LOCATION HALLSUMMIT              LA+TX

Established Series
JPE:JDS:TMH
11/2022

HALLSUMMIT SERIES

The Hallsummit series consists of very deep, well drained, moderately slowly permeable soils that formed in thick loamy and clayey sediments on Tertiary-aged Coastal Plains. These soils are on broad sloping interfluves. Slope is dominantly 1 to 8 but ranges up to 12 percent. Mean annual precipitation is about 1,318 mm (52 in) and mean annual air temperature is about 18 degrees C (65 degrees F).

TAXONOMIC CLASS: Fine, mixed, semiactive, thermic Ultic Hapludalfs

TYPICAL PEDON: Hallsummit fine sandy loam, on a convex 3 percent slope, in pine and mixed hardwood woodland; elevation is 111.5 m (366 ft) (Colors are for moist soil unless otherwise noted.)

A--0 to 6 cm (0 to 2 in); brown (10YR 4/3) fine sandy loam; weak fine and medium granular structure; very friable; many fine and medium roots; many fine pores; many fragments of ironstone up to 1 cm long; moderately acid; abrupt smooth boundary. (Thickness is 6 to 20 cm [2 to 8 in])

E--6 to 18 cm (2 to 7 in); brown (7.5YR 5/3) fine sandy loam; weak fine and medium granular structure; very friable; common fine roots; few fine pores and wormcasts; many fragments of ironstone up to 1 cm long; moderately acid; clear wavy boundary. (Thickness is 7 to 49 cm [3 to 19 in])

Bt--18 to 28 cm (7 to 11 in); red (2.5YR 4/6) sandy clay loam; moderate medium subangular blocky structure; firm; few fine and medium roots; few fine pores; many fragments of ironstone up to 1 cm long; common distinct clay films on faces of peds; strongly acid; gradual wavy boundary.

Bt--28 to 94 cm (11 to 37 in); red (2.5YR 4/6) clay; common medium and coarse yellowish brown (10YR 5/6) mottles on exteriors of peds; strong medium subangular blocky structure; friable; few fine roots; many fine pores; few medium distinct yellowish brown (10YR 5/6) redox concentrations; common distinct clay films on faces of peds; strongly acid; gradual wavy boundary.

Bt3--94 to 164 cm (37 to 65 in); red (2.5YR 4/6) sandy clay loam; weak coarse prismatic structure parting to strong medium and coarse subangular blocky; firm and slightly brittle; pale brown coatings on vertical faces of peds; few fine and medium roots; common fine pores; few medium distinct yellowish brown (10YR 5/6) redox concentrations; few medium prominent pale brown (10YR 6/3) redox depletions ;common distinct clay films on faces of peds; pockets of yellowish-brown sandy loam; many sand grains are black; strongly acid; gradual wavy boundary. (Combined thickness of the Bt horizon is 129 to 151 cm [51 to 60 in])

BtC--164 to 185 cm (65 to 73 in); yellowish red (5YR 5/8) sandy clay loam; weak coarse subangular blocky structure; firm; pockets and streaks of light brownish gray fine sand; few pockets of red sandy loam; many sand grains are black; strongly acid; gradual wavy boundary (Thickness is 11 to 58 cm [4 to 23 in])

C--185 to 203 cm (73 to 80 in); strong brown (7.5YR 5/8) sandy loam; weak very coarse prismatic structure; firm; pockets and streaks of light brownish gray fine sand; few pockets of red sandy loam; many sand grains are black; strongly acid. (Thickness is 10 to 50 cm [4 to 20 in])

TYPE LOCATION: Caddo Parish, Louisiana; about 1.6 km (1 mi) west of junction of State Highway LA 169 and W. F. Davidson Road; 0.3 km (0.2 mi) northeast of pipeline in a pine plantation.

USGS topographic quadrangle: Keatchie, LA
Latitude: 32 degrees, 20 minutes, 55.90 seconds N
Longitude: 93 degrees, 59 minutes, 16.00 seconds W
Datum: WGS84

Decimal Degrees
Std Latitude: 32.3488611
Std Longitude: - 93.9877778

UTM Easting: 407052.12 m
UTM Northing: 3579534.18 m
UTM Zone: 15

RANGE IN CHARACTERISTICS:
Soil Moisture: An udic soil moisture regime. The soil moisture control section is not dry in any part for more than 90 days in normal years.
Mean annual soil temperature: 12 to 25 degrees C (54 to 77 degrees F)
Depth to argillic horizon: 13 to 55 cm (5 to 22 in)
Thickness of the ochric epipedon: 13 to 55 cm (5 to 22 in)
Thickness of the argillic horizon: 98 to 187 cm (39 to 74 in)
Particle-size control section (weighted average):
Total clay content: 25 to 45 percent
Sand content: 25 to 50 percent

