LOCATION PIXLEE                  OK

Established Series
Rev. TGM-TMK
10/2018

PIXLEE SERIES

The Pixlee series consists of very shallow to shallow, well drained, moderately rapid to moderately permeable soils that formed in residuum weathered from weakly cemented sandstone of the Elk City Formation of Permian age. These very gently sloping to moderately steep soils occur on hill slopes of plains. Slope ranges from 1 to 20 percent. Mean annual precipitation is about 737 mm (29 in) and the mean annual temperature is about 15 degrees C (59 degrees F).

TAXONOMIC CLASS: Loamy, mixed, active, thermic, shallow Typic Haplustepts

TYPICAL PEDON: Pixlee very fine sandy loam, on a southwest-facing, convex, 3 percent slope in pastureland at an elevation of about 600.5 m (1,970 ft).
(Colors are for dry soil unless otherwise stated.)

Ap--0 to 11 cm (0 to 4 in); red (2.5YR 4/6) dry, very fine sandy loam; dark red (2.5YR 3/6) moist; weak medium granular structure; friable, slightly hard, nonsticky, nonplastic; common very fine roots throughout and common very fine roots throughout, very slightly effervescent by HCl, 1 normal; moderately alkaline (pH 8.0); abrupt smooth boundary. Thickness is 5 to 25 cm (2 to 10 in).

Bw--11 to 28 cm (4 to 11 in); red (2.5YR 4/6) dry, very fine sandy loam; dark red (2.5YR 3/6) moist; strong medium subangular blocky structure; firm, hard, nonsticky, nonplastic; common very coarse roots throughout and common fine roots throughout; slightly effervescent by HCl, 1 normal; moderately alkaline (pH 8.2); abrupt smooth boundary. Thickness is 15 to 38 cm (6 to 15 in).

Cr--28 to 40 cm (11 to 16 in); red (2.5YR 5/6) dry; red (2.5YR 4/6) moist; weakly cemented sandstone bedrock; strongly effervescent by HCl, 1 normal; moderately alkaline (pH 8.2).

TYPE LOCATION:
Roger Mills County, Oklahoma; About 7.5 miles south of Hammon;
located about 2190 feet east and 1050 feet south of the northwest corner of sec. 13, T. 12 N., R. 21 W.

USGS topographic quadrangle: Carpenter, Oklahoma
Latitude: 35 degrees, 31 minutes, 13.6 seconds N
Longitude: 99 degrees, 22 minutes, 27.7 seconds W
Datum: WGS84

Decimal Degrees
Std Latitude: 35.5204528
Std Longitude: -99.3743722

UTM Northing: 3930826 m
UTM Easting: 466055 m
UTM Zone 14

RANGE IN CHARACTERISTICS:
Soil Moisture: A typic ustic moisture regime.
Thickness of ochric epipedon: 5 to 25 cm (4 to 10 in)
Depth to paralithic contact: 18 to 51 cm (7 to 20 in)

Particle-size control section (weighted average):
Total Clay content: 8 to 18 percent
Total Sand content: 55 to 80 percent
Particles 0.1 to 75 mm (fine sand and coarser): more than 15 percent

Ap horizon:
Hue: 2.5YR, 5YR
Value: 3 to 5 dry, 3 to 4 moist
Chroma: 3 to 8
Epipedons with 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, fine sandy loam
Total clay content: 8 to 18 percent
Carbonate clay content: 0 to 2 percent
Total Sand content: 60 to 85 percent
Calcium carbonate equivalent (CCE): 0 to 5 percent
Effervescence: none to slight
Reaction (pH): slightly acid to moderately alkaline (6.1-8.4)

Bw horizon:
Hue: 2.5YR, 5YR
Value: 4 to 5 dry, 3 to 4 moist
Chroma: 4 to 8
Texture: very fine sandy loam, fine sandy loam,
Total clay content: 8 to 18 percent
Carbonate clay content: 0 to 2 percent
Total Sand content: 55 to 85 percent
Calcium carbonate equivalent (CCE): 0 to 10 percent
Effervescence: none to slight
Reaction (pH): neutral slightly acid to moderately alkaline (6.1-8.4)

