LOCATION ASHPORT OK

Established Series
JEH Rev. JGF:GFS:JBB
01/2016

ASHPORT SERIES

The Ashport series consists of very deep, well drained soils that formed in loamy alluvium of Holocene age. These soils are on flood plains along small streams in the Central Rolling Red Prairies (MLRA 80A). Slopes range from 0 to 3 percent. Mean annual precipitation is about 840 mm (33 in), and the mean annual air temperature is about 16 degrees C (61 F).

TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Fluventic Haplustolls

TYPICAL PEDON: Ashport silty clay loam, in a cultivated field, at an elevation of 267 m (875 ft). (Colors are for dry soil unless otherwise stated.)

Ap--0 to 13 cm (0 to 5 in); dark reddish gray (5YR 4/2) silty clay loam, dark reddish brown (5YR 3/2) moist; weak fine subangular blocky structure; hard; firm; many fine roots; slightly acid; abrupt smooth boundary. (Thickness of the Ap horizon is 0 to 20 cm [0 to 8 in])

A--13 to 41 cm (5 to 16 in); dark reddish gray (5YR 4/2) silty clay loam, dark reddish brown (5YR 3/2) moist; moderate medium subangular blocky structure; hard, firm; many fine roots; neutral; clear smooth boundary. (Thickness of the A horizon is 0 to 41 cm [0 to 16 in])

Bw--41 to 91 cm (16 to 36 in); reddish brown (5YR 5/4) silty clay loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure parting to moderate coarse subangular blocky; hard, firm; few fine roots; slightly acid; clear smooth boundary. (Thickness of the Bw horizon is 36 to 137 cm [14 to 54 in])

Ab--91 to 132 cm (36 to 52 in); dark reddish gray (5YR 4/2) loam, dark reddish brown (5YR 3/2) moist; weak coarse prismatic structure parting to weak medium granular; slightly hard, friable; slightly acid; gradual smooth boundary. (Thickness of the Ab horizon is 0 to 51 cm [0 to 20 in])

Bwb1--132 to 168 cm (52 to 66 in); reddish brown (5YR 5/4) loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure parting to weak medium subangular blocky; slightly hard, friable; slightly acid; gradual smooth boundary. (Combined thickness of the Bwb horizon is 0 to 100 cm [0 to 40 in])

Bwb2--168 to 200 cm (66 to 80 in); yellowish red (5YR 5/6) loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure parting to weak coarse subangular blocky; slightly hard, friable; neutral.

TYPE LOCATION: Payne County, Oklahoma; about 1/2 mile west of Stillwater, Oklahoma; 2,440 ft east and 920 ft north of the southwest corner of sec. 16, T. 19 N., R. 2 E.

USGS topographic quadrangle: Stillwater South, OK
Latitude: 36 degrees, 7 minutes, 7 seconds N
Longitude: 97 degrees, 5 minutes, 49 seconds W
Datum: NAD 83

Decimal Degrees:
Latitude: 36.1186111
Longitude: -097.0969444

UTM Easting: 671270 m
UTM Northing: 3998781 m
UTM Zone: 14

RANGE IN CHARACTERISTICS:
Depth to bedrock: more than 203 cm (80 in)
Depth to buried horizons: 61 to more than 150 cm (24 to more than 60 in)
Mollic thickness: 31 to 48 cm (12 to 19 in)
Depth to secondary calcium carbonates: 51 to more than 152 cm (20 to more than 60 in)

Particle-size control section (weighted average):
Clay content: 20 to 30 percent
Sand Content: 5 to 20 percent with less than 15 percent fine and coarser sand.

Ap and A horizon:
Hue: 5YR to 10YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 2 or 3 dry or moist
Texture: silt loam, loam, clay loam, or silty clay loam
Effervescence: none
Reaction: moderately acid to moderately alkaline

Bw horizon:
Hue: 2.5YR to 7.5YR
Value: 3 to 5 dry, 3 or 4 moist
Chroma: 3 to 6 dry or moist
Texture: silt loam, loam, silty clay loam, or clay loam
Effervescence: Slight in some pedons
Reaction: slightly acid to moderately alkaline

Ab horizon:
Hue: 5YR or 7.5YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 2 to 4 dry or moist
Texture: loam or silt loam
Effervescence: Slight in some pedons
Reaction: slightly acid to moderately alkaline

Bwb horizon:
Hue: 2.5YR to 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 or 6 dry or moist
Texture: loam or silt loam
Effervescence: Slight in some pedons
Reaction: slightly acid to moderately alkaline

COMPETING SERIES: These are the Asher , Goodcreek , and Lamkin series in the same family. These soils all are calcareous throughout the 10- to 40-inch control section.

GEOGRAPHIC SETTING:
Parent material: loamy alluvium of Holocene age
Landscape: alluvial plain
Landform: flood plains
Slope: 0 to 3 percent
Mean Annual Air Temperature: 13.9 to 17.2 degrees C (57 to 63 degrees F)
Mean Annual Precipitation: 787 to 1041 mm (31 to 41 in)
Frost-Free Period: 181 to 230 days
Elevation: 213 to 475 meters (700 to 1600 ft)
Thornthwaite Annual P-E indices: 44 to 64

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dale, Port, and Pulaski series.
Dale and Port soils: have a mollic epipedon more than 51 cm (20 in) thick.
Dale soils: occur slightly higher flood plains that are rarely flooded.
Port soils: occur on similar landforms, but are usually further from the stream channel.
Pulaski soils: have a coarse-loamy control section and occur on similar landforms, but are generally nearer to the stream channel.

DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderate
Runoff: negligible
Flooding: occasionally or frequently flooded for very brief to brief periods during March to August

USE AND VEGETATION: Used mainly as cropland and hayland. Alfalfa, small grains, and grain sorghum are the most common crops. Some areas are used for improved pasture or livestock grazing. Native vegetation is big bluestem, switchgrass, Indiangrass, and little bluestem with an overstory of pecan, black walnut, bur oak, and eastern cottonwood trees.

DISTRIBUTION AND EXTENT: Central Oklahoma; LRR H, MLRA 80A. The series is extensive.

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

SERIES ESTABLISHED: Payne County, Oklahoma; 1982.

REMARKS:

These soils were formerly included in the Port series in older published reports. Updated as a result of the SDJR initiative (WTS 4/2014).

Diagnostic horizons and features recognized in this pedon are
Mollic epipedon: 0 to 41 cm (0 to 16 in) (Ap and A horizons)
Cambic horizon: 41 to 91 cm (16 to 36 in (Bw horizon)
Buried soils: 91 to 201 cm (36 to 80 in) (2Ab, 2Bwb1, and 2Bwb2)
Moisture Regime: Udic-Ustic

ADDITIONAL DATA: Oklahoma State University lab data number 76-OK-60-33.

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

National Cooperative Soil Survey
U.S.A.