LOCATION MASON                   OK+KS

Established Series
Rev. JFH-JCR-RGC
09/2015

MASON SERIES

The Mason series consists of very deep moderately well drained soils that formed in material weathered from silty alluvium of Pleistocene Age. These nearly level to gently sloping soils are on broad flood plains in the Cherokee Prairies (MLRA 112). Slope ranges from 0 to 3 percent. Mean annual precipitation is about 991 mm (39 inches). Mean annual air temperature is about 15 degrees C (59 degrees F.)

TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Pachic Argiudolls

TYPICAL PEDON: Mason silt loam-in a cultivated field on a stream terrace, at an elevation of 215 meters (705 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 20 centimeters (0 to 8 inches); dark brown (10YR 3/3) silt loam, dark grayish brown (10YR 4/2) dry; weak fine granular structure; slightly hard, friable; slightly acid; smooth boundary. [15 to 25 centimeters (6 to 10 inches) thick]

A--20 to 36 centimeters (8 to 14 inches); dark brown (10YR 3/3) silt loam, dark grayish brown (10YR 4/2) dry; moderate fine and medium granular structure; slightly hard, friable; slightly acid; gradual smooth boundary. [13 to 31 centimeters (5 to 12 inches) thick]

Bt1--36 to 56 centimeters (14 to 22 inches); dark brown (10YR 3/3) silty clay loam, brown (10YR 4/3) dry; moderate medium subangular blocky structure; slightly hard, friable; patchy clay films on faces of peds; slightly acid; gradual smooth boundary. [15 to 56 centimeters (6 to 22 inches) thick)]

Bt2--56 to 76 centimeters (22 to 30 inches); brown (10YR 4/3) silty clay loam, dark yellowish brown (10YR 4/4) dry; moderate medium subangular blocky structure; very hard, firm; nearly continuous clay films on faces of peds; few dark-colored concretions; moderately acid; gradual smooth boundary. [0 to 46 centimeters (0 to 18 inches) thick]

BC--76 to 122 centimeters (30 to 48 inches); dark yellowish brown (10YR 4/4) clay loam; yellowish brown (10YR 5/4) dry; weak medium subangular blocky structure; hard, firm; moderately acid; gradual smooth boundary. [20 to 58 centimeters (8 to 23 inches) thick)]

C--122 to 165 centimeters (48 to 65 inches); dark yellowish brown (10YR 4/4) clay loam, yellowish brown (10YR 5/4) dry; massive; hard, firm; moderately acid.

TYPE LOCATION: Washington County, Oklahoma; about 13 kilometers (8 miles) east of Bartlesville, Oklahoma; 393 meters (1,290 feet) east and (61 meters) 200 feet north of the southwest corner of sec. 16, T. 26N., R. 14 E. USGS Oglesby, Oklahoma topographic quadrangle; lat. 36 degrees 43 minutes 41.88 seconds N. and long. 95 degrees 49 minutes 23.19 seconds W.; UTM Zone 15; 247891.00 easting and 4068455.00 northing; NAD 83.

RANGE IN CHARACTERISTICS:
Mollic epipedon: 28 to 87 centimeters (11 to 34 inches)
Particle size control section (weighted average):
Clay content: 25 to 35 percent
Sand content: 5 to 30 percent

A or Ap horizons:
Hue: 7.5YR or 10YR
Value: 2 or 3
Chroma: 2 or 3
Texture: loam, silt loam, silty clay loam, or clay loam
Reaction: strongly acid to neutral.

Bt1 horizon:
Hue: 7.5YR or 10YR
Value: 2 or 3
Chroma: 2 or 3
Texture: loam, silt loam, silty clay loam, or clay loam
Reaction: moderately acid to neutral.

Bt2 horizon:
Hue: 7.5YR or 10YR
Value: 3 or 4
Chroma: 2 to 4
Texture: loam, silt loam, silty clay loam, or clay loam
Reaction: strongly acid to neutral

BC horizon:
Hue: 7.5YR or 10YR
Value: 3 or 4
Chroma: 2 to 4
Texture: loam, silt loam, silty clay loam, or clay loam
Redoximorphic features: shades of brown, red, or gray
Reaction: strongly acid to neutral

C Horizon:
Hue: 5YR to 10YR
Value: 4 or 5
Chroma: 2 to 4
Texture: loam, silt loam, clay loam, or silty clay loam or it has strata of these textures
Redoximorphic features: shades of brown, red, or gray
Reaction: very strongly acid to slightly alkaline

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: These soils are on stream terraces or benches of flood plains on river valleys. Slope ranges from 0 to 3 percent. The soils formed in silty alluvial materials of Pleistocene Age. Mean annual precipitation ranges from 813 to 1194 mm (32 to 47 inches). Mean annual temperature ranges from 10.6 to 17 degrees C (51 to 63 degrees F). Elevation is 144.8 to 388.6 m (475 to 1275 feet) above mean sea level. Thornthwaite P-E index is 64 to 78.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Caspiana, Garton, Muldrow, Okay, Pledger, and Roebuck soils along rivers and the Lighting, Osage, Radley, Verdigris, and Wynona soils on major creeks in lower positions. Caspina soils are higher and closer to the river. Garton soils are slightly lower, have a fine control section and farther from the river. Muldrow, Pledger, and Roebuck soils are farther from the river in back swamp positions and have a fine control section. Okay soils occur on terraces and do not have a mollic epipedon more than 51 centimeters (20 inches) thick. Osage soils have a fine control section. Radley, Verdigris, and Wynona soils do not contain an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well and moderately well drained. Potential for surface runoff is low to medium. Saturated hydraulic conductivity is moderately low. Mason series is subject to rare flooding.

USE AND VEGETATION: Mainly cultivated cropland. Principal crops are alfalfa, grain sorghums, soybeans, and small grains. Some areas are used for tame pasture. Native vegetation is mixed forest of elm, oak, hackberry, and pecan, and tall grasses.

DISTRIBUTION AND EXTENT: MLRAs 76, 84A, 112, 117 in southeastern Kansas and northeast Oklahoma. The series is moderately extensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana

SERIES ESTABLISHED: Okfuskee County, Oklahoma; 1940.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 56 centimeters (0 to 22 inches) (A and Bt1 horizons)
Argillic horizon: 36 to 76 centimeters (14 to 30 inches) (Bt horizons)

ADDITIONAL DATA:
Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

TABULAR SERIES DATA:

NASIS:  Data mapunit ID 751075 represents Mason silt loam, 0 to 1 percent slopes, rarely flooded

Supporting NSSC Soil Characterization Lab data pedons:
None

Supporting User Pedons:
1965OK147006
1972KS019014
1972KS207013
1972OK145017
1974KS0030010
1975KS001008
1975OK105013
1978KS125009
1979KS011012
1979KS059012
1979KS121007
1980KS031012
1982KS139011
1984KS049017
1984OK101024
1985KS205013

Soil Interpretation Record No. OK0097

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National Cooperative Soil Survey
U.S.A.