LOCATION DALLARDSVILLE           TX

Established Series
JKW-CLN-RM
07/2014

DALLARDSVILLE SERIES

The Dallardsville series consists of very deep, moderately well drained soils. These nearly level soils are on mounds that formed in loamy fluviomarine deposits derived from the Lissie Formation of early Pleistocene age. Slope ranges from 0 to 1 percent. Mean annual temperature is about 20 degrees C (68 degrees F), and mean annual precipitation is about 1321 mm (52 in).

TAXONOMIC CLASS: Coarse-loamy, siliceous, semiactive, thermic Oxyaquic Paleudults

TYPICAL PEDON: Dallardsville very fine sandy loam--forest in complex with Sorter; elevation is 34 m (111 ft)(Colors are for moist soil unless otherwise stated.)

A--0 to 18 cm, (0 to 7 in); yellowish brown (10YR 5/4) very fine sandy loam; weak medium subangular blocky structure; slightly hard, very friable; many very fine to coarse roots; many fine pores and medium pores; common masses of grayish brown (10YR 5/2) very fine sandy loam; few worm casts; 2 percent fine and medium rounded ironstone nodules; extremely acid; clear smooth boundary. (8 to 25 cm [3 to 10 in] thick)

E--18 to 53 cm, (7 to 21 in); pink (7.5YR 7/3) very fine sandy loam; weak coarse subangular blocky structure; slightly hard, very friable; many very fine to coarse; many fine and medium pores; few worm casts; 2 percent fine rounded ironstone nodules; 4 percent fine distinct reddish yellow (7.5YR 6/8) iron concentrations with sharp boundaries; extremely acid; clear smooth boundary. (28 to 51 cm [11 to 20 in] thick)

E/Btl--53 to 79 cm, (21 to 31 in); 65 percent pink (7.5YR 7/3) very fine sandy loam (E); 35 percent reddish yellow (7.5YR 6/8) (Bt); weak coarse prismatic structure parting to weak medium subangular blocky; hard, friable; many very fine, fine and common medium roots; many fine and medium pores; few faint reddish yellow (7.5YR 6/6) clay films on surfaces of peds and in pores in Bt part; few worm casts; 2 percent fine rounded ironstone nodules; 3 percent fine and medium distinct reddish yellow (7.5YR 6/6) and 2 percent fine prominent brownish yellow (10YR 6/8) iron concentrations with sharp boundaries between peds; extremely acid; clear irregular boundary.

E/Bt2--79 to 97 cm, (31 to 38 in); 55 percent pink (7.5YR 7/3), very fine sandy loam; 45 percent reddish yellow (7.5YR 6/6) (Bt); weak medium prismatic structure parting to weak fine and medium angular blocky; hard, friable; common very fine roots between peds; many fine and medium pores; few faint reddish yellow (7.5YR 6/8) clay films on surfaces of peds and in pores in Bt part; 4 percent fine rounded ironstone nodules; 7 percent fine and medium prominent reddish yellow (7.5YR 6/8) and reddish yellow (5YR 6/8) iron concentrations with clear boundaries between peds in Bt part; 1 percent fine distinct light gray (10YR 7/2) iron depletions in the E part; extremely acid; clear smooth boundary. (Combined thickness of the E/Bt subhorizons is 22 to 53 cm [9 to 21 in] thick)

Bt/E--97 to 119 cm, (38 to 47 in); 70 percent light yellowish brown (10YR 6/4), very fine sandy loam (Bt); 30 percent pink (7.5YR 7/3) (E); weak medium prismatic structure parting to weak fine and medium angular blocky; hard, firm; common very fine and fine roots between peds; common fine and medium pores; few distinct brownish yellow (10YR 6/6) clay films on surfaces of peds and in pores; 3 percent fine rounded ironstone nodules; 3 percent medium prominent red (2.5YR 4/8) iron concentrations with sharp boundaries; 4 percent fine and medium prominent yellowish red (5YR 5/8) iron concentrations with clear boundaries on surfaces of peds and in pores; 7 percent fine and medium distinct yellow (10YR 7/8) iron concentrations with diffuse boundaries on surfaces of peds in Bt part; 1 percent fine faint light gray (10YR 7/2) clay depletions in the E part; 20 percent slightly brittle material 2.5 to 8 cm (1 to 3 in) wide; very strongly acid; gradual wavy boundary. (13 to 43 [5 to 17 in] thick)