Cr horizon:
Hue: 10R, 2.5YR, 5YR
Value: 4 to 6 dry, 3 to 6 moist
Chroma: 4 to 8
Texture: sandstone that crushes to very fine sandy loam, fine sandy loam, or loam
Cementation: extremely weakly to moderately
Fractures that roots can enter: greater than 10 cm (4 in) apart in some part of this layer
Bulk density: root restrictive, generally greater than 1.80 g/cc
Effervescence: none to strong
Reaction (pH): neutral slightly acid to moderately alkaline (6.1-8.4)

COMPETING SERIES:
These are the Keese and Spikebox series in the same family. Similar soils are the Brackett, Cordell, Darnell, Ironmound, Lucien, Quinlan, and Whitewright series.
Brackett and Whitewright soils: have carbonatic mineralogy and formed in residuum derived from chalk and limestone.
Keese soils: formed in residuum weathered from granite, granite grus, or gneiss of pre-Cambrian age.
Quinlan soils: have a superactive clay activity class and are formedin residuum weathered from sandstone associated with the Whitehorse and Cloud Chief formations of Permian age.
Spikebox soils: are formed in residuum weathered mainly from the San Angelo formation of Permian age or equivalent units.
Cordell soils: have a lithic contact within 51 cm (20 in) of the soil surface.
Darnell, Ironmound, and Lucien soils: are moist in the control section for longer periods.

GEOGRAPHIC SETTING:
Parent material: loamy residuum weathered from extremely weakly to moderately cemented sandstone of the Elk City Formation of Permian age
Landscape: Plains, Dissected plains
Landform: summits, shoulders, and backslopes of interfluves and side slopes on hillslopes and/or hills
Slopes: 1 to 20 percent
Precipitation Pattern: The soil is intermittently moist in some part from April thru June, September, and October. The driest months are typically December thru February, July, and August.
Mean annual precipitation: 635 to 787 mm (25 to 31 in)
Thornthwaite P-E Index: 32 to 44
Mean annual air temperature: 14.0 to 16.1 degrees C (57 to 61 degrees F).
Frost-free period: 185 to 220 days.
Elevation: 472.5 to 685.8 m (1,550 to 2,250 ft).

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Dill, Cordell, Grandfield, Quinlan, and Woodward series.
Dill soils: occur on similar positions and are more than 50 cm (20 in) deep to bedrock.
Cordell soils: occur on lower positions, are associated with the Doxey Formation of Permian Age, and have a lithic contact with siltstone.
Grandfield soils: occur on adjacent broad summits, are more than 102 cm (40 in) deep to bedrock, and have an argillic horizon.
Quinlan soils: occur on lower positions and are associated with the Whitehorse and Cloud Chief Formations of the Permian age.
Woodward soils: occur on lower positions, are more than 50 cm (20 in) deep to bedrock, and are associated with the Whitehorse and Cloud Chief Formations of the Permian age.

DRAINAGE AND PERMEABILITY:
Drainage class: Well drained
Permeability class: Moderately rapid in the solum, moderately slow to moderate in the bedrock
Runoff: medium on 1 to 5 percent slopes and high on 5 to 20 percent slopes

USE AND VEGETATION:
Major uses: crop production, livestock grazing, and wildlife habitat
Native vegetation: mainly mid and tall 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: Shallow Prairie

DISTRIBUTION AND EXTENT:
General area: Distribution is restricted to the Elk City Sandstone Formation in western Oklahoma and possibly adjoining areas of Texas
Land Resource Region: H - Central Great Plains Winter Wheat and Range Region
MLRA 78C - Central Rolling Red Plains, Eastern Part
Extent: moderate

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

SERIES ESTABLISHED: During the project "MLRA 78C - Dill Series Update on Elk City Sandstone" in Beckham, Custer, Roger Mills, and Washita Counties, Oklahoma; 2011. The name of the series comes from the Thompson Pixlee Cemetery in far south-western Custer County, Oklahoma.

REMARKS: Pixlee soils were previously mapped as Quinlan soils. It was established to replace Quinlan on the Elk City Sandstone which has a superactive mineralogy class and texture difference.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 0 to 28 cm (0 to 11_in) (Ap & Bw horizons)
Ochric epipedon: 0 to 11 cm (0 to 4 in) (Ap horizon)
Cambic horizon: 11 to 28 cm (4 to 11 in) (Bw horizon)
Paralithic contact: 28 cm (11 in) the top of the Cr horizon.

ADDITIONAL DATA:
KSSL data: Pedon IDs - S2011OK129011, type location (Roger Mills County, OK), and S2011OK149017 (Washita County, OK)

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

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National Cooperative Soil Survey
U.S.A.