LOCATION MIGUEL                  TX

Established Series
Rev. MLG-ACT
11/2016

MIGUEL SERIES

The Miguel series consists of very deep, well drained, slowly permeable soils that formed in loamy and/or clayey residuum weathered from sandstone and/or mudstone of Tertiary age. The soils occur on nearly level to moderately sloping, plane to convex low hills on inland, dissected coastal plains. Slope ranges from 0 to 8 percent. Mean annual precipitation is about 737 mm (29 in), and mean annual air temperature is about 22 degrees C (72 degrees F).

TAXONOMIC CLASS: Fine, mixed, active, hyperthermic Typic Paleustalfs

TYPICAL PEDON: Miguel fine sandy loam in rangeland at an elevation of 67 m (220 ft).
(Colors are for dry soil unless otherwise stated)

A--0 to 25 cm (0 to 10 inches); grayish brown (10YR 5/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; moderate coarse prismatic structure parting to weak fine granular; very hard, friable; many fine roots, few insect tunnels, slightly acid; abrupt smooth boundary. Thickness is 15 to 51 cm (6 to 20 in)

Bt1--25 to 33 cm (10 to 13 in); brown (10YR 5/3) sandy clay, brown (10YR 4/3) moist, with common medium, distinct reddish brown (5YR 5/4) masses of iron accumulation; compound strong medium prismatic and moderate medium angular blocky structure; extremely hard, firm, sticky and plastic; many fine roots; few fine pores; dark coatings on surfaces of prisms; common thick continuous clay films on surfaces of peds; neutral; clear smooth boundary.

Bt2--33 to 74 cm (13 to 29 in); brown (7.5YR 5/4) sandy clay, brown (7.5YR 4/4) moist; many fine faint yellowish red masses of iron accumulation; moderate medium prismatic structure parting to moderate fine and medium angular blocky; very hard, very firm; plastic and sticky; few fine roots between peds; few fine pores; common thick continuous clay films on surfaces of peds; neutral; gradual smooth boundary.

Bt3--74 to 84 cm (29 to 33 in); reddish yellow (7.5YR 6/6) sandy clay, strong brown (7.5YR 5/6) moist; weak coarse prismatic structure parting to fine subangular blocky; very hard, very firm; sticky and plastic; few continuous clay films on surfaces of peds; few fine weakly cemented calcium carbonate concretions; moderately alkaline; gradual wavy boundary. Combined thickness of Bt horizons is 38 to 114 cm (15 to 45 in)

Btk--84 to 114 cm (33 to 45 in); reddish yellow (7.5YR 6/6) sandy clay loam, strong brown (7.5YR 5/6) moist; weak coarse prismatic structure; very hard, friable, sticky and plastic; few thin patchy clay films on surfaces of peds and in pores; 3 percent weakly cemented calcium carbonate concretions; slightly effervescent; moderately alkaline; gradual wavy boundary. Thickness is 0 to 51 cm (0 to 20 in)

BC--114 to 152 cm (45 to 60 in); pink (7.5YR 7/4) sandy clay loam, light brown (7.5YR 6/4) moist; weak coarse subangular blocky structure; hard, friable; slightly effervescent; moderately alkaline.

TYPE LOCATION: Jim Wells County, Texas; From the intersection of U. S. Highway 281 and Texas Highway 44 in Alice; 6.25 miles south on U. S. Highway 281; 1.7 miles west on Farm Market Road 625; 1/2 mile north and 1/2 mile northwest on ranch road, and 50 feet south of road in native rangeland.
USGS topographic quadrangle: Alice South;
Latitude: 27 degrees, 41 minutes, 58.68 seconds N;
Longitude: 98 degrees, 6 minutes, 43.57 seconds W;
Datum: WGS84

RANGE IN CHARACTERISTICS:
Soil Moisture: Typic Ustic soil moisture regime
Solum thickness: 152 to more than 203 cm (60 to more than 80 in)
Depth to secondary carbonates: 71 to 102 cm (28 to 40 in)

Particle-size control section (weighted average)
Clay content: 35 to 50 percent

A Horizon:
Hue: 5YR to 10YR
Value: 4 or 5
Chroma: 2 to 4
Texture: fine sandy loam, very fine sandy loam
Clay content: 8 to 20 percent
Coarse fragments: 0 to 5 percent by volume, sandstone gravel
Effervescence: None
Reaction (pH): slightly acid to neutral (6.1 - 7.3)

