LOCATION DELA                    OK+AR LA TX

Established Series
Rev. RTM, CS, MJB
06/2020

DELA SERIES

The Dela series consists of very deep, moderately well drained, moderately rapidly permeable soils that formed in loamy and sandy alluvium. These soils are on Coastal Plain, Ouachita Mountains, and Arkansas Valley and Ridges local stream flood plains. Slopes are 0 to 2 percent. Mean annual precipitation is about 1219 mm (48 in) and the mean annual air temperature is about 17.2 degrees C (63 degrees F.)

TAXONOMIC CLASS: Coarse-loamy, siliceous, active, nonacid, thermic Typic Udifluvents

TYPICAL PEDON: Dela fine sandy loam--cultivated. At an elevation of 135 m (443 ft). (Colors are for moist soil unless otherwise stated.)

Ap--0 to 15 cm (0 to 6 in); dark grayish brown (10YR 4/2) fine sandy loam; moderate medium granular structure; friable; slightly acid; clear smooth boundary.

A1--15 to 31 cm )6 to 12 in); brown (10YR 4/3) fine sandy loam; moderate medium granular structure; friable; slightly acid; clear smooth boundary. (Combined thickness of the A horizon is 20 to 61 cm [8 to 24 in])

C1--31 to 56 cm (12 to 22 in); yellowish brown (10YR 5/4) fine sandy loam; structureless; friable; thin strata of brown (10YR 4/3) fine sandy loam; slightly acid; clear smooth boundary.

C2--56 to 91 cm (22 to 36 in); light yellowish brown (10YR 6/4) fine sandy loam; few medium distinct dark brown (7.5YR 3/4) mottles; structureless; friable; thin strata of pale brown (10YR 6/3) fine sandy loam; slightly acid; clear smooth boundary.

C3--91 to 140 cm (36 to 55 in); pale brown (10YR 6/3) loamy fine sand; structureless; friable; few medium faint grayish brown (10YR 5/2) redoximorphic depletion masses throughout; thin strata of brown (7.5YR 5/4) fine sandy loam; moderately acid; clear smooth boundary. (Thickness of the C horizon is 58 to 178 cm [23 to 70 in])

C4--140 to 183 cm (55 to 72 in); very pale brown (10YR 7/3) loamy fine sand; common medium distinct dark brown (10YR 3/3) mottles; ; structureless; friable; few medium distinct grayish brown (10YR 5/2) redoximorphic depletion masses throughout; strata of brownish yellow (10YR 6/6) fine sandy loam; strongly acid.

TYPE LOCATION: Pushmataha County, Oklahoma; about 8 miles southeast of Antlers; 1,360 feet west and 200 feet north of the southeast corner of sec. 14, T. 4 S., R. 17 E.

USGS Topographic Quadrangle: Rattan, OK
Latitude: 34 degrees 12 minutes 3.515 seconds N
Longitude: 95 degrees 29 minutes 14.36 seconds W

Decimal Degrees:
Latitude: 34.200976 degrees N
Longitude: 95.487322 degrees W
Datum: WGS84

RANGE IN CHARACTERISTICS:
All horizons range from neutral to strongly acid
The 25 to 102 cm (10 to 40 in) control section is fine sandy loam, sandy loam, or loam and is stratified with thin strata of finer or coarser material.
Ap or A horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 2 or 3
Texture: loamy fine sand, fine sandy loam, sandy loam or loam
Reaction (ph): strongly acid to neutral (5.1 to 7.3)

C horizon:
Hue: 7.5YR to 10YR
Value: 4 to 6
Chroma: 2 to 6
Other features: horizons with chroma 2 or less occur at depths of 102 to 152 cm (40 to 60 in)
Below the 102 cm (40 in) depth the texture is fine sandy loam, sandy loam, or loamy fine sand with thin strata of finer and coarser material
Buried horizons are below 102 cm (40 in) in some pedons. Clay content in these buried horizons range from 18 to 35 percent.
Redox concentrations: amount-none to common; size-fine to medium; contrast-faint to distinct; color-shades of brown and yellow; boundary-clear; location-throughout matrix
Redox depletions: amount-none to common; size-fine to medium; contrast-faint to distinct; color-shades of gray and grayish brown; boundary-diffused; location-throughout matrix
Iron-manganese concentrations: amount-none to few; size-fine to medium; kind-nodules
Reaction (ph): strongly acid to neutral (5.1 to 7.3)

COMPETING SERIES: There are no other series in the same family. Soils in closely related families include the Madill(OK), Toccoa(NC), Robinsonvulle(MS), Kaintuck(MO)
Madill and Toccoa series have mixed mineralogy, in addition the Toccoa soils have mica flakes throughout
Robinsonville series with mixed mineralogy and superactive CEC activity class
Kaintuck series with mesic temperature regime and superactive CEC activity class.

GEOGRAPHIC SETTING:
Parent Material: loamy and sandy alluvium
Landscape: Western Coastal Plains, Ouachita Mountains and Arkansas Valley and Ridges
Landform: flood plains
Slope: 0 to 2 percent
Mean annual precipitation: 1016 to 1676 cm (40 to 66 in)
Thornthwaite annual P-E Indices: greater than 64
Mean annual air temperature: 11 to 25 degrees C (52 to 77 degrees F)
Frost-free period: 213 to 273
Elevation: 15 to 152 m (50 to 500 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cupco(OK), Guyton(LA), Neff(OK), Pushmataha(OK) and Rexor(OK) series.
Cupco, Guyton, Neff, and Rexor soils have Bt2 horizons and fine-silty control sections, also they are in similar positions but are further from the stream channel. Pushmataha soils are on similar landscapes, but further from the stream channel.

DRAINAGE AND PERMEABILITY:
Drainage: moderately well drained
Permeability: moderately rapid
Runoff: low
Flooding frequency: frequently to rare frequency, for very brief to brief duration following intense thunderstorms during the months of December through June.
Seasonal high-water table: 91 to 152 cm (3 to 5 ft) below the surface from December through May.

USE AND VEGETATION: Most areas are used for tame pasture or woodland. Some areas are cultivated to grain sorghum, soybeans, and wheat. Native vegetation is southern red oak, green ash, hickory, sweetgum, eastern cottonwood, and shortleaf pine.

DISTRIBUTION AND EXTENT: Flood plains of Ouachita Mountains (MLRA 119), Arkansas Valley and Ridges of Oklahoma and Arkansas(MLRA 118), and Western Coastal Plains of Arkansas, Louisiana and Oklahoma (MLRA 133B). The series is of large extent.

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

SERIES ESTABLISHED: Haskell County, Oklahoma; 1972.

REMARKS: Soil Interpretation Record: Series OK0136
Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - 0 to 31 cm (0 to 12 in) (A horizon).
Particle size control section: 25 to 100 cm (10 to 40 in)(A1, C1, C2, C3 horizons)
Fluventic - irregular decrease in organic matter content with depth.
Redoximorphic depletions: 91 to 140 cm (36 to 56 in) (C2 horizon)
ADDITIONAL DATA: Sample No. 75-OK-64-5 by O. S. U. Laboratory, Stillwater, Oklahoma.

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

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National Cooperative Soil Survey
U.S.A.