LOCATION LELA OK+KS

Established Series
HMG Rev. GFS:JBB:JLD
02/2016

LELA SERIES

The Lela series consists of very deep, somewhat poorly drained soils that formed in clayey alluvium. These soils are on nearly level to slightly concave flood plains in the Central Rolling Red Prairies (MLRA 80A). Slope ranges from 0 to 1 percent. Mean annual air temperature is 15 degrees C (59 degrees F), and mean annual precipitation is 860 mm (34 in).

TAXONOMIC CLASS: Fine, mixed, superactive, thermic Udic Haplusterts

TYPICAL PEDON: Lela silty clay, on a 0.5 percent slope, in cropland, at an elevation of 290 m (950 ft). (Colors are for dry soil unless otherwise stated.)

Ap--0 to 15 cm (0 to 6 in); dark reddish brown (5YR 3/2) crushed silty clay; dark reddish brown (5YR 2/2) crushed moist; moderate fine angular blocky structure parting to strong fine granular; very hard, firm; common fine roots; noneffervescent; moderately acid (pH 6.0); abrupt smooth boundary. (Thickness of the Ap horizon 0 to 25 cm [0 to 10 in])

A--15 33 cm (6 to 13 in); dark reddish brown (5YR 3/2) crushed silty clay; dark reddish brown (5YR 2/2) crushed moist; strong very fine and fine angular blocky structure; very hard, very firm; few fine roots; few very fine and fine constricted tubular pores; noneffervescent; neutral (pH 7.0); clear wavy boundary. (Thickness of the A horizon is 10 to 30 cm [4 to 12 in])

Bss1--33 to 86 (13 to 34 in); dark reddish brown (5YR 3/2) crushed silty clay; dark reddish brown (5YR 2/2) crushed moist; moderate medium angular blocky structure parting to strong very fine and fine angular blocky; very hard, very firm; few very fine roots; common very fine and fine constricted tubular pores; common intersecting slickensides tilted at an angle of 20 to 40 degrees; few pressure faces on faces of peds; noneffervescent; slightly alkaline (pH 7.5); gradual wavy boundary.

Bss2--86 to 107 cm (34 to 42 in); dark reddish brown (5YR 3/2) crushed; and 20 percent dark reddish gray (5YR 4/2) silty clay; dark reddish brown (5YR 2/2) crushed, and 20 percent dark reddish brown (5YR 3/2) moist; moderate coarse angular blocky structure parting to strong very fine and fine angular blocky; very hard, very firm; few very fine and fine roots; few very fine and fine constricted tubular pores; cracks 1 to 2 cm wide filled with dark reddish brown (5YR 3/2) surface material; common intersecting slickensides tilted at an angle of about 45 degrees; common pressure faces on faces of peds; slightly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary.

Bss3--107 to 135 cm (42 to 53 in); dark reddish gray (5YR 4/2) crushed silty clay; dark reddish brown (5YR 3/2) crushed moist; moderate coarse angular blocky structure parting to strong very fine and fine angular blocky; very hard, very firm; few fine roots; few very fine and fine constricted tubular pores; cracks 0.5 to 3 cm wide filled with dark reddish brown (5YR 3/2) surface material; common dark reddish brown (5YR 3/2) intersecting slickensides tilted at an angle of about 45 degrees; common pressure faces on faces of peds; slightly effervescent; moderately alkaline (pH 8.0); clear wavy boundary. (Combined thickness of the Bss horizon is 51 to 114 cm [20 to 45 in])

Bkss1--135 to 155 cm (53 to 61 in); reddish gray (5YR 5/2) silty clay; dark reddish gray (5YR 4/2) moist; moderate coarse angular blocky structure parting to strong very fine and fine angular blocky; very hard, very firm; few fine roots between peds; few very fine constricted tubular pores; cracks 0.5cm to 2cm wide filled with dark reddish brown (5YR 3/2) surface material; common dark reddish brown (5YR 3/2) intersecting slickensides tilted at an angle of about 30 degrees; common pressure faces on faces of peds; few fine rounded calcium carbonate concretions; strongly effervescent ; moderately alkaline (pH 8.0); gradual wavy boundary.

Bkss2--155 to 183 cm (61 to 72 in); reddish brown (5YR 4/4) silty clay; dark reddish brown (5YR 3/4) moist; moderate coarse angular blocky structure parting to strong very fine and fine angular blocky; very hard, very firm; few fine roots between peds; cracks 1 to 3 cm wide filled with dark reddish brown (5YR 3/2) surface material; common reddish brown (5YR 5/3) intersecting slickensides tilted at an angle of about 30 degrees; common pressure faces on faces of peds; few black stains on horizontal faces of peds; common fine rounded calcium carbonate concretions, and common medium rounded calcium carbonate concretions; strongly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary. (Combined thickness of the Bkss horizon is 50 to 114 cm [20 to 45 in])

Bkss3--183 to 221 cm (72 to 87 in); reddish brown (5YR 4/4) silty clay; dark reddish brown (5YR 3/4) moist; moderate coarse angular blocky structure parting to moderate very fine angular blocky; very hard, very firm; few very fine roots between peds; cracks 1 to 3 cm wide filled with dark reddish brown (5YR 3/2) surface material, some cracks tilted at about 30 degrees; common dark reddish brown (5YR 3/2) intersecting slickensides tilted at an angle of about 45 degrees; common pressure faces on faces of peds; few fine calcium carbonate concretions, and common medium calcium carbonate concretions; strongly effervescent; moderately alkaline (pH 8.0).

