.4 to 8.4)

2^Cu horizon:
Artifacts of general refuse of trash, garbage, rocks, and/or concrete

COMPETING SERIES: There are no competing series in the same family.

GEOGRAPHIC SETTING:
Parent material: clayey human-transported material over artifactic human-transported material
Landscape: anthroscape
Landform: sanitary landfill
Latrass soils are reconstructed and are found on any landform.
Slope: 1 to 45 percent
Mean annual precipitation: 660 to 965 mm (26 to 38 in)
Mean annual air temperature: 14 to 17 degrees C (58 to 64 degrees F)
Thornthwaite annual P-E indices: 44 to 64
Frost-free period: 185 to 230 days
Elevation: 213 to 430 m (699 to 1,411 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coyle, Grainola, Ironmound, Kingfisher, Norge, Renfrow, Renthin, and Teller soils. All of these soils are on similar positions. Ironmound soils have a loamy control section and bedrock within 20 inches of the soil surface. Coyle and Kingfisher soils have a mollic epipedon and a solum 20 to 40 inches thick. Grainola soils have a solum 20 to 40 inches thick. Norge and Renfrow soils have a mollic epipedon and a solum greater than 60 inches thick. Renthin soils have a mollic epipedon and a solum 40 to 60 inches thick. Teller soils have a mollic epipedon, fine loamy control section and a solum greater than 50 inches thick.

DRAINAGE AND PERMEABILITY:
Drainage class: Well drained
Permeability class: very slow
Runoff: very high on 1 to 45 percent slopes

USE AND VEGETATION:
Major uses: These are manmade soils that can be revegetated to various grass species depending upon climatic conditions.
Ecological sites are not assigned to phases and components of this series.

DISTRIBUTION AND EXTENT:
General area: Central Oklahoma
Land Resource Region: H - Central Great Plains Winter Wheat and Range Region
Major Land Resource Area: 80A - Central Rolling Red Prairies
Extent: small

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

SERIES ESTABLISHED: Oklahoma County, Oklahoma; 1995.

REMARKS: The series was formerly classified according to the seventh edition of the Keys to Soil Taxonomy as Fine, mixed, active, nonacid, thermic Haplic Ustarents.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 25 to 56 cm (10 to 22 in)
Control section for Human-Transported Classes: 0 to 200 cm (0 to 80 in)
Anthropic Epipedon: 0 to 25 cm (0 to 10 in)
Human-Transported Material: 0 to 200 cm (0 to 80 in)
Densic Contact: 56 to 56 cm (22 to 22 in)
Densic Materials: 56 to 107 cm (22 to 42 in)
Lithologic discontinuity: 107 cm (42 in)
Artifacts: 107 to 200 cm (42 to 80 in)

Additional Comments: Soil Interpretation Record Number: OK0451.

Landfill cover reconstructed material, less than four feet thick.

ADDITIONAL DATA: None

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

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National Cooperative Soil Survey
U.S.A.