Bt/Eg--119 to 155 cm, (47 to 61 in); 85 percent brownish yellow (10YR 6/6) very fine sandy loam (Bt); 15 percent light gray (10YR 7/1) (Eg); weak coarse prismatic structure parting to moderate fine and medium angular blocky; very hard, very firm; common very fine roots between peds; many fine and medium and common coarse pores; few distinct reddish yellow (7.5YR 6/6) clay films on surfaces of peds and in pores; 2 percent fine red (2.5YR 4/8) plinthite; 5 percent medium prominent red (2.5YR 4/8) iron concentrations with abrupt boundaries on surfaces of peds; 3 percent medium prominent reddish yellow (5YR 6/8) iron concentrations with clear boundaries on surfaces of peds and in pores; 2 percent fine faint yellow (2.5Y 7/6) iron concentrations with diffuse boundaries on surfaces of peds in Bt part; the E portion of this horizon consists of albic material that is 0.3 to 1.3 cm (1/8 to 1/2 in) wide on surfaces of prisms and is a clay depletion resulting from aquic conditions; 35 percent is brittle material 2.5 to 13 cm (1 to 5 in) wide; very strongly acid; gradual wavy boundary. (Combined thickness of the Bt/E subhorizons is 43 to 89 cm [17 to 35 in] thick)

Btx/Egl--155 to 191 cm, (61 to 75 in); 80 percent brownish yellow (10YR 6/6) very fine sandy loam (Btx); 20 percent light gray (10YR 7/1) (Eg); moderate coarse prismatic structure parting to moderate medium and coarse angular blocky; very hard, very firm; common very fine roots in nonbrittle material; many fine and medium and common coarse pores; few distinct reddish yellow (7.5YR 6/6) clay films on surfaces of peds and in pores; 3 percent fine red (2.5YR 4/8) plinthite; 2 percent fine prominent red (2.5YR 4/6) iron concentrations with abrupt boundaries; 8 percent medium prominent strong brown (7.5YR 5/8) iron concentrations with clear boundaries; 2 percent fine faint brownish yellow (10YR 6/8) iron concentrations with diffuse boundaries on surfaces of peds; the Eg portion of this horizon consists of albic material 0.5 to 5 cm (1/8 to 2 in) wide on surface of prisms and is a clay depletion resulting from aquic conditions; 60 percent is brittle; very strongly acid; gradual wavy boundary. (Combined thickness of the Btx/E subhorizons is 38 to 76 cm [15 to 30 in] thick)

Btx/Eg2--191 to 203 cm, (75 to 80 in); 70 percent reddish yellow (7.5YR 6/8) very fine sandy loam (Btx); 30 percent light gray (10YR 7/1) (Eg); moderate very coarse prismatic structure parting to moderate coarse angular blocky; very hard, very firm; many fine to coarse pores; few distinct brownish yellow (10YR 6/8) clay films on surfaces of peds; 5 percent medium prominent yellowish red (5YR 5/8) iron concentrations on surfaces of peds; the E portion of this horizon consists of albic material 0.20 to 2.5 cm (1/16 to 1 in) wide on surfaces of prisms with 5 percent fine faint very pale brown (10YR 8/2) and few fine prominent bluish gray (5B 6/1) iron depletions with clear boundaries in interior of E part; the E is a clay depletion resulting from aquic conditions; 65 percent of the horizon is brittle to very brittle; very strongly acid.

