LOCATION LAZARE TXEstablished Series
TAXONOMIC CLASS: Fine, smectitic, thermic Udic Haplusterts
TYPICAL PEDON: Lazare silty clay, rangeland, midway between microhigh and microlow, 0.1 percent slope in playa basin at an elevation of about 553 meters (1750 feet). (Colors are for dry soil unless otherwise stated.)
A--0 to 31 cm (0 to 12 in); dark gray (10YR 4/1) silty clay, very dark gray (10YR 3/1) moist; moderate fine and medium subangular blocky structure; very hard, firm, very sticky and plastic; common very fine, fine, and few medium roots; noneffervescent; neutral; gradual wavy boundary. (Thickness is 15 to 33cm [6 to 13 in])
Bss--31 to 64 cm (12 to 25 in); dark gray (10YR 4/1) silty clay, very dark gray (10YR 3/1) moist, moderate coarse wedge shaped aggregates parting to moderate medium angular blocky structure; extremely hard, very firm, very sticky and plastic; common very fine and fine roots; few fine pores; about 1 percent fine calcium carbonate nodules; few siliceous gravels less than 1 cm across long axis; many distinct slickensides; noneffervescent; moderately alkaline; gradual smooth boundary.
Bkss1--64 to 109 cm (25 to 43 in); dark gray (10YR 4/1) silty clay, very dark gray (10YR 3/1) moist; moderate coarse wedge shaped aggregates parting to moderate medium angular blocky structure; extremely hard, very firm, very sticky and plastic; few very fine and fine roots mainly confined to stress fractures; very few fine pores; about 2 percent fine calcium carbonate nodules; few 1 to 3 mm black (10YR 2/1) iron-manganese concretions; few siliceous gravels mainly less than 1 cm across long axis; many distinct slickensides; very slight effervescent; moderately alkaline; gradual wavy boundary.
Bkss2--109 to 175 cm (43 to 69 in); dark grayish brown (10YR 4/2) silty clay, very dark grayish brown (10YR 3/2) moist; moderate medium wedge shaped aggregates parting to moderate medium angular blocky structure; extremely hard, very firm, very sticky and plastic; very few very fine roots; about 3 percent fine calcium carbonate nodules; few 1 to 2 mm size black (10YR 2/1) iron-manganese concretions; many distinct slickensides in upper part decreasing to few in lower part; slightly effervescenct; moderately alkaline; gradual wavy boundary. (Combined thickness of the Bss and Bkss horizons is 94 to 152 cm [37 to 60 inches])
Bk--175 to 228 cm (69 to 90 in); brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium prismatic structure parting to moderate medium angular blocky; extremely hard, very firm, very sticky and plastic; common pressure faces on vertical peds; about 1 percent fine calcium carbonate nodules; few 1 to 2 mm size black (10YR 2/1) iron-manganese concretions; noneffervescent; moderately alkaline.
TYPE LOCATION: Foard County, Texas; From the courthouse in Crowell, 21.5 miles west on U. S. Highway 70; 2.0 miles north on county road; 1.84 miles northeast and east on ranch road; 1.0 mile north; 700 feet west along fence line, and 370 feet north in rangeland; Latitude: 34 degrees, 08 minutes, 47.4 seconds North; Longitude: 100 degrees, 02 minutes, 24.4 seconds West. USGS topographic quadrangle Baker, Texas; NAD 1927.
RANGE IN CHARACTERISTICS:
Soil Moisture: An ustic soil moisture regime. The soil moisture control section is dry in some or all parts for more than 90 but less than 150 cumulative days in normal years. July through August and November through March are the driest months. Intermittently moist from September through October and April through June. These soils receive runoff from surrounding uplands and the soil moisture control section is moist for longer periods of time than is normal for the climate of the series province.
Mean annual soil temperature: 17 to 19 degrees C (63 to 66 degrees F)
Depth to secondary calcium carbonate: 15 to 61 cm (6 to 24 in)
Depth to slickensides: 15 to 36 cm (6 to 14 in)
Solum thickness: more than 203 cm (80 in)
Particle-size control section: 40 to 55 percent silicate clay.
