LOCATION MASON              OK+KS

Established Series
Rev. JFH JCR
03/2006

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). Slopes range from 0 to 3 percent. Mean annual precipitation is 99 centimeters (39 inches). Mean annual air temperature is 15 degrees C (59 degrees F.)

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

TYPICAL PEDON: Mason silt loam--cultivated.

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.

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 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: 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
Redoximorphic features: shades of brown, red, or gray.
Texture: loam, silt loam, silty clay loam, or clay loam
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 in this family.

GEOGRAPHIC SETTING:
Landform: benches of flood plains that are subject to rare flooding.
Slopes: 0 to 3 percent.
Parent material: silty alluvial materials of Pleistocene Age
Mean annual precipitation: 91 to 109 centimeters (36 to 43 inches)
Mean annual temperature: 14 to 17 degrees C (58 to 63 degrees F)
Thornthwaite P-E index: 64 to 78

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

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: Well and moderately well drained
Runoff: low to medium
Saturated hydraulic conductivity: moderately low

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: Eastern Oklahoma, Kansas, Texas, and possibly Louisiana. The series is of moderate extent.

MLRA OFFICE RESPONSIBLE: Salina, Kansas

SERIES ESTABLISHED: Okfuskee County, Oklahoma; 1940.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 56 centimeters (0 to22 inches) (A and Bt1 horizons)
Argillic horizon: 36 to 76 centimeters (14 to 30 inches) (Bt hozions)

Soil Interpretation Record No. OK0097

Modified format by LRM in 1/2006 to include metric conversion

National Cooperative Soil Survey
U.S.A.