A horizon:
Hue: 10YR
Value: 3 to 5
Chroma: 2 to 4
Texture: sandy loam, fine sandy loam, very fine sandy loam
Total clay content: 4 to 19 percent
Sand content: 53 to 73 percent
Rock fragments: amount-0 to 10 percent; kind-ironstone; size-gravel
Reaction (pH): strongly acid to slightly acid (5.1 to 6.5)

E horizon:
Hue: 5YR or 10YR
Value: 4 to 6
Chroma: 2 to 4
Texture: sandy loam, fine sandy loam, very fine sandy loam
Total clay content: 4 to 19 percent
Sand content: 53 to 73 percent
Rock fragments: amount-0 to 10 percent; kind-ironstone; size-gravel
Reaction (pH): strongly acid to slightly acid (5.1 to 6.5)

Bt horizon:
Hue: 2.5YR to 10YR
Value: 3 to 6
Chroma: 4 to 8
Texture: sandy clay loam, clay loam, sandy clay, or clay
Redox concentrations: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse to clear, shades-red or brown
Redox depletions: amount-none to common, size-fine to coarse, contrast-faint or distinct boundary-diffuse to clear, shades-brown or gray
Total clay content: 20 to 45 percent
Sand content: 25 to 70 percent
Rock fragments: amount-0 to 10 percent; kind-ironstone; size-gravel
Reaction (pH): very strongly acid to moderately acid (4.5 to 6.0)

BtC horizon:
Hue: 2.5 YR to 10YR
Value: 4 to 6
Chroma: 4 to 8
Texture: fine sandy loam, sandy loam, sandy clay loam, or sandy clay
Total clay content: 10 to 34 percent
Sand content: 53 to 70 percent
Reaction (pH): very strongly acid to moderately acid (4.5 to 6.0)

C horizon (where present):
Hue: 7.5YR to 10YR
Value: 5 to 8
Chroma: 6 to 8
Texture: fine sandy loam, sandy loam, sandy clay loam
Total clay content: 10 to 34 percent
Sand content: 53 to 70 percent
Reaction (pH): extremely acid to neutral (3.5 to 7.3)

COMPETING SERIES: Canton Bend, Gundy, and Skyuka are in the same family.
Canton Bend soils have more than 30 percent silt in the control section.
Gundy soils have a paralithic contact to Carolina slate rock at 102 to 152 cm (40 to 60 in) deep.
Skyuka soils formed in old alluvium washed from uplands dominantly underlain by dark colored high grade metamorphic rocks.

GEOGRAPHIC SETTING:
Parent material: loamy and clayey Tertiary-aged sediments
Landscape: Coastal Plain
Landform: Interfluve
Slope: mainly 1 to 8 percent but ranges from 1 to 12 percent
Mean annual air temperature: 12.1 to 24.7 degrees C (54 to 76 degrees F)
Mean annual precipitation: 1,204 to 1,534 mm (47 to 60 in)
Frost-free period: 230 to 255 days
Elevation: 32.8 to 181.3 m (108 to 595 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are Beauregard, Boswell, Eastwood, Guyton, Latex, Keatchie, Keithville, Malbis, Ruston, Sacul, and Tenaha.
Beauregard soils have plinthite
Boswell soils have vertic properties
Eastwood soils are slightly lower and have vertic properties
Guyton soils are in floodplains
Latex soils have glossic horizons on terraces
Keatchie soils have glossic horizons and has a fine-loamy control section
Keithville soils are wetter and has a fine-silty control section
Malbis soils have plinthite
Ruston soils are on a slightly higher convex ridge with fine-loamy control section
Sacul soils have a seasonally high water table
Tenaha soils are arenic

DRAINAGE AND PERMEABILITY: Hallsummit soils are well drained. Rate of runoff is medium on slopes less than 5 percent, and high on slopes up to 12 percent; permeability is moderately slow.

USE AND VEGETATION: Hallsummit soils are used mainly for woodlands; vegetation is typically shortleaf and loblolly pines, red oak, sweetgum, and other hardwood trees.

DISTRIBUTION AND EXTENT: Southern coastal plain of northwestern Louisiana and eastern Texas. The known extent is moderate.

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

SERIES ESTABLISHED: Red River Parish, Louisiana; 1973. The Hallsummit name is derived from a small community in Red River Parish, Louisiana.

REMARKS: The Hallsummit series was updated in 2002 to specify that it must have a clay tuck within a depth of 152 cm (60 in) and cannot have geologic C materials within a depth of 152 cm (60 in). The Hallsummit series was renamed in 2021. Diagnostic horizons and features in this pedon include:

Ochric epipedon: 0 to 18 cm (0 to 7 in) (A and E horizons)
Argillic horizon: 18 to 185 cm (7 to 73 in) (Bt horizons)

ADDITIONAL DATA: Characterization data from typifying pedon S75LA-17-11 from Louisiana Agricultural Experiment Station Record: LA0001

KSSL data from 97TX419003 and S2006LA017001.

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National Cooperative Soil Survey
U.S.A.