LOCATION FADDIN                  TX

Established Series
WLM-GLL-SAK-AKS
07/2019

FADDIN SERIES


The Faddin series consists of very deep, moderately well drained, very slowly permeable soils that formed in loamy fluviomarine deposits derived from the Beaumont Formation of Pleistocene age. These nearly level to gently sloping soils are on ancient meander ridges. Slope ranges from 0 to 3 percent. Mean annual precipitation is about 940 mm (37 in) and the mean annual air temperature is about 22.8 degrees C (73 degrees F).

TAXONOMIC CLASS: Fine, smectitic, hyperthermic Vertic Argiudolls

TYPICAL PEDON: Faddin fine sandy loam, on a southeast facing, convex, 0.5 percent slope in rangeland at an elevation of 20.7 m (68 ft). (Colors are for moist soil unless stated.)

A--0 to 41 cm (0 to 16 in); very dark grayish brown (10YR 3/2) very fine sandy loam, grayish brown (10YR 5/2) dry; moderate fine and very fine subangular blocky structure; slightly hard, very friable; many fine and very fine and few medium roots; common very fine and fine pores; slightly acid; abrupt wavy boundary. (Thickness of the A horizon is 20 to 51 cm [8 to 20 in])

Bt1--41 to 61 cm (16 to 24 in); very dark gray (10YR 3/1) clay, gray (10YR 5/1) dry; moderate fine angular blocky structure; extremely hard, very firm; common fine and very fine and few medium roots; few very fine and fine pores; few faint slickensides and pressure faces; few faint clay films on faces of peds; common medium and coarse prominent red (2.5YR 4/6) and few fine and medium distinct strong brown (7.5YR 5/8) masses of oxidized iron with sharp boundaries in matrix; slightly acid; abrupt wavy boundary.

Bt2--61 to 89 cm (24 to 35 in); gray (10YR 6/1) clay, light gray (10YR 7/1) dry; moderate fine angular blocky structure; extremely hard, very firm; common fine and very fine roots; few faint slickensides and pressure faces; common faint clay films on faces of peds; common medium and coarse distinct yellowish brown (10YR 5/6) masses of oxidized iron with sharp boundaries in matrix; neutral; clear wavy boundary.

Bt3--89 to 117 cm (35 to 46 in); grayish brown (10YR 5/2) sandy clay, light brownish gray (10YR 6/2) dry; moderate medium prismatic structure parting to moderate medium and coarse angular blocky; extremely hard, very firm; few fine roots; common distinct clay films along faces of prisms and patchy clay films on faces of some peds; few pitted concretions of calcium carbonate 2 to 5 mm in diameter; few fine black (10YR 2/1) iron-manganese nodules; slight effervescence; moderately alkaline; gradual wavy boundary. (Combined thickness of the Bt horizon is 58 to 145 cm [23 to 57 in])

Btk--117 to 203 cm (46 to 80 in); light yellowish brown (2.5Y 6/4) clay loam, pale yellow (2.5Y 7/4) dry; weak medium and coarse angular blocky structure parting to weak fine and very fine subangular blocky; extremely hard, firm; few fine roots; common faint clay films on faces of some peds; about 30 percent by volume soft powdery masses of calcium carbonate 0.4 to 1 cm across; few pitted concretions of calcium carbonate 0.5 to 8 cm in diameter; few fine black (10YR 2/1) iron-manganese nodules; slight effervescence; moderately alkaline.

TYPE LOCATION: Victoria County, Texas; from the intersection of Loop 175 and U. S. Highway 77 southwest of Victoria, 11.3 miles south on U.S. Highway 77 to Farm Road 445, 1.9 miles east on Farm Road 445, 1.0 mile northeast and north, 0.45 mile east, and 50 feet north in rangeland.

USGS topographic quadrangle: McFaddin, Texas;
Latitude is 28 degrees, 34 minutes, 1 second N;
Longitude is 96 degrees, 59 minutes, 59 seconds W.
Datum: NAD 83.

RANGE IN CHARACTERISTICS: Most pedons have a few dark concretions with amounts increasing with depth.

Soil Moisture: An udic soil moisture regime. The soil moisture control section is moist in some or all parts for more than 275 days in normal years.

Mean annual soil temperature: 22.2 to 23.4 cm (72 to 74 degrees F).
Depth to argillic horizon: 20 to 51 cm (8 to 20 in)
Mollic epipedon: 41 to 76 cm (16 to 30 in) (includes the upper part of the argillic horizon in most pedons)

Particle-size control section (weighted average)
Clay content: 40 to 50 percent

A Horizon
Hue: 10YR
Value: 2 or 3
Chroma: 1 or 2
Texture: fine sandy loam, very fine sandy loam or loam
Clay content: 6 to 20percent
Other features: The contact between the A and Bt horizon is abrupt and wavy causing crests and troughs. Typically, the A horizon is about 41 cm (16 in) thick. It ranges from 20 to 36 cm (8 to 14 in) thick on subsoil crests and 36 to 51 cm (14 to 20 in) thick in subsoil troughs. There is a discontinuous E horizon, 2.5 to 7.5 cm (1 to 3 in) thick in subsoil troughs of some pedons.
Reaction: slightly acid or neutral

