LOCATION HEPLER KS+MOEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Mollic Endoaqualfs
TYPICAL PEDON: Hepler silt loam - in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; very dark gray (10YR 3/1) silt loam, grayish brown (10YR 5/2) dry; weak fine and medium granular structure; slightly hard, friable; moderately acid; clear smooth boundary. (6 to 10 inches thick)
E1--8 to 16 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR 6/2) dry; weak fine and medium granular structure; hard, friable; strongly acid; gradual wavy boundary.
E2--16 to 27 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry; weak medium subangular blocky structure; hard, friable; few fine distinct yellowish brown (10YR 5/4) irregularly shaped masses of iron accumulation with diffuse boundaries throughout; few fine pores; strongly acid; gradual wavy boundary. (Combined thickness of the E horizon is 10 to 30 inches.)
Btg1--27 to 32 inches; dark grayish brown (10YR 4/2) silty clay loam, grayish brown (10YR 5/2) dry; moderate medium and coarse subangular blocky structure; very hard, firm; few fine distinct yellowish brown (10YR 5/6) irregularly shaped masses of iron accumulation with diffuse boundaries throughout; common fine pores; ped surfaces coated with grayish brown (10YR 5/2) silt loam; very strongly acid; gradual wavy boundary.
Btg2--32 to 38 inches; dark gray (10YR 4/1) silty clay loam, gray (10YR 5/1) dry; weak medium blocky structure; very hard, very firm; common medium distinct yellowish brown (10YR 5/6) irregularly shaped masses of iron accumulation with diffuse boundaries throughout; thin clay films on some faces of peds; few fine black (N 2/0) strongly cemented manganese concretions throughout; very strongly acid; gradual wavy boundary. (Combined thickness of the Bt horizon is 6 to 25 inches.)
BCg--38 to 62 inches; dark gray (10YR 4/1) silty clay loam, gray (10YR 5/1) dry; weak coarse subangular blocky structure; very hard, very firm; many medium and coarse distinct yellowish brown (10YR 5/6) irregularly shaped masses of iron accumulation with diffuse boundaries throughout; very strongly acid.
TYPE LOCATION: Crawford County, Kansas; 2.5 miles south and 0.5 mile west of Walnut; 400 feet east and 2,440 feet north of the southwest corner, sec. 35, T. 28 S., R. 21 E.
RANGE IN CHARACTERISTICS:
Depth to argillic horizon: 16 to 30 inches
Depth to redox concentrations: 4 to 12 inches
Depth to endosaturation: 12 to more than 72 inches from January to May
Particle-size control section (weighted average):
Clay content: 18 to 35 percent
Sand content: 4 to 15 percent
Ap or A horizon:
Hue: 10YR
Value: 2 or 3, 3 to 5 dry
Chroma: 1 or 2
Texture: silt loam
Clay content: 15 to 19 percent
Base saturation: 59 to 79 percent
Reaction: slightly acid to strongly acid
E horizon:
Hue: 10YR or 2.5Y
Value: 4 or 5, 5 to 7 dry
Chroma: 2 or 3
Redoximorphic features: none to common masses of iron accumulations, none to common masses of iron-manganese, none to few iron-manganese concretions
Texture: silt loam
Clay content: 13 to 17 percent
Base saturation: 40 to 62 percent
Reaction: moderately acid to very strongly acid
B horizon:
Hue: 10YR or 2.5Y
Value: 3 to 5, 4 to 6 dry
Chroma: 1 or 2
Redoximorphic features: few to many masses of iron accumulations, none to few iron-manganese concretions, none to common masses of iron-manganese
Texture: silty clay loam or silt loam and ranges to silty clay in lower part
Clay content: 14 to 34 percent
Base saturation: 40 to 84 percent
Reaction: slightly acid to very strongly acid
2B horizon (where present):
Hue: 10YR or 2.5Y
Value: 3 to 5, 4 to 6 dry
Chroma: 1 or 2
Redoximorphic features: few to many masses of iron accumulations, none to few iron-manganese concretions, none to common masses of iron-manganese
Texture: silty clay loam or silt loam and ranges to silty clay in lower part
Clay content: 31 to 45 percent
Base saturation: 85 to 90 percent
Reaction: slightly acid to very strongly acid
COMPETING SERIES: There are no competing series. Similar soils are:
Loreauville soils are neutral to moderately alkaline in the B horizon
Leanna soils have a fine textured control section
Lightning soils have a fine textured control section
McCune soils have a lighter colored A horizon
Moniteau soils are in the mesic soil temperature regime
GEOGRAPHIC SETTING:
Landscape: River Valleys
Landform: high flood plains
Slopes: 0 to 3 percent
Parent material: silty alluvial sediments
Average annual precipitation: 40 to 45 inches
Annual Thornthwaite P-E Index: 64 to 78
Average annual temperature: 57 to 60 degrees F
GEOGRAPHICALLY ASSOCIATED SOILS:
Cherokee soils have a fine textured argillic horizons
Lightning soils have a fine textured argillic horizons
Mason soils contain a mollic epipedon
Osage soils have a mollic epipedon, are fine textured, and do not have an argillic horizon
Parsons soils have a fine textured argillic horizons
Radley soils have a mollic epipedon and do not have an argillic horizon
Verdigris soils have a mollic epipedon and do not have an argillic horizon
Wynona soils have a mollic epipedon and do not have an argillic horizon
DRAINAGE AND PERMEABILITY:
Drainage: Somewhat poorly
Runoff: low or very slow
Permeability: moderately slow
Flooding: occasionally or frequently flood
Water saturation: saturated with water from 12 to 36 inches below the surface during January to May in most years.
USE AND VEGETATION: Mostly cultivated. Principal crops are winter wheat, soybeans, grain sorghum, and corn. Native vegetation is hardwood forest with an understory of tall prairie grasses.
DISTRIBUTION AND EXTENT: Southeastern Kansas and southwestern Missouri. The series is of large extent.
MLRA OFFICE RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: Crawford County, Kansas, 1969.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 27 to 38 inches (Btg1 and Btg2 horizons)
Ochric epipedon: The zone from 0 to 8 inches (Ap horizon)
Albic horizon: The zone from 8 to 27 inches (E1 and E2 horizons)
Argillic horizon: The zone from 27 to 38 inches (Btg1 and Btg2 horizons)
Redoximorphic concentrations: In the zone from 16 to 62 inches (E2, Btg1, Btg2, and BCg horizons)
Endosaturation: The zone of saturation at 12 to 62 inches. (E1, E2, Btg1, Btg2, and BCg horizons)
Taxonomic Version: Keys to Soil Taxomony, Eighth Edition, 1998
ADDITIONAL DATA:
7/19/01 - PRF - formatted to semi tab. Included water saturation and redox features.