LOCATION TORDIA TX

Established Series
Rev. ACT/ELG/CKH
11/2010

TORDIA SERIES

The Tordia series consists of soils that are deep to weathered mudstone and
Sandstone from sediments like the Jackson Group. They are well drained, very slowly permeable soils that formed in clayey material over materials weathered from mudstone and sandstone containing volcanic ash and shards. These nearly level to moderately sloping soils are on side slopes, shoulders and summits of broad interfluves. Slopes range from 0 to 8 percent.

TAXONOMIC CLASS: Fine, smectitic, hyperthermic Typic Haplusterts

TYPICAL PEDON: Tordia clay--pastureland; elevation is 116 m (381 ft). (Colors are for dry soil unless otherwise stated)

A--0 to 10 cm (0 to 4 in); very dark gray (10YR 3/1) clay, black (10YR 2/1) moist; strong, very fine and fine subangular blocky structure; very hard, very firm; many fine and medium roots; few uncoated sand grains on faces of peds; slightly alkaline; clear wavy boundary. (5 to 41 cm [2 to 16 in} thick)

Bss1--10 to 76 cm (4 to 30 in); very dark gray (10YR 3/1) clay, black (10YR 2/1) moist; moderate fine and medium angular blocky structure; extremely hard, extremely firm; common fine and medium roots; few fine pores; few cracks 1/2 inch wide; few slickensides; few uncoated sand grains on surfaces of peds; moderately alkaline; diffuse wavy boundary. (13 to 76 cm [5 to 30 in] thick)

Bss2--76 to 97 cm (30 to 38 in); dark gray (10YR 4/1) clay, very dark gray (10YR 3/1) moist; moderate fine and medium angular blocky structure; extremely hard, extremely firm; common fine roots; few fine pores; few distinct slickensides; few pressure faces; few uncoated sand grains on surfaces of peds; moderately alkaline; gradual wavy boundary. (8 to 30 cm [3 to 12 in] thick)

BC--97 to 112 cm (38 to 44 in); mottled grayish brown (10YR 5/2) and dark gray (10YR 4/1) clay; dark grayish brown (10YR 4/2) and very dark gray (10YR 3/1) moist; moderate very fine angular blocky structure; extremely hard, extremely firm; few fine roots; few fine pores; few pressure faces; few uncoated sand grains on surfaces of peds; few fine concretions of calcium carbonate; moderately alkaline; gradual wavy boundary. (10 to 30 cm [4 to 12 in] thick)

2Cd--112 to 152 cm (44 to 60 in); light brownish gray (10YR 6/2) weakly consolidated mudstone that has silty clay texture that fractures conchoidally, grayish brown (10YR 5/2) moist; few lenses of sand in horizon; few cracks filled with soil from above; few very fine and fine concretions of calcium carbonate; moderately alkaline.

TYPE LOCATION: Wilson County, Texas; From the intersection of U. S. Highway 181 and Farm Road 541 in Poth; 7 miles west on Farm Road 541; 5.4 miles south of DeWees on Farm Road 1344; east of road in small triangular-shaped pasture.

RANGE IN CHARACTERISTICS:

Soil Moisture: A typic ustic moisture regime. The soil moisture control section is dry in some or all parts for more than 90 days but less than 180 cumulative days in normal years. June through August and December through February are the driest months. These soils are intermittently moist in September through November and March through May.
Solum thickness: 100 to 160 cm (40 to 60 in)
Vertic features: Cracks 3 to 5 cm (1 to 2 in) wide at the surface extend to the Cr
horizon and are more than 1 cm (1/4 in) wide at depths of 50 cm (20 in).
Clay content: 40 to 60

A horizons
Hue: 10YR
Value: 2 to 4
Chroma: 1
Texture: clay loam or clay
Clay content: 32 to 45
Reaction: slightly alkaline to moderately akaline
EC (ds/m): 0 to 2
SAR: 0 to 2

Bw horizon (when present)
Hue: 10YR
Value: 2 or 3
Chroma: 1
Texture: clay loam or clay
Clay content: 35 to 65 percent
Reaction: slightly alkaline to moderately alkaline
EC (ds/m):0 to 3
SAR: 0 to 4

Bss horizon
Hue: 10YR
Value: 2 to 6
Chroma: 1 or 2
Texture: clay loam or clay
Clay content: 38 to 61 percent
Calcium carbonate: 0 to 40 percent
Ped void features: cracks in the Bw horizon are filled with darker material similar to the A horizon. Slickensides ranges from
few to common.
EC (ds/m): 0 to 6
SAR: 2 to 10
Gypsum: Crystals, concretions, and powdery masses 0-20 percent