TYPE LOCATION: Hardin County, Texas; from the intersection of Texas Farm Road 92 and Texas Farm Road 1122 in Silsbee; 4.3 miles north on Texas Farm Road 92 to Gore Store Road; 2.75 west on Gore Store Road to county road; 0.85 mile north on county road, and 0.5 mile east on county road to forest road; 0.3 mile south and 0.7 mile east on forest road; 300 ft northwest on pipeline; 250 ft west of pipeline in forest. Latitude: 30 degrees, 29 minutes, 05 second N; Longitude: 94 degrees, 12 minutes, 31 seconds W; Deserter Baygall topographic quadrangle; NAD 83.

RANGE IN CHARACTERISTICS:
Soil Moisture: An udic soil moisture regime. The soil moisture control section is 20 to 60 cm (8 to 24 in) below the soil surface, which remains moist in some or all parts from more than 90 cumulative days in normal years.
Mean annual soil temperature: 20.6 to 21.7 (69 to 71 degrees F)
Depth to argillic horizon: 69 to 97 cm (27 to 38 in)
Depth to glossic horizon: 61 to 89 cm (24 to 36 in)
Depth to redox concentrations: 23 to 46 cm (9 to 18 in)
Depth to redox depletions: 46 to 86 cm (18 to 34 in)
Depth to fragipan: 127 to 165 cm (50 to 65 in)
Reaction ranges from extremely acid to strongly acid throughout.

Particle-size control section (weighted average)
Clay content: 10 to 18 percent.
Base saturation: 15 to 25 percent.
CEC to clay ratio: 0.30 to 0.40.

A horizon
Hue: 10YR
Value: 3 to 5
Chroma: 2 to 4
Texture: very fine sandy loam, fine sandy loam, silt loam

E horizon
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 3 or 4
Texture: very fine sandy loam, fine sandy loam, silt loam
Iron concentrations: amount-0 to 8 percent, color-shades of brown or yellow
Iron depletions: amount-0 to 1 percent, color-shades of gray

E/Bt horizon
Part: E
Hue: 7.5YR or 10YR
Value: 6 or 7
Chroma: 3 or 4
Part: Bt
Hue: 7.5YR or 10YR
Value: 6 or 8
Texture: very fine sandy loam, fine sandy loam, silt loam
Iron concentrations: amount-5 to 25 percent; color-shades of brown or yellow
Iron depletions: amount-0 to 2 percent; color-shades of gray; located mostly in the E.

Bt/E horizon
Part: Bt
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 4 to 8
Part: E
Hue: 7.5YR or 10YR
Value: 7 or 8
Chroma: 3 or 4
Texture: very fine sandy loam, fine sandy loam, silt loam, loam
Iron concentrations: amount-5 to 25 percent; color-shades of brown, red, or yellow; located mostly in the Bt.
Iron depletions: amount-0 to 2 percent; color- shades of gray, green, or gray; boundary-located mostly in the E part.
Plinthite: 0 to 3 percent
Brittle material: 20 to 45 percent

Bt/Eg horizon
Part: Bt
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 4 to 8
Part: Eg
Hue: 7.5YR or 10YR
Value: 7 or 8
Chroma: 1 or 2
Texture: very fine sandy loam, fine sandy loam, loam
Iron concentrations: amount-10 to 25 percent; color shades of brown, red, or yellow; located mostly in the Bt.
Iron depletions: amount-1 to 5 percent; color-shades of blue, green, or gray; located mostly in the E.
Plinthite: 0 to 3 percent
Brittle material: 20 to 45 percent

Btx/Eg horizon
Part: Bt
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 4 to 8
Part: Eg
Hue: 7.5YR or 10YR
Value: 7 or 8
Chroma: 1 or 2
Texture: very fine sandy loam, fine sandy loam, loam, sandy clay loam, or silt loam
Iron concentrations: amount-10 to 25 percent; color-shades of brown, red, or yellow; located mostly in the Bt part.
Iron depletions: amount-1 to 5 percent; color-shades of blue, green, or gray; located mostly in the E part.
Plinthite: 0 to 3 percent
Brittle material: 60 to 85 percent