TYPE LOCATION: Noble County, Oklahoma; about 2 miles north and 6 miles west of Marland, OK. 2,500 feet south and 50 feet west of the northeast corner of sec. 1, T. 24 N., R. 1 W.

USGS topographic quadrangle: Tonkawa SE, OK
Latitude 36 degrees, 35 minutes, 13 seconds N
Longitude 97 degrees, 14 minutes, 50 seconds W
Datum: NAD 83

Decimal Degrees:
Latitude: 36.5869444 degrees
Longitude: -097.2472222 degrees

UTM Easting: 656801 m
UTM Northing: 4050482 m
UTM Zone: 14

RANGE IN CHARACTERISTICS:
Depth to bedrock: greater than 203 cm (280 in)
Other features: In undisturbed areas, the soil has gilgai microrelief. The cycles of microlows and microhighs are repeated at linear intervals of 2 to 4 meters (6 to 12 ft)
The amplitude of the boundary between the A and B horizons ranges from about 25 to 102 cm (10 to 40 in) within the limits of the pedon. These soils have cracks at least 0.5 cm wide that extend from below 51 cm (20 in) to the surface during the summer in at least 6 out of 10 years
Depth to intersecting slickensides: occur between 25 and 102 cm (10 and 40 in)

Ap and A horizons:
Hue: 5YR to 10YR
Value: 2 to 4, where the A horizons are less than 30 cm (12 in) thick, the moist value is less than 3.5 to depths of more than 30 cm (12 in)
Chroma: 1 to 3 dry or moist, where chroma of 1 occur between depths of 38 to 51 cm (15 to 20 in), the 1 chroma material will make up less than half of the horizon
Texture: silty clay loam, silty clay, or clay
Effervescence: none
Reaction: slightly acid to slightly alkaline

Bss horizons:
Hue: 5YR to 10YR
Value: 3 to 5 dry, 2 to 4 moist
Chroma: 2 to 4 dry or moist
Texture: silty clay or clay
Intersecting slickensides: few to many
Calcium carbonate: amount-1 to 15 percent; size-1 to 20 mm; kind-concretions or masses
Effervescence: none to slight
Reaction: slightly alkaline or moderately alkaline

Bkss horizons:
Hue: 5YR to 10YR
Value: 3 to 5 dry, 3 or 4 moist
Chroma: 2 to 4 dry or moist
Texture: silty clay or clay
Intersecting slickensides: few to many
Calcium carbonate: amount-1 to 15 percent; size-1 to 20 mm; kind-concretions or masses
Effervescence: slight to strong
Reaction: slightly alkaline or moderately alkaline

COMPETING SERIES: These are no other known series in the same family. Similar soils in MLRA 80A are the Padgett, Tamford, and Watonga series.
Padgett and Tamford soils: do not have a mollic epipedon
Watonga soils: have better internal drainage

GEOGRAPHIC SETTING:
Parent material: formed in calcareous clayey alluvium of Pleistocene age
Landscape: alluvial plains
Landform: nearly level to concave flood plain soils in the Central Rolling Red Prairies (MLRA-80A)
Slope: 0 to 1 percent
Mean annual precipitation: 660 to 1020 mm (26 to 40 in)
Mean annual air temperature: 14 to 18 degrees C (58 to 64 degrees F)
Frost-free period: 181 to 240 days
Elevation: 259 to 488 m (850 to 1600 ft)
Thornthwaite Annual P-E indices: 44 to 64

GEOGRAPHICALLY ASSOCIATED SOILS: These are Asher, Braman, Brewer, Dale, Gaddy, Keokuk, McLain, Miller, Port, Reinach, and Yahola soils.
Asher, Braman, Dale, and Port soils: have a fine-silty control section
Brewer and McLain soils: have an argillic horizon
Gaddy soils: have a sandy control section
Keokuk and Reinach soils: have a coarse-silty control section
Miller soils: do not have wedge-shaped structural aggregates or intersecting slickensides
Yahola soils: have a coarse-loamy control section
Asher, Braman, Brewer, Dale, Keokuk, McLain, and Reinach soils: occur on similar landform positions
Gaddy, Miller, Port, and Yahola soils: occur on lower flood plains closer to the stream channel

DRAINAGE AND PERMEABILITY:
Drainage: somewhat poorly drained
Permeability: slow
Runoff: slow
Flooding: rarely or occasionally flooded for very brief periods during April to October

USE AND VEGETATION: Mainly cultivated to small grains, grain sorghums, and alfalfa. Minor areas are used for tame pasture or rangeland. Native vegetation consists of tall and mid grasses with a small percentage of hardwood trees. The main trees are pecan, American elm, and eastern cottonwood.

DISTRIBUTION AND EXTENT: Oklahoma and Kansas; LRR H, Central Rolling Red Prairies, MLRA 80A; the series is moderately extensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Pawnee County, Oklahoma; 1954.

REMARKS:
Updated for the SDJR Initiative. (JLD 02/2016)

Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 135 cm (0 to 53 in) (A horizon and Bss horizons)
Cambic horizon: 33 to 221 cm (13 to 87 in) (Bss and Bkss horizons)
Slickensides: 33 to 221 cm (13 to 87 in) (Bss and Bkss horizons)

ADDITIONAL DATA: KSSL lab sample S90OK-103-007, complete characterization.

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

National Cooperative Soil Survey
U.S.A.