LOCATION REALITOS TXEstablished Series
TAXONOMIC CLASS: Fine, smectitic, hyperthermic Typic Haplusterts
TYPICAL PEDON: Realitios clay, in a 0.3 percent concave depression in rangeland; elevation is 110 meters (360 feet). (Colors are for dry soil unless otherwise stated.)
A--0 to 15 cm (0 to 6 in); dark gray (10YR 4/1) clay, very dark gray (10YR 3/1) moist; moderate fine and medium subangular blocky and granular structure; extremely hard, very firm, very sticky and very plastic; common fine and medium and few coarse roots; few fine pores; noneffervescent; slightly acid; clear wavy boundary. (13 to 38 cm [5 to 15 in] thick)
Bss1--15 to 69 cm (6 to 27 in); dark gray (10YR 4/1) clay, very dark gray (10YR 3/1) moist; strong fine and medium angular blocky structure; extremely hard, very firm, very sticky and very plastic; common distinct slickensides; common fine and few medium roots; few fine pores; noneffervescent; neutral; gradual wavy boundary.
Bss2--69 to 94 cm (27 to 37 in); gray (10YR 5/1) clay, dark gray (10YR 4/1) moist; strong fine and medium angular blocky structure; extremely hard, very firm, very sticky and very plastic; common distinct slickensides; few fine roots; noneffervescent; neutral; clear wavy boundary.
Bss3--94 to 124 cm (37 to 49 in); gray (10YR 6/1) clay, gray (10YR 5/1) moist; strong fine and medium angular blocky structure; extremely hard, very firm, very sticky, and very plastic; common distinct slickensides and pressure faces; few fine roots; noneffervescent; slightly alkaline; clear wavy boundary. (combined thickness of Bss horizon is 64 to 140 cm [25 to 55 in])
Bkss--124 to 203 cm (49 to 80 in); light brownish gray (10YR 6/2), clay loam, grayish brown (10YR 5/2) moist; weak fine and medium angular blocky structure; extremely hard, very firm, sticky and plastic; few distinct slickensides; 5 percent fine and medium masses of calcium carbonate; matrix is noneffervescent; slightly effervescent; moderately alkaline.
TYPE LOCATION: Duval County, Texas; from the intersection of Texas Highway 359 and Texas Highway 339 in Benavides; 8.6 miles south on Texas Highway 339, 0.7 miles west on private ranch road, 0.8 miles north on field road, 100 feet east in depression. USGS Concepcion NW, Texas topographic quadrangle; Latitude: 27 degrees, 28 minutes, 55 seconds N; Longitude: 98 degrees, 25 minutes, 11 seconds W; NAD83.
RANGE IN CHARACTERISTICS:
Soil Moisture: The soil moisture control section is dry in some or all parts for more than 90 cumulative days in most years during the months of June through August and December through February. The SMCS is also moist for more than 180 cumulative days or more than 90 consecutive days in most years during September through November and March through May. Typic/ustic moisture regime; the SMCS is influenced by runoff water.
Mean annual soil temperature: 22 to 24 degrees C (72 to 75 degrees F)
Depth to slickensides: 13 to 51 cm (5 to 20 in)
Depth to secondary calcium carbonate: 76 to 191 cm (30 to 75 in)
Depth to calcic horizon: 102 to 152 cm (40 to 60 in)
Depth to endosaturation: 51 to 76 cm (20 to 30 in) for one to three weeks following prolonged rains. Reduction occurs in this zone in 2 to 4 years out of 10 years.
Does not have aquic conditions in most years.
Depth to episaturation: 0 to 25 cm (0 to 10 in); the soil has episaturation for brief periods following heavy rains.
Redoximorphic features in the form of concentrations and depletions ranging from none to about 5 percent throughout.
A Horizon
Hue: 10YR or 2.5Y
Value: 2 to 4
Chroma: 1
Texture: clay loam or clay
Clay content: 35 to 45 percent
Coarse fragments: 0 to 2 percent gravel
Base saturation: 90 to 100 percent
EC (dS/m): 0 to 2
Gypsum: 0 to 2 percent
SAR: 0 to 4
Effervescence: none or slight
Reaction: slightly acid to slightly alkaline
Bss or Bw (where present) Horizon
Hue: 10YR or 2.5Y
Value: 3 to 6
Chroma: 1 to 3
Texture: clay
Clay content: 40 to 60 percent
Coarse fragments: 0 to 5 percent gravel
Base saturation: 95 to 100 percent
Calcium carbonate equivalent: 2 to 10 percent
EC (dS/m): 0 to 2
Gypsum: 0 to 6 percent
SAR: 0 to 6
Effervescence: none or slight
Reaction: neutral to moderately alkaline
Bkss Horizon
Hue: 10YR
Value: 4 to 6
Chroma: 1 to 3
Texture: clay loam or clay
Clay content: 35 to 60 percent
Coarse fragments: 0 to 5 gravel
Base saturation: 100 percent
Calcium carbonate equivalent: 15 to 35 percent
Visible calcium carbonate: 5 to 10 percent, fine, thread shaped masses, throughout.