Bt Horizon
(Upper part)
Hue: 10YR
Value: 3 to 7
Chroma: 1 or 2
Texture: sandy clay, clay loam, or clay
Clay content: 35 to 57 percent
Redox concentrations: amount-2 to 20 percent; shades-red, yellow, or brown
Identifiable secondary carbonate: amount-0 to 3 percent; kind-concretions, masses or threads
Reaction: strongly acid to neutral

Bt Horizon
(Lower part)
Hue: 10YR
Value: 3 to 5
Chroma: 1 or 2
Texture: sandy clay, clay loam, or clay
Clay content: 20 to 57 percent
Redox concentrations: amount-0 to 10 percent; shades-red, yellow, or brown
Identifiable secondary carbonate: amount-0 to 3 percent; kind-concretions, masses or threads
Effervescence: very slight or slight
Reaction: slightly alkaline or moderately alkaline

Btk Horizon
(This horizon is absent in some pedons.)
Hue: 7.5YR to 2.5Y
Value: 4 to 7
Chroma: 1 or 2
Texture: sandy clay loam, clay loam, or sandy clay
Clay content: 20 to 40 percent
Redox concentrations: amount-0 to 10 percent; shades-red, yellow, or brown
Redox depletions: amount-0 to 2 percent; shades-gray
Identifiable secondary carbonate: amount-0to 35 percent; kind-concretions, masses or threads
Effervescence: very slight or slight
Reaction: slightly alkaline or moderately alkaline

COMPETING SERIES: This is the Dacosta Labelle (series in the same family. Similar soils are the Anahuac, Bernard, Spindletop, and the Texana series.
Dacosta soils: have a sandy clay loam surface texture; a lithologic discontinuity starting at 188 cm (71 in) Anahuac soils: have an umbric epipedon
Bernard soils: have a clay loam surface; are saturated in the upper part for periods of 20 consecutive days or more
Labelle soils: have a silt loam surface texture; are saturated in the upper part for periods of 20 consecutive days or more
within 102 cm (40 in) of the surface
Spindletop soils: are saturated in the upper part for periods of 20 consecutive days or more
Texana soils: have an albic horizon

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits derived from the Beaumont Formation of Pleistocene age
Landscape: flat coastal plain
Landform: relict meanderscrolls
Slope: 0 to 5 percent, but along narrow drainageways ranges to 5 percent.
Precipitation Pattern: Precipitation is uniform throughout the year with slight peaks from May to June and from September to October.
Mean annual precipitation: 762 to 1067 mm (30 to 42 in)
Thornthwaite annual P-E indices: 40 to 52
Mean annual air temperature: 22.2 to 23.9 cm (72 to 75 degrees F)
Frost-free period: 260 to 300 days
Elevation: 7.6 to 46 m (25 to 150 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dacosta (TX), Edna (TX), Fordtran (TX), and Laewest (TX) series.
Dacosta soils: have a sandy clay loam surface and are on coastal plain flats
Edna and Fordtran soils: do not have a mollic epipedon and are on coastal plain dips
Laewest soils: are clayey throughout and are on coastal plain flats

DRAINAGE AND PERMEABILITY:
Drainage class: Moderately well
Permeability class: very slow
Runoff: high on slopes less than 1 percent and very high on slopes of 1 to 5 percent
Seasonal water table: water perched on top of the argillic horizon for periods of a few hours to 3 days following extended heavy rain. During wet years planting may be delayed for short periods.

USE AND VEGETATION:
Major uses: rangeland and a few areas are cropland for growing grain sorghum.
Native vegetation: little bluestem, indiangrass, brownseed paspalum and balsamscale.
Ecological sites assigned to phases and components of this series are listed below. Current ecological site assignments are in Web Soil Survey. Components of this series include the following ecological sites: Loamy Prairie
DISTRIBUTION AND EXTENT:
General area: Upper Gulf Coast of Texas
Land Resource Region: T - (Atlantic and Gulf Coast Lowland Forest and Crop Region)
Major Land Resource Area: 150A - (Gulf Coast Prairies)
Extent: moderate

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

SERIES ESTABLISHED: Victoria County, Texas; l980

REMARKS: The classification is changed from Abruptic Argiaquolls to Aquic Argiudolls based on the "Soil Moisture Study Conducted in Texas and Louisiana (ICOMAQ) 1990." This soil does not have an aquic moisture regime. These soils were formerly mapped in the Bernard or Telferner series. Data from NSSL, Sample Nos., 79PO183-187. The series was reclassified in December 2008 during the correlation of Goliad County from Aquic Argiudolls to Oxyaquic Argiudolls. The classification was changed in 2019 to Vertic Argiudolss due to analysis of soil moisture studies done on similar textured soils.

Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 61 cm (24 in) (A, Bt1 horizons)
Argillic horizons: 41 to 203 cm (16 to 80 in) (Bt1, Bt2, Bt3, Btk)
Secondary Carbonates: 117 to 203 cm (46 to 80 in) (Btk)

ADDITIONAL DATA: NSSL data on pedon 79P0036.

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


National Cooperative Soil Survey
U.S.A.