LOCATION TRIBBEY            OK

TRIBBEY SERIES

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid, thermic Oxyaquic Udifluvents

TYPICAL PEDON: Tribbey fine sandy loam -- improved pasture. (Colors are for moist soil unless otherwise stated.)

A--0 to 10 inches; red (2.5YR 4/6) fine sandy loam, red (2.5YR 5/6) dry; weak fine granular structure; slightly hard, very friable; faint stratification; slightly alkaline; clear smooth boundary. (4 to 14 inches thick)

C1--10 to 40 inches; red (2.5YR 4/6) fine sandy loam; massive; slightly hard, very friable; common thin strata of darker and lighter colored loamy fine sand and fine sand; saturated with water at 30 inches; moderately alkaline; clear smooth boundary. (15 to 60 inches thick)

C2--40 to 50 inches; red (2.5YR 4/6) fine sandy loam; massive; slightly hard, very friable; many thin strata of lighter colored loamy fine sand and fine sand; saturated with water; moderately alkaline; clear smooth boundary. (0 to 50 inches thick)

Ab--50 to 65 inches; very dark grayish brown (10YR 3/2) loam; common fine distinct red (2.5YR 4/6) masses of iron accumulation and gray (10YR 5/1) iron depletions; weak fine granular structure; slightly hard, friable; saturated with water; moderately alkaline.

TYPE LOCATION: Pottawatomie County, Oklahoma; about 5 miles west and 1 mile south of Bethel; 1,400 feet south and 200 feet east of the northwest corner of sec. 33, T. 10 N., R. 2 E.

RANGE IN CHARACTERISTICS: Buried soils are common at depth of 30 to 55 inches but are not diagnostic. This soil is saturated with water in one or more layers within 100 cm of the mineral soil surface, for 1 month or more per year in 6 or more out of 10 years.

The A horizon has hue of 2.5YR to 10YR, value of 3 to 5 , and chroma of 3 to 8. Texture is fine sandy loam, loamy fine sand, loam, or clay loam. Reaction ranges from moderately acid to moderately alkaline.

The C horizons have hue of 2.5YR to 10YR, value of 4 or 5, and chroma of 4 to 8. Redoximorphic features in shades of gray, brown, or red occur in some pedons below 30 inches. Texture is fine sandy loam, loam, or loamy very fine sand to a depth of 40 inches. Texture is loamy fine sand, fine sandy loam, or loam below a depth of 40 inches. Thin strata of darker and lighter colored, finer or coarser materials occur throughout the C horizon. Reaction ranges from moderately acid to moderately alkaline.

The Ab horizon has hue of 5YR to 10YR, value of 3 or 4, and chroma of 2 to 4. Redoximorphic features are in shades of red, brown, or gray. Texture is loam, clay loam, sandy clay loam or fine sandy loam. Reaction ranges from neutral to moderately alkaline.

Some pedons have a Cb horizon that is like the Ab horizon in texture, color, and reaction.

COMPETING SERIES: There is no series in the same family.

GEOGRAPHIC SETTING: Tribbey soils are on nearly level or very gently sloping narrow flood plains in the Cross Timbers (MLRA-84A). They formed in sandy and loamy alluvial sediments of Recent age. Slopes range from 0 to 2 percent. The climate is moist subhumid. Mean Annual Precipitation: 30 to 40 inches. Mean Annual Temperature: 58 to 62 degrees F. Thornthwaite Annual P-E indices: 48 to 64. Elevation ranges from 800 to 1200 feet. Frost free days range from 200 to 230 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Pulaski soils. Pulaski soils usually occur on slightly higher areas.

DRAINAGE AND PERMEABILITY: Tribbey soils are somewhat poorly drained; runoff is medium; and permeability is moderate to moderately rapid. These soils have endosaturation from a depth of 0.5 foot to 3.5 feet from October to May. These soils are frequently flooded for brief periods throughout the year.

USE AND VEGETATION: Used mainly for improved pasture and rangeland. Native vegetation consists of eastern cottonwood, pecan, American elm, and willow trees with an understory of tall grasses.

DISTRIBUTION AND EXTENT: Northern Cross Timbers (MLRA 84A) of Oklahoma. The series is of moderate extent.

MLRA OFFICE RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Pottawatomie County, Oklahoma; 1974.

REMARKS: These soils were formerly included in the Pulaski series.
Diagnostic horizons and features in this pedon are:
Ochric epipedon - zone from the soil surface to about 10 inches (A horizon).
Fluventic features - the zone from 10 to 50 inches that has an irregular decrease in organic matter content (C1, C2 horizons).
Oxyaquic Udifluvents features - soils with a udic moisture regime that have an apparent water (endosaturation) table within 20 to 40 inches of the soil surface.

Soil Interpretation Record: OK0019 Tribbey Series