EC (dS/m): 2 to 8
Gypsum: 2 to 6 percent
SAR: 2 to 10
Effervescence: none or slight
Reaction: slightly alkaline or moderately alkaline
BC or BCk Horizon (where present)
Hue: 10YR
Value: 4 to 6
Chroma: 1 to 3
Texture: sandy clay loam, sandy clay or clay loam
Clay content: 30 to 38 percent
Coarse fragments: 0 to 5 gravel
Base saturation: 100 percent
Calcium carbonate equivalent: 0 to 18 percent
Visible calcium carbonate: 0 to 10 percent, fine, thread shaped masses, throughout.
EC (dS/m): 2 to 8
Gypsum: 2 to 6 percent
SAR: 2 to 10
Effervescence: none or slight
Reaction: slightly alkaline or moderately alkaline
COMPETING SERIES: These are the
Buchel(TX),
Danjer(TX),
Monteola(TX),
Rosenbrock(TX), and
Tordia(TX) series. Similar soils are the
Edroy(TX) and
Tiocano(TX) series.
Buchel soils: are in floodplains and do not have a calcic horizon
Danjer soils: are on interfluves and do not have a calcic horizon
Monteola soils: do not have a calcic horizon and is calcareous to the surface.
Rosenbrock soils: do not have a calcic horizon and has a paralithic contact with siltstone between 102 and 152 cm (40 and 60 in) of the surface.
Tordia soils: has a paralithic contact with shale between 102 to 152 cm (40 and 60 in) of the surface.
Edroy soils: are ponded in normal years for long periods of time and have aquic conditions within 51 cm (20 in) of the surface.
Tiocano soils: do not have a calcic horizon, and is moist in the SMCS for longer periods of time.
GEOGRAPHIC SETTING:
Parent material: clayey over loamy alluvium derived from the Goliad Formation.
Landscape: inland, dissected coastal plains
Landform: enclosed depressions
Slope: 0 to 1 percent
Mean annual temperature: 21 to 23 degrees C (70 to 73 degrees F)
Mean annual precipitation: 559 to 813 mm (22 to 32 in)
Frost-free period: 270 to 320 days
Elevation: 76 to 213 m (250 to 700 ft)
Thornthwaite P-E index: 28 to 35
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Coy,
Pernitas,
Tiocano, and
Weesatche series.
Coy series: occur in higher positions, are calcareous throughout, and have argillic horizons.
Pernitas and Weesatche soils: are on summit and shoulder positions on paleoterraces, and have argillic horizons.
Tiocano series: on similar positions in the landscape.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Very slowly permeable. Runoff is negligible. The soil is ponded after heavy rains for very brief to brief duration.
USE AND VEGETATION: Used mainly for livestock grazing and wildlife habitat. Native woody vegetation consists of mesquite, prickly pear, huisache, retama, and spiny hackberry. Grass species consist of hartweg paspalum, buffalograss, swithchgrass, white tridens, and bermudagrass. The ecological site is Lakebed, PE 19-44 (R083CY461TX).
DISTRIBUTION AND EXTENT: Lower Rio Grande Plain of Texas; LRR I; MLRA 83C; minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Duval County, Texas, 1998. The name is from a community in the area near the type location.
REMARKS: The series was formerly included in the Tiocano series.
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: The zone from 25 to 102 cm (10 to 40 in). (A and parts of the Bss horizon)
Mollic epipedon: 0 to 69 cm (0 to 27 in) (A and Bss1 horizons)
Cambic horizon: 69 to 124 cm (27 to 49 in)(Bss2 and Bss3 horizons)
Calcic horizon: 124 to 203 cm (49 to 80 in) (Bkss horizon)
Vertic features: The presence of slickensides at 15 to 203 cm (6 to 80 in) (Bss and Bkss horizons)
Endosaturation: The zone of saturation at 69 to 124 cm (27 to 49 in) in some years. (Bss horizons)
Episaturation: The zone of saturation at 0 to 15 cm (0 to 6 in). (A horizon)
ADDITIONAL DATA: Characterization data from Texas A&M for 1 pedon (S01TX131-002). Particle-size analysis was performed at the local project office for 4 pedon from Duval County.
TAXONOMIC VERSION: Keys to Soil Taxonomy, Tenth edition, 2006.