COMPETING SERIES: There are no series in the same family. Similar soils are Brogdon (SC), Compass (FL), Gist (TX), Kountze (TX), Perdido (FL), and Poarch (AL) series.
Brogdon and Compass soils: sandy surface layer; Brogdon soils have a bisequal pedon. Compass soils have a lithologic discontinuity.
Gist soils: have less than 15 percent sands larger than very fine sand in the particle-size control section
Kountze soils: do not have a fragipan; active CEC to clay class
Perdido soils: subactive CEC to clay class; do not have a glossic horizon.
Poarch soils: a semiactive CEC to clay class; do not have a glossic horizon.

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits of the Lissie Formation of Pleistocene age
Landform: coastal plains on oblong mounds 0.6 to 1.5 m (2 to 5 ft) higher than the surrounding inter-mound; mounds are 9.1 to 30 m (30 to 100 ft wide and 9.1 to 122 m (30 to 400 ft) long.
Slope: 0 to 1 percent
Mean annual air temperature: 19.5 to 20.6 degrees C (67 to 69 degrees F).
Mean annual precipitation: 1219 to 1473 mm (48 to 58 in)
Precipitation pattern: uniform throughout the year with slight peaks in the spring and summer
Frost-free period: 240 to 300 days
Elevation: 22.9 to 46 m (75 to 150 ft)
Thornthwaite annual P-E indices: 68 to 80

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kirbyville (TX), Otanya (TX), Plank (TX), Sorter (TX), Splendora (TX), and Waller (TX) series.
Kirbyville, Otanya, Splendora, and Waller soils: fine-loamy particle-size control section. Kirbyville, Otanya, and Splendora soils are on a higher landform
Plank and Sorter soils: Vermaqualfs and are on a lower landform

DRAINAGE AND PERMEABILITY: Moderately well drained. Permeability is slow. Runoff is negligible. A perched water table is at a depth of 91 to 122 cm (36 to 48 in) from December to March.

USE AND VEGETATION: Used primarily for timber production and wildlife habitat. The main trees are loblolly pine, shortleaf pine, longleaf pine, water oak, willow oak, southern red oak, and sweetgum. Understory includes yaupon, southern bayberry, pinehill bluestem, longleaf uniola, and sedges.

DISTRIBUTION AND EXTENT: Southeast Texas; LRR-T; MLRA-152B (Western Gulf Coast Flatwoods); moderate extent.

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

SERIES ESTABLISHED: Polk County, Texas; 1983.

REMARKS: The type location was moved from Polk County to Hardin County in 1997. The geographic setting was changed from a convex ridge to a mound to reflect the majority of the series province. The series classification was changed from Plinthic Paleudults to Oxyaquic Paleudults 10/1999. The series was updted in July 2011 during the update of MLRA 152B.

Diagnostic horizons and features in this pedons are:
Ochric epipedon--0 to 18 cm (0 to 7 in) (A horizon)
Argillic horizon--97 to 203 cm (38 to 80 in) (Bt/E, Bt/Eg, and Btx/Eg horizons)
Fragipan--155 to 203 cm (61 to 80 in) (Btx/Eg horizons)
Glossic horizon--53 to 203 cm (21 to 80 in) (E/Bt, Bt/Eg, Btx/Eg. The glossic horizon is series criteria but not diagnostic for classification.)

ADDITIONAL DATA: Data from Texas A&M University Soil Characterization Lab on samples (S95TX-199-002 and S96TX-199-009). Soil moisture data from type location in Hardin County, Texas.

Taxonomic Version: Keys to Soil Taxonomy, Eleventh Edition, 2010.

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National Cooperative Soil Survey
U.S.A.