BC horizon
Hue: 10YR
Value: 4 to 7
Chroma: 1 to 4
Texture: clay
Clay content: 40 to 55
Calcuim carbonate:
Gypsum: 1 to 5
EC (ds/m): 4 to 16
SAR: 8 to 13

BCk,BCkz, or BCkyz horizon (when present)
Hue: 10YR or 2.5Y
Value: 4 to 7
Chroma: 1 to 4
Texture: clay or silty clay
Clay content: 40 to 55
Calcuim carbonate:
Gypsum: 1 to 5
EC (ds/m): 4 to 16
SAR: 5 to 30

Cd horizon
Hue: 10YR to 2.5Y
Value: 5 to 8
Chroma: 1 to 4
Texture: silty clay or clay
Clay content: 40 to 60 percent
Cracks: Less than 10 cm apart
Reaction: neutral to moderately alkaline
Effervescence: none to violent

Vertic properties: darker streaks, usually from old root channels filled
with materials from the A1 and Bw horizons

COMPETING SERIES: These are the Buchel (TX), Danjer (TX), Lattas (TX), Monteola (TX), and
Rosenbrock (TX) series. Similar soils include Coy (TX), Dosrios (TX), Eloso (TX), and Esseville (TX) series.
The Buchel, Danjer, Lattas, and Monteola soils: are very deep soils
Rosenbrock soils: are calcareous in the solum.
Coy soils: have an argillic horizon.
Eloso soils: are moderaltely deep to paralithic contact

GEOGRAPHIC SETTING:
Parent material: clayey alluvium over residuum weathered from weakly consolidated mudstone, or sandstone that contains volcanic ash and shards
Landform: broad interfluves
Slope: 1 to 5 percent
Mean annual temperature: 21 to 23 degrees C(69 to 73 degrees F)
Mean annual precipitation: 660 to 860 mm (26 to 34 in)
Frost-free period: 270 to 285 days
Elevation: 200 to 500 feet
Thornthwaite annual P-E indices: 38 to 42

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coy, Dosrios, Esseville, Fashing (TX), Monteola and Weigang (TX) series. Coy soils: are at slightly lower elevations and they have Bt horizons. Dosrios and Monteola soils: are very deep soils on similar surfaces.Esseville soils: are moderately deep to densic materials and have a gypsic horizon within 100 cmFashing and Weigang soils: are at higher elevations and are shallow to densic or paralithic contact.

DRAINAGE AND PERMEABILITY: Well drained. Permeability is very slow. Runoff is
low on 0 to 1 percent slopes, medium on 1 to 3 percent slopes, high on 3 to 5
percent slopes, and very high on 5 to 8 percent slopes. Water enters the soil
rapidly when it is dry and cracked, and very slowly when it is moist.

USE AND VEGETATION: Areas are used for cropland, pastureland and rangeland.
Cultivated crops are mostly corn, grain sorghums, cotton, and wheat. Range
consists of Texas cupgrass, plains bristlegrass, plains lovegrass trichloris,
sideoats grama, vine-mesquite, mesquite, agarita, and cacti, plus annual weeds
and grasses. Pasture is mainly coastal bermudagrass. The ecological site is Rolling Blackland 18-25 PZ(RO83A***)

DISTRIBUTION AND EXTENT: Northern Rio Grande Plain of Texas (MLRA 83A). The series is of moderate extent.

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

SERIES ESTABLISHED: Wilson County, Texas; 1972.

REMARKS: The Tordia series was formerly included in the Monteola and Orelia
series.

Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - 0 to 97 cm (0 to 38 in). (A and Bss
horizons)

Cambic horizon - 97 to 112 cm (38 to 44 in) (Bss and BC horizons).

Vertic feature: cracks when dry are up to 1 inch wide and extend to more than
51 cm (20 in) in depth and slickensides in the Bss1 and Bss2 horizons.

Densic material: 112 to 152 cm (44 to 60 in). Slakes in water and has cracks less than 10 cm (4 in) apart

ADDITIONAL DATA: Local lab data

SOIL INTERPRETATION RECORD NUMBER: TX0079
TAXONOMIC VERSION: Keys to Soil Taxonomy, Tenth Edition, 2006.

National Cooperative Soil Survey
U.S.A.