LOCATION DOOLIN                  OK

Established Series
Rev. CS,JBB
04/2011

DOOLIN SERIES

The Doolin series consists of very deep, moderately well drained soils. The Doolin soils upper part formed in old alluvium and the lower part formed in sandstone of Permian age. These soils are on slightly concave to linear summits of paleoterraces on high stream divides in the Central Rolling Red Prairies (MLRA 80A). Slopes range from 0 to 3 percent. Mean annual air temperature is about 15 degrees C (59 degrees F), and mean annual precipitation is about 914 mm (36 in).

TAXONOMIC CLASS: Fine, smectitic, thermic Typic Natrustolls

TYPICAL PEDON: Doolin silt loam--on a 0.5 percent slope--rangeland. (Colors are for dry soil unless otherwise stated.)

A--0 to 30 cm (0 to 12 in); grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; moderate medium granular structure; slightly hard, friable; slightly acid; abrupt smooth boundary. (25 to 38 cm [10 to 15 in] thick)

Btn1--30 to 51 cm (12 to 20 in); brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; strong coarse columnar structure parting to moderate medium blocky; hard, firm; common prominent clay films on faces of peds; common fine distinct reddish brown concentrations of oxidized iron; few fine dark brown concretions; organic matter staining on faces of peds; exchangeable sodium percentage is 16; neutral; clear smooth boundary. (15 to 36 cm [6 to 14 in] thick)

Btn2--51 to 81 cm (20 to 32 in); brown (10YR 4/3) silty clay loam, dark brown (10YR 3/3) moist; moderate medium blocky structure; hard, firm; common distinct clay films on the faces of peds; few fine distinct strong brown concentrations of oxidized iron; organic matter staining between faces of peds; exchangeable sodium percentage is 15; noneffervescent; slightly alkaline; gradual smooth boundary. (0 to 53 cm [0 to 21 in] thick)

2Btn3--81 to 122 cm (32 to 48 in); brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; weak coarse prismatic structure; hard, firm; few distinct clay films on faces of peds; many medium prominent strong brown (7.5YR 5/6) and dark yellowish brown (10YR 4/4) concentrations of oxidized iron; many threads of salts; exchangeable sodium percentage is 18; few medium and fine calcium carbonate concretions; noneffervescent; slightly alkaline; gradual smooth boundary. (23 to 76 cm [9 to 30 in] thick)

2Btn4--122 to 173 (48 to 68 in); reddish yellow (7.5YR 6/8) clay loam, strong brown (7.5YR 5/8) moist; many coarse prominent gray (10YR 5/1) and light gray (10YR 7/2) iron depletions, and many coarse prominent red (2.5YR 4/8) redoximorphic concentrations; weak coarse prismatic structure; hard, firm; few distinct clay films on faces of peds; exchangeable sodium percentage is 18; noneffervescent; slightly alkaline; abrupt smooth boundary. (0 to 89 cm [0 to 35 in] thick)

2Cr--173 to 178 cm (68 to 70 in); strong brown (7.5YR 5/6) sandstone.

TYPE LOCATION: Payne County, Oklahoma; about 10 miles east and 3 miles north of Stillwater; 1,100 feet west and 50 feet south of the northeast corner of sec. 2, T. 19 N., R. 4 E. Latitude 36 degrees, 9 minutes, 32 seconds North; Longitude 96 degrees, 50 minutes, 26 seconds West; NAD 83. West Point, OK USGS Topographic Quadrangle.

RANGE IN CHARACTERISTICS:
Depth to secondary calcium carbonate: more than 76 cm (30 in)
Solum thickness: more than 152 cm (60 in) and commonly is the same as the depth to bedrock

Ap or A horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 2
Texture: very fine sandy loam, loam, or silt loam
EC (dS/m): 0 to 2
SAR: 0 to 5
ESP: 0 to 20
Reaction: moderately acid to slightly alkaline

