LOCATION RADLEY                  KS+MO OK

Established Series
Rev. JMA-CEW-RGC
09/2015

RADLEY SERIES

The Radley series consists of very deep, moderately well drained soils that formed in stratified silty alluvium. These soils are on flood plains. Slope ranges from 0 to 3 percent. Mean annual precipitation is about 1092 mm (43 inches), and mean annual temperature is about 16.1 degrees C (61 degrees F).

TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Fluventic Hapludolls

TYPICAL PEDON: Radley silt loam - in a cultivated field on a floodplain step, at an elevation of 263 meters (863 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 31 centimeters (0 to 12 inches); very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; weak medium granular structure; hard, friable; moderately acid; clear smooth boundary. [25 to 61 centimeters (10 to 24 inches) thick]

Bw--31 to 58 centimeters (12 to 23 inches); dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR 6/2) dry; weak medium granular structure; hard, friable; moderately acid; gradual smooth boundary. [0 to 51 centimeters (0 to 20 inches) thick)]

C--58 to 107 centimeters (23 to 42 inches); brown (10YR 4/3) silt loam with less clay than horizon above, pale brown (10YR 6/3) dry; massive; hard, friable; few fine strata of slightly lighter colored material containing more fine and very fine sand; moderately acid; gradual smooth boundary. [25 to 76 centimeters (10 to 30 inches) thick]

Ab--107 to 203 centimeters (42 to 80 inches); very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; massive; hard, friable; common fine strata as in horizon above; moderately acid. [25 centimeters to several meters (10 inches to several feet) thick]

TYPE LOCATION: Crawford County, Kansas; about .8 kilometers (.5 mile) north and 1.6 kilometers (1 mile) west of Monmouth; 244 meters (800 feet) west and 61 meters (200 feet) south of the northeast corner of sec. 11, T. 31 S., R. 22 E. USGS West Mineral, Kansas topographic quadrangle; lat. 37 degrees 22 minutes 6.31 seconds N. and long. 94 degrees 57 minutes 41.16 seconds W.; UTM Zone 15; 326316.00 easting and 4137550.00 northing; NAD 83.

RANGE IN CHARACTERISTICS:
Thickness of solum: 25 to 76 centimeters (10 to 30 inches)
Thickness of the mollic epipedon: 25 to 61 centimeters (10 to 24 inches)
Reaction: very strongly acid to neutral

Ap or A horizons:
Hue: 7.5YR, 10YR, or 2.5Y
Value: 2 or 3, 3 to 5 dry
Chroma: 1 to 3
Texture: silt loam or light silty clay loam

Bw horizon:
Hue: 10YR or 7.5YR
Value: 3 to 5, 5 to 7 dry
Chroma: 2 to 4
Texture: silt loam or light silty clay loam
Redoximorphic features: colors having chroma more than 2 but not within depths of 51 centimeters (20 inches) in some pedons

C and Ab horizons:
Colors: like the B
Horizons contain thin strata with colors of higher and lower value and varying textures.

COMPETING SERIES: This is the Bardwell series. Bardwell series have 0 to 35 percent rock fragments in the BC and C horizons.

GEOGRAPHIC SETTING: Radley soils are on nearly level flood plains on river valleys. Slopes are dominantly less than 1 percent but range from 0 to 3 percent. The soils formed in stratified silty alluvium. Climate is moist subhumid to humid. Mean annual precipitation ranges from 970 to 1190 mm (38 to 47 inches). Mean annual temperature ranges from 14 to 18 degrees C. (57 to 64 degrees F.). Elevation is 152 to 282 meters (500 to 925 feet) above mean sea level. Thornthwaite Annual P-E Index is 64 to 82.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dennis, Parsons, Cherokee, Lula, McCune, Wynona, Mason, Lightning, Osage, Verdigris and Zaar. Verdigris and Wynona soils contain a mollic epipedon greater than 61 cm thick. McCune soils occur on flood plain steps. Dennis, Parsons, Cherokee and Lula soils occur on uplands. Zaar soils contain an argillic horizon. Osage and Lightning soils have a fine control section and high shrink-swell properties.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. Potential for surface runoff is negligible to very low. Saturated hydraulic conductivity is moderately high. Radley series is subject to frequent to occasional flooding.

USE AND VEGETATION: Soils are used for crops or used as woodland and pasture. Principal crops are alfalfa, corn, and sorghum. Native vegetation is lowland hardwood forest.

DISTRIBUTION AND EXTENT: MLRA 112 in southeastern Kansas, southwestern Missouri, and eastern Oklahoma. The series is moderately extensive.

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

SERIES ESTABLISHED: Crawford County, Kansas, 1969.

REMARKS:
Diagnostic horizons and features recognized in this pedon:
Mollic epipedon: 0 to 30 centimeters (0 to 12 inches) (Ap and A horizons)
Cambic horizon: 30 to 58 centimeters (12 to 23 inches (Bw horizon)
Organic carbon content: decreases irregularly with increasing depth

Modified format by LRM in 3/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.

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

TABULAR SERIES DATA:

NASIS:  Data mapunit ID 751078 represents Radley silt loam, 0 to 1 percent slopes, frequently flooded
Data mapunit ID 751079 represents Radley silt loam, 0 to 1 percent slopes, occasionally flooded

Supporting NSSC Soil Characterization Lab data pedons:
1960OK131001
60OK131002
2004MO217002
1995MO097003

Supporting User Pedons:
1975OK105018
1972OK145024
1968OK035021

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National Cooperative Soil Survey
U.S.A.