LOCATION SILSBEE TX
Established Series
JKW-KBH-RM
07/2014
SILSBEE SERIES
The Silsbee series consists of very deep, well drained soils. These gently sloping to strongly soils formed in loamy fluviomarine deposits of the Lissie Formation of early to mid Pleistocene age. Slope ranges from 3 to 12 percent. Mean annual temperature is about 19.4 degrees C (67 degrees F), and mean annual precipitation is about 1397 mm (55 in).
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, thermic Typic Paleudults
TYPICAL PEDON: Silsbee loamy fine sand--forest. (Colors are for moist soil unless otherwise stated.)
A--0 to 13 cm (0 to 5 in) ; brown (10YR 5/3) loamy fine sand; moderate medium granular structure; soft, friable; many very fine to coarse roots; many fine and medium pores; very strongly acid; clear smooth boundary. (8 to 15 cm [3 to 6 in] thick)
E--13 to 38 cm (5 to 15 in); 80 percent light yellowish brown (10YR 6/4) and 20 percent pale brown (10YR 6/3) loamy fine sand; moderate medium subangular blocky structure; slightly hard, friable; many very fine to medium and common coarse roots; many fine and common medium pores; very strongly acid; clear smooth boundary. (7 to 45 cm [3 to 18 in] thick)
Bt1--38 to 76 cm (15 to 30 in); yellowish red (5YR 5/8) sandy clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; hard, firm; many fine and medium roots; common very fine and fine pores; 5 percent distinct yellowish red (5YR 4/6) clay films on surfaces of peds; 3 percent ironstone nodules; strongly acid; gradual smooth boundary. (combined thickness of the Bt subhorizons is 140 to 175 cm [55 to 69 in])
Bt2--76 to 125 cm (30 to 49 in); yellowish red (5YR 5/6) sandy clay loam; moderate medium and coarse prismatic structure parting to moderate medium subangular blocky; hard, firm; common very fine and fine roots; common very fine and fine pores; 4 percent faint yellowish red (5YR 4/6) and yellowish red (5YR 5/8) clay films on surfaces of peds; 3 percent fine rounded ironstone nodules; strongly acid; gradual wavy boundary.
Bt3--125 to 147 cm (49 to 58 in); strong brown (7.5YR 5/8) sandy clay loam; weak medium prismatic structure parting to moderate medium subangular blocky; hard, firm; common fine and medium roots; common very fine pores; 2 percent prominent yellowish red (5YR 4/6) clay films and 2 percent distinct yellowish red (5YR 5/8) clay films on surfaces of peds; 2 percent fine rounded ironstone concretions; 1 percent fine rounded red (2.5YR 4/6) plinthite; 2 percent fine prominent red (2.5YR 4/6) iron concentrations with sharp boundaries; strongly acid; gradual wavy boundary.
Bt4--147 to 180 cm (58 to 71 in); strong brown (7.5YR 5/8) sandy clay loam; weak medium prismatic structure parting to moderate medium subangular blocky; hard, firm; common very fine and fine roots; common very fine pores; 5 percent prominent yellowish red (5YR 4/6) clay films and 1 percent distinct yellowish red (5YR 5/8) clay films on surfaces of peds; 3 percent fine red (2.5YR 4/6) plinthite; 2 percent fine prominent red (2.5YR 4/6) iron concentrations with sharp boundaries; strongly acid; gradual wavy boundary.
Bt5--180 to 203 cm (71 to 80 in); strong brown (7.5YR 5/6) sandy clay loam; weak medium prismatic structure parting to moderate medium subangular blocky; hard, firm; common very fine roots; common fine and medium pores; 2 percent distinct strong brown (7.5YR 5/6) clay films on surfaces of peds; 3 percent fine plinthite; 2 percent fine prominent red (2.5YR 4/6) iron concentrations with sharp boundaries; strongly acid.
TYPE LOCATION: Hardin County, Texas; from the intersection of Farm Road 418 and Farm Road 1122 in Silsbee; 0.4 mile northwest on Farm Road 418 to county road; 0.1 mile north and 1.9 mile northwest on county road to forest road; 0.7 mile west on forest road; 75 ft north in forest; Deserter Baygall topographic quadrangle; Latitude: 30 degrees 25 minutes 26 seconds N; Longitude: 94 degrees 14 minutes 34 seconds W. WGS84.
RANGE IN CHARACTERISTICS:
Soil Moisture: An udic soil moisture regime. The soil moisture control section is 10 to 30 cm (4 to 12 in) below the soil surface and remains dry less than 90 cumulative days in most years.
