LOCATION WYNONA             OK

Established Series
Rev. JFH CRC CS
07/2005

WYNONA SERIES

The Wynona series consists of very deep, somewhat poorly drained soils that formed in silty alluvium of Pleistocene age. These soils are on nearly level to slightly concave flood plains which drain the Cherokee Prairies (MLRA 112). Slopes range from 0 to 3 percent. Mean annual air temperature is 15 degrees C (59 degrees F). Mean annual precipitation is 107 centimeters (42 inches).

TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Cumulic Epiaquolls

TYPICAL PEDON: Wynona silty clay loam--tame pasture. (Colors are for moist soil unless otherwise stated.)

A1--0 to 20 centimeters (0 to 8 inches); very dark gray (10YR 3/1) silty clay loam, dark gray (10YR 4/1) dry; moderate medium granular structure; slightly hard, friable; slightly acid; gradual smooth boundary. (0 to 56 centimeters (0 to 22 inches thick)

A2--20 to 58 centimeters (8 to 23 inches); black (10YR 2/1) silty clay loam, very dark gray (10YR 3/1) dry; with few fine distinct yellowish red redoximorphic concentrations; weak medium subangular blocky structure parting to moderate medium granular structure; hard, firm; moderately acid; gradual smooth boundary. (0 to 38 centimeters (0 to 15 inches thick)

A3--58 to 89 centimeters (23 to 35 inches); very dark gray (10YR 3/1) silty clay loam, dark gray (10YR 4/1) dry; with common fine distinct strong brown redoximorphic concentrations; weak medium subangular blocky structure; hard, firm; moderately acid; gradual smooth boundary. (20 to 64 centimeters (8 to 25 inches thick)

Bg1--89 to 119 centimeters (35 to 47 inches); very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry; with common medium distinct strong brown (7.5YR 5/6) redoximorphic concentrations; weak medium blocky structure; hard, firm; common fine black concretions; moderately acid; gradual smooth boundary. (0 to 71 centimeters (0 to 28 inches thick)

Bg2--119 to 160 centimeters (47 to 63 inches); dark gray (10YR 4/1) silty clay, gray (10YR 5/1) dry; with common coarse distinct strong brown (7.5YR 5/6) and few fine distinct light brownish gray redoximorphic concentrations and depletions; weak medium blocky structure; hard, firm; few fine black concretions; moderately acid.

TYPE LOCATION: Osage County, Oklahoma; about 4 miles south and l mile west of Skiatook; about 579 meters (1,900 feet) south and 21 meters (70 feet) west of the northeast corner of sec. 9, T. 2l N., R. 12 E.

RANGE IN CHARACTERISTICS:
Solum thickness: (102 centimeters (40 inches) to more than 152 centimeters (60 inches)
Depth to bedrock: greater than 183 centimeters (72 inches)
Thickness of the mollic epipedon: to more than 102 centimeters (61 centimeters (24 inches) to more than 40 inches)
Some pedons have buried horizons below 102 centimeters (40 inches)
Particle size control section (weighted average):
Clay content: 27 to 35 percent

A horizon (upper portion):
Hue: 10YR
Value: 2 or 3
Chroma: 1 or 2
Texture: silt loam or silty clay loam.
Reaction: moderately acid or slightly acid

A horizon (lower portion):
Hue: 10YR
Value: 2 to 4
Chroma: 1 or 2
Redoximorphic features: shades of red, brown and gray
Texture: silt loam or silty clay loam.
Reaction: strongly acid or moderately acid

Bg horizon:
Hue: 10YR
Value: 3 or 4
Chroma: 1 or 2
Redoximorphic features: shades red, brown, or gray
Texture: silty clay loam or silty clay
Reaction: strongly acid to slightly acid

COMPETING SERIES: This is the Hopco series.
Hopco soils are neutral to alkaline throughout and allow 2.5Y colors.

GEOGRAPHIC SETTING:
Landform: nearly level or slightly concave floodplains
Parent Material: formed in loamy alluvium
Slope: 0 to 1 percent
Flooding: occasionally flooded for very brief periods of time during January through July
Episaturation: within 2 feet of the soil surface for short periods of time during November through April
Mean annual precipitation: 91 to 117 centimeters (36 to 46 inches)
Mean annual temperature: 14 to 18 degrees C (57 degrees to 64 degrees F.)
Thornthwaite P-E indices are from 60 to 76.

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the competing Verdigris series and the Mason and Osage series.
Mason soils have argillic horizons and lack redoximorphic features in the mollic epipedon.
Osage soils have a fine control section and have high shrink-swell properties.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: Somewhat poorly drained
Runoff: negligible to medium
Saturated hydraulic conductivity: moderately low

USE AND VEGETATION: Mainly used for tame pasture.
Some areas are cultivated to small grain, grain sorghum, soybean, or alfalfa and some are used for native range or native hay meadows.
Native vegetation consists of bottomland hardwoods with an understory of grasses.

DISTRIBUTION AND EXTENT: Northeastern Oklahoma and possibly southeastern Kansas. The series is of moderate extent.

MLRA OFFICE RESPONSIBLE: Salina, Kansas

SERIES ESTABLISHED: Osage County, Oklahoma; 1975.

REMARKS: Soil Interpretation Record No. OK0172

Diagnostic horizons and features recognized in this pedon are:

Mollic epipedon- zone from surface of soil to a depth of 35 inches (A horizon)

Aquic moisture regime

Wynona soils were formerly included with Verdigris soils and classified in the Alluvial great soil group.

8/1/2000: Updated OSD was forwarded by Chuck Sample for Okfuskee County, Oklahoma update.

National Cooperative Soil Survey
U.S.A.