LOCATION DILL                    OK

Established Series
Rev. HHM-CS-TGM
10/2018

DILL SERIES

The Dill series consists of moderately deep, well drained, moderately rapidly permeable soils that formed in residuum weathered from weakly cemented sandstone bedrock of the Elk City Formation of Permian age. These nearly level to strongly sloping soils occur on hillslopes of plains. Slope ranges from 0 to 12 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: Coarse-loamy, mixed, active, thermic Typic Haplustepts

TYPICAL PEDON: Dill very fine sandy loam, on a southeast-facing, 2 percent slope in a pastureland at an elevation of 555 m (1820 ft).
(Colors are for dry soil unless otherwise stated.)

Ap1--0 to 16 cm (0 to 6 in); red (2.5YR 4/6) dry, very fine sandy loam; reddish brown (2.5YR 4/4) moist; moderate medium subangular blocky parting to strong medium granular structure; friable, slightly hard, nonsticky, nonplastic; many very fine roots throughout, common fine roots throughout and common medium roots throughout; strongly effervescent; moderately alkaline (pH 8.3); abrupt smooth boundary.

Ap2--16 to 37 cm (6 to 15 in); red (2.5YR 4/6) dry, very fine sandy loam; reddish brown (2.5YR 4/4) moist; moderate medium angular blocky structure; friable, slightly hard, nonsticky, nonplastic; common very fine roots throughout and common fine roots throughout; strongly effervescent; strongly alkaline (pH 8.8); abrupt wavy boundary. Combined thickness of the A horizons is 10 to 41 cm (4 to 16 in).

Bw1--37 to 67 cm (15 to 26 in); red (2.5YR 4/8) dry, very fine sandy loam; red (2.5YR 4/6) moist; weak medium prismatic structure; friable, slightly hard, nonsticky, nonplastic; common very fine roots throughout and common fine roots throughout; slightly effervescent; strongly alkaline (pH 8.8); gradual smooth boundary.

Bw2--67 to 96 cm (26 to 38 in); red (2.5YR 4/8) dry, very fine sandy loam; red (2.5YR 4/6) moist; weak medium prismatic structure; friable, slightly hard, nonsticky, nonplastic; common very fine roots throughout and common very fine roots throughout; slightly effervescent; strongly alkaline (pH 8.7); abrupt smooth boundary. Combined thickness of the Bw horizons is 20 to 91 cm (8 to 36 in).

Cr--96 to 127 cm (38 to 50 in); red (10R 4/8) dry, weakly cemented sandstone; red (10R 4/8) moist; noneffervescent; moderately alkaline (pH 8.4).

TYPE LOCATION:
Washita County, Oklahoma; about 6 mile south and 1 mile west of Canute; 1,500 feet south and 105 feet east of the northwest corner of sec. 23, T. 10 N., R. 20 W. in pastureland.

USGS topographic quadrangle: Elk City SE, Oklahoma
Latitude: 35 degrees, 19 minutes, 49.67 seconds N
Longitude: 99 degrees, 17 minutes, 36.77 seconds W
Datum: WGS84

Decimal Degrees
Std Latitude: 35.3304634
Std Longitude: -99.2935486

UTM Northing: 3909730.7 m
UTM Easting: 473321.3 m
UTM Zone 14

RANGE IN CHARACTERISTICS:
Soil Moisture: A typic ustic moisture regime.
Thickness of ochric epipedon: 10 to 41 cm (4 to 16 in)
Depth to paralithic contact: 51 to 102 cm (20 to 40 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

A horizons:
Hue: 2.5YR, 5YR
Value: 3 to 5 dry, 2.5 to 4 moist
Chroma: 4 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 10 percent
Effervescence: none to strong
Reaction (pH): slightly acid to moderately alkaline (6.1-8.4)

Bw horizon:
Hue: 2.5YR, 5YR
Value: 4 to 5 dry, 3 to 5 moist
Chroma: 3 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 15 percent
Effervescence: none to strong
Reaction (pH): slightly acid to strongly alkaline (6.1-9.0)

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
Identifiable secondary carbonate: some pedonshave fractures in the bedrock that are coated with calcium carbonate
Effervescence: none to strong
Reaction (pH): slightly acid to moderately alkaline (6.1-8.4)

COMPETING SERIES:
These are the Hext series in the same family. Similar soils are the Deepwood, Enterprise, Gotebo, Hardeman, Obaro, Shrewder, and Woodward series.
Hext soils: have free carbonates throughout the soil profile and formed in material weathered from calcareous sandstone or siltstone of Lower Cretaceous Age
Deepwood, Enterprise, Gotebo, and Woodward soils: are coarse-silty in the particle-size control section; in addition, Deepwood and Enterprise are more than 152 cm (60 in) deep to bedrock
Hardeman and Shrewder soils: are more than 152 cm (60 in) deep to bedrock
Obaro soils: are fine-silty in the particle-size control section

GEOGRAPHIC SETTING:
Parent material: loamy residuum weathered from extremely weakly to moderately cemented sandstone of the Elk City Formation of Permian age.
Landscape: dissected plains and uplands
Landform: interfluves and side slopes of hillslopes and hills
Slope: 0 to 12 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 Cordell, Grandfield, Pixlee, Quinlan, and Woodward series.
Cordell and Quinlan soils: occur on lower positions associated with the Doxey, Whitehorse, and Cloud Chief Formations and are less than 51 cm (20 in) deep to bedrock
Grandfield soils: occur on adjacent slightly higher convex interfluves, are more than 102 cm (40 in) deep to bedrock, and have an argillic horizon
Pixlee soils: occur on similar positions and are less than 51 cm (20 in) deep to bedrock
Woodward soils: occur on lower positions associated with the Whitehorse and Cloud Chief Formations and have a coarse-silty particle-size control section

DRAINAGE AND PERMEABILITY:
Drainage class: Well drained
Permeability class: Moderately rapid
Runoff: negligible on less than 1 percent slopes, very low on 1 to 5 percent slopes, and low on 5 to 12 percent slopes

USE AND VEGETATION:
Major uses: mainly crop production
Native vegetation: sideoats grama, little bluestem, blue grama, buffalograss, sand lovegrass, sand bluestem, and switchgrass
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: Sandy Loam

DISTRIBUTION AND EXTENT:
General area: Distribution should be 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: Washita County, Oklahoma; 1935.

REMARKS:
Dill soils were formerly classified in the Reddish Chestnut great soil group.
Dill soils were updated on the Elk City Sandstone Formation as part of the progressive update project in 2011.

Diagnostic horizons and features in this pedon are:
Particle-size control section: 37 to 96 cm (15 to 38_in) (Bw horizons)
Ochric epipedon: 0 to 37 cm (0 to 15 in) (Ap horizons)
Cambic horizon: 37 to 96 cm (15 to 38 in) (Bw horizons)
Paralithic contact: 96 cm (38 in), the top of the Cr horizon.

ADDITIONAL DATA:
KSSL data: Pedon IDs - S2011OK149016, type location (Washita County, OK), and S2011OK009021 (Beckham County, OK)
Oklahoma State University data: Sample No. 75-OK-75-4

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

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National Cooperative Soil Survey
U.S.A.