Bt Horizon(s):
Hue: 5YR to 10YR
Value: 4 to 6
Chroma: 2 to 6
Texture: sandy clay, clay
Clay content: 35 to 50 percent
Coarse fragments: 0 to 5 percent by volume, sandstone gravel
Redox concentrations: common or many, fine or medium in shades of brown, red, or yellow
Effervescence: None, but may be slight in the lower part
Reaction (pH): neutral to slightly alkaline (6.6 - 7.8)

Btk or Bk Horizon(s):
Hue: 10YR to 5YR
Value: 5 or 6
Chroma: 4 to 8
Texture: sandy clay loam, sandy clay
Clay content: 30 to 45 percent
Coarse fragments: 0 to 10 percent by volume, sandstone gravel
Identifiable secondary carbonate: 2 to 10 percent by volume, masses and weakly cemented concretions
Effervescence: Slight to strong
Reaction (pH): slightly alkaline to moderately alkaline (7.4 - 8.4)

BC Horizon:
Hue: 5YR to 10YR
Value: 5 to 7
Chroma: 2 to 8
Texture: sandy clay loam, sandy clay
Clay content: 20 to 40 percent
Coarse fragments: 0 to 10 percent by volume, sandstone gravel
Effervescence: Very slight to strong
Reaction (pH): slightly alkaline to moderately alkaline (7.4 - 8.4)

C Horizon (where present):
Hue: 5YR to 10YR
Value: 5 to 7
Chroma: 2 to 8
Texture: sandy clay loam, sandy clay
Clay content: 20 to 40 percent
Reaction (pH): slightly alkaline to moderately alkaline (7.4 - 8.4)

COMPETING SERIES: These are the Floresville and Wilco series in the same family. Similar soils are the Delfina, Gillette, Griter, Orelia, and Papalote series.
Delfina and Orelia soils: have a fine-loamy particle-size control section
Floresville soils: do not have redox concentrations
Gillette and Griter soils: are less than 152 cm (60 in) deep to sandstone
Papalote soils: have smectitic mineralogy and redox depletions
Wilco soils: do not have carbonates within 102 cm (40 in) of the surface and have sandy A horizons

GEOGRAPHIC SETTING:
Parent material: loamy and/or clayey residuum derived from noncemented sandstone and/or mudstone of Tertiary age
Landscape: inland, dissected coastal plains
Landform: linear to convex low hills
Slope: 0 to 8 percent, dominantly less than 3 percent
Mean annual precipitation: 635 to 889 mm (25 to 35 in)
Thornthwaite P-E indices: 31 to about 44
Mean annual air temperatures: 21.1 to 22.8 degrees C (70 to 73 degrees F)
Frost free days: from 270 to 305
Elevation: 15.2 to 259.1 m (50 to 850 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Clareville, Delfina, Edroy, and Orelia series.
Clareville soils: have a mollic epipedon and occur in lower drainageways
Edroy soils: do not contain an argillic horizon and occur in lower depressions
Delfina soils: contain 18 to 35 percent clay in the particle-size control section and occur on similar positions
Orelia soils: occur on lower positions and contain 18 to 35 percent clay in the particle-size control section

DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderately slow to slow. Runoff is low to medium on 0 to 1 percent slopes, medium to high on 1 to 5 percent slopes and high on 5 to 8 percent slopes.

USE AND VEGETATION: Used mainly for rangeland and improved pastures, but some areas are cultivated to cotton, grain sorghum, peanuts, and flax. Native vegetation consists of little bluestem, feathery bluestem, Nash and hooded windmillgrass, Texas and plains bristlegrass. Invaders are mainly woody; they are mesquite trees, spiny hackberry, colima, and pricklypear.

DISTRIBUTION AND EXTENT: Land Resource Region I, Southwest Plateaus and Plains Range and Cotton Region; MLRA 83A, Northern Rio Grande Plains of Texas. This soil is of large extent.

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

SERIES ESTABLISHED: Frio County, Texas; 1929

REMARKS:
Edited 11/2016 (RFG-GWH): Converted to tabular format and added metric units. Updated competing series, geographic setting, and associated soils sections.

Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 25 to 75 cm (10 to 30 in). (Bt1, Bt2, and top of Bt3 horizons)
Ochric epipedon: 0 to 25 cm (0 to 10 in). (A horizon)
Abrupt texture change: at 25 cm (10 in) the upper boundary of the Bt1 horizon
Argillic horizon: 25 to 114 cm (10 to 45 in). (Bt1, Bt2, Bt3, and Btk horizons)

Additional Data: KSSL Data from Gonzales County 93TX177008. Particle-size analysis, salinity and sodicity tests were performed at the project office on 2 pedons.

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

---

National Cooperative Soil Survey
U.S.A.