Btn horizons:
Hue: 7.5YR or 10YR
Value: 4 or 6
Chroma: 2 to 6
Texture: silty clay loam, clay loam, silty clay, or clay
Redox concentrations: amount- 2 to 19 percent; colors- shades of red or brown; contrast - faint to prominent location- in the matrix
Redox depletions:
Iron manganese concretions: 0 to 5 percent by volume
EC (dS/m): 0 to 2
SAR: 1 to 20
ESP: 15 to 20 percent
Other features: Some pedons have ped faces with a value and chroma lower than the matrix
Effervescence: none
Reaction: slightly acid to moderately alkaline

2Btn horizons:
Hue: 2.5YR to 7.5YR
Value: 4 to 6
Chroma: 3 to 8
Texture: sandy clay loam or clay loam
Redox concentrations: amount- 3 to 30 percent; color- shades of red or brown; contrast- faint to prominent location-in the matrix
Redox depletions: amount- 3 to 30 percent; color-shades of gray, contrast-distinct to prominent location-in the matrix
Identifiable secondary calcium carbonate: few fine concretions
EC (dS/m): 2 to 6
SAR: 1 to 20
ESP: 15 to 20 percent
Effervescence: none
Reaction: slightly acid to moderately alkaline

2Cr horizon:
Red or brown sandstone

COMPETING SERIES: There are no other series in the same family. Soils in similar families in MLRA 80A are the Drummond, Huska, Pawhuska, and Seminole series.
Drummond, Huska, Pawhuska, and Seminole soils: have mixed mineralogy
Drummond and Pawhuska soils: have ochric epipedons
Drummond soils: have a solum less than 152 cm (60 in) thick and are on flood plains
Huska soils: do not have a lithologic discontinuity, and are 102 to 152 cm to sandstone
Seminole soils: do not have an abrupt textural change between the A and Btn horizons, and do not have sandstone bedrock

GEOGRAPHIC SETTING:
Parent material: The upper part formed in old alluvium and the lower part formed in residuum from sandstone of Permian age
Landform: slightly concave to linear summits of paleoterraces on high stream divides
Slope: 0 to 3 percent
Mean Annual Precipitation: 830 to 1020 mm (34 to 40 in)
Mean Annual Temperature: 14 to 16 degrees C (58 to 60 degrees F)
Thornthwaite Annual P-E indices: 44 to 64

GEOGRAPHICALLY ASSOCIATED SOILS: These are the similar Pawhuska series and the Kirkland, Renfrow, Chickasha, and Zaneis series.
Chickasha and Zaneis soils: do not have a natric horizon, have a fine-loamy control section, and occur on side slopes below the Doolin soils
Kirkland and Pawhuska soils: are on similar landscapes.
Renfrow soils: are commonly on upper side slopes below the Doolin soils

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: Moderately well drained
Saturated hydraulic conductivity: low
Runoff: negligible on concave areas, high on 0 to 1 percent slopes and very high on 1 to 3 percent slopes
Wetness characteristics do not reflect current redoximorphic features, but are relict

USE AND VEGETATION: Most areas have been cultivated and are now in low condition grasses such as threeawn. These areas are used for rangeland. Some areas are cultivated to small grains or improved pasture. Native vegetation is mainly mid and short grass prairie. The Ecological Site is Claypan Prairie (North) PE 44-64 (R080AY010OK).

DISTRIBUTION AND EXTENT: Central Rolling Red Prairies (MLRA 80A) of Oklahoma. The series is not extensive.

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

SERIES ESTABLISHED: Payne County, Oklahoma; 1983 by J.E. Henley

REMARKS: These soils were formerly included in the Kirkland series.
Updated competing series, taxonomic version, saturated hydraulic conductivity, and formatting. 6/2008 JBB


Diagnostic horizons and features recognized in this pedon are:

Mollic epipedon: 0 to 81 cm (0 to 32 in) (A and Btn horizons)
Argillic horizon: 30 to 173 cm (12 to 68 in) (Bt horizons)
Natric horizon: 30 to 173 cm (12 to 68 in) (Btn horizons)
Lithologic discontinuity: contrasting material at a depth of 81 cm (32 in)
Paralithic contact: sandstone bedrock at a depth of 173 cm (68 in)

ADDITIONAL DATA: Sample No. 79-OK-60-5 by Oklahoma State University.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Eleventh Edition, 2010

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National Cooperative Soil Survey
U.S.A.