Mean annual soil temperature: 20.6 to 21.7 degrees C (69 to 71 degrees F)
Depth to argillic horizon: 20 to 58 cm (8 to 23 in)
Particle-size control section (weighted average)
Clay content: 26 to 35 percent
Base saturation: 25 to 35 percent
A Horizon
Hue: 10YR
Value: 4 to 6
Chroma: 3 or 4
Texture: loamy fine sand, fine sandy loam, very fine sandy loam
Reaction: very strongly acid or strongly acid
E Horizon
Hue: 10YR
Value: 5 to 7
Chroma: 3 or 4
Texture: loamy fine sand, fine sandy loam, very fine sandy loam
Reaction: very strongly acid to moderately acid
Bt Horizon
(Upper part)
Hue: 2.5YR or 5YR
Value: 4 or 5
Chroma: 6 to 8
Texture: loam, sandy clay loam or clay loam
Reaction: very strongly acid or strongly acid
Bt Horizon
(Lower part)
Hue: 5YR or 7.5YR
Value: 5 to 7
Chroma: 6 to 8
Texture: fine sandy loam, loam or sandy clay loam.
Redox concentrations: amount-0 to 5 percent; color-shades of yellow, brown or red
Plinthite nodules: amount- 0 to 4 percent; color-shades of red
Reaction: extremely acid to strongly acid
COMPETING SERIES: These include the
Addielou (TX),
Allen (TN),
Avilla (AR),
Dubach (LA),
Etowah (TX),
Holston (TN)
Leesburg (AL),
Lytle (LA),
Nella (TN),
Octavia (OK),
Otanya (TX),
Ruston (LA),
Sailes (TX), and
Warnock (AR) series in the same family.
Addielou soils: have an ochric pedon more than 50 cm (20 in) thick and the upper Bt horizons have a yellower hue
Allen soils: formed in alluvium or colluvium derived from sandstone and shale
Avilla soils: have more than 15 percent coarse fragments in the lower Bt
Dubach,
Holston,
Otanya and
Warnock soils: have hue of 7.5YR or yellower throughout
Etowah soils: formed in alluvium or colluvium that is underlain by limestone
Leesburg and
Nella, and
Octavia soils: have sandstone or chert gravels in the Bt horizon
Lytle soils: formed from loess-mantled coastal plain sediments
Ruston soils: are bisequal, with a glossic horizon in the lower part
Sailes soils: formed in Tertiary-aged formations containing glauconitic parent materials
GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits of the Lissie Formation of early to mid-Pleistocene age
Landscape: inland dissected Coastal plain
Landform: interfluves
Slope: 3 to 12 percent
Mean annual air temperature range: 19.5 to 20.6 degrees C (67 to 69 degrees F)
Mean annual precipitation range: 1219 to 1473 mm (48 to 58 in)
Precipitation Pattern: Rainfall is generally uniform throughout the year with slight peaks in the spring and fall.
Frost-free period: 240 to 300 days
Elevation: 22.9 to 46 m (75 to 150 feet)
Thornthwaite P-E index is 68 to 80.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Kirbyville and
Otanya soils. Kirbyville soils are moderately well drained and are on lower landscape positions. Otanya soils have a subsoil yellower than 5YR and are on similar to lower landscape positions.
DRAINAGE AND PERMEABILITY: Silsbee soils are well drained. Runoff is medium on 3 to 5 percent, and high on 5 to 12 percent slopes. Permeability is moderate.
USE AND VEGETATION: Used primarily for woodland and wildlife habitat. Some areas are used for pastureland. Pastures are bahiagrass and improved bermudagrass. Native vegetation is longleaf pine, yaupon, bluestems, panicums and paspalums. The most common commercially grown pine is loblolly.
DISTRIBUTION AND EXTENT: Southeast Texas generally east of the Trinity River; LRR T; MLRA 152B (Western Gulf Coast Flatwoods). The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Hardin County, Texas; 1998.
REMARKS: The Silsbee soils were formerly included with the Otanya and Attoyac series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon:0 to 38 cm (0 to 15 in) (A and E horizons).
Argillic horizon:38 to 203 cm (15 to 80 in) (Bt horizon).
SOIL Interpretation Record Number: TX1337
ADDITIONAL DATA: Texas A&M University Soil Characterization Lab data on sample (S95TX-199-005) from type location in Hardin County, TX.
Taxonomic Version: Keys to Soil Taxonomy, Eleventh Edition, 2010.
National Cooperative Soil Survey
U.S.A.