This is a cyclic soil and undisturbed areas have gilgai microrelief with microhighs 15 to 51 cm (6 to 20 in) higher than microlows. Distance between the center of the microhigh and the center of the microlow is about 1 to 7 m (5 to 12 ft). The microhigh makes up about 25 percent, the intermediate, or area between the high and low, about 50 percent, and the microlow about 25 percent. Cracks open and close each year except during higher than normal rainfall years, and remain open for less than 150 cumulative days during most years. When dry, 1 to 3 inch wide cracks extend from the surface to a depth of 102 cm (40 inches) or more. Cracks are more prominent in the microlows. COLE is more than 0.07. The range in characteristics represents 50 percent or more of each pedon unless otherwise stated.
A horizon:
Hue: 10YR
Value: 3 or 4, 2 or 3 moist
Chroma: 1 or 2
Texture: silty clay or clay
Redox features: none or few
Effervescence: none to strong
Reaction: neutral to moderately alkaline
Bss horizon
Hue: 10YR
Value: 4 or 5, 3 or 4 moist
Chroma: 1 or 2
Texture: silty clay or clay
Redox features; none or few
Visible calcium carbonate: 0 to 3 percent by volume in the form of nodules
Effervescence: none to strong
Reaction: slightly alkaline or moderately alkaline
Bkss1 horizon
Hue: 10YR or 2.5Y
Value: 4 or 5, 3 or 4 moist
Chroma: 1 or 2
Texture: silty clay or clay
Redox features: none to common
Visible calcium carbonate: 0 to 5 percent by volume in the form of masses and nodules
Effervescence: very slight to violent
Reaction: moderately alkaline
Bkss2 horizon
Hue: 7.5YR, 10YR, 2.5Y
Value: 4 to 6, 3 to 5 moist
Chroma: 1 to 3
Texture: clay loam, silty clay, clay
Redox features: none to common
Visible calcium carbonate: 1 to 8 percent in the form of threads, masses, and nodules
Effervescence: slight to violent
Reaction: moderately alkaline
Bk horizon
Hue: 7.5YR or 10YR
Value: 4 to 7, 3 to 6 moist
Chroma: 1 to 3
Texture: clay loam, silty clay loam, silty clay
Redox features: none to common
Visible calcium carbonate: 1 to 10 percent in the form of threads, masses, and nodules
Effervescence: none to violent
Reaction: moderately alkaline
COMPETING SERIES: These are the
Bleiblerville,
Branyon,
Burleson,
Clarita,
Deport,
Dimebox,
Ellis,
Fairlie,
Heiden,
Houston Black,
Leson,
Luling,
McLean,
Ovan,
Sanger,
Slidell,
Sparenberg, and the
Watonga series. Similar soils also include the
Chapel,
Lazbuddie,
Lockney,
Ranco, and
Randall series. Bleiblerville, Branyon, Burleson, Clarita, Deport, Dimebox, Ellis, Fairlie, Heiden, Houston Black, Leson, Luling, Ovan, Sanger, Slidell, and Watonga soils: are moist for longer periods in the soil moisture control section and are not in enclosed depressions.
Chapel series: have a calcic horizon within 102 cm (40 inches) of the mineral soil surface.
Lazbuddie and Lockney soils: have cracks that remain open for more than 150 cumulative days during most years.
McLean and Sparenburg soils: formed in clayey lacustrine sediments derived from
Blackwater Draw
Formation of Pleistocene age and are in a slightly dryer climate.
Ranco soils: have aquic conditions for some time during normal years.
Randall soils: have aquic conditions for some time during normal years and have cracks that remain open for 90 or more cumulative days during most years.
GEOGRAPHIC SETTING:
Parent material: clayey Pleistocene age lacustrine sediments.
Landform: In 2 to 8 feet deep depressions or shallow playas that range in size from a few acres to about 25 acres
Slope: 0 to 2 percent
Mean annual air temperature: 15 to 18 degrees C (60 to 64 degrees F)
Mean annual precipitation: 533 to 660 mm (21 to 26 in)
Frost-free period: 212 to 225 days
Elevation: 411 to 762 m (1350 to 2500 ft)
Thornthwaite annual P-E indices: 32 to 37
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Abilene,
Eastall,
Hollister,
La Casa,
Kingco,
Rotan,
Rowena,
Sagerton, and
Westill series.
Abilene, La Casa , Rotan, Sagerton, and Westill soils have an argillic horizon and are on higher well drained areas.
Eastall soils are on lower poorly drained areas where water ponds for long to very long periods in most years and have an aquic moisture regime.
Hollister and Kingco soils are on higher well drained areas.
Rowena soils have mixed mineralogy and are on higher well drained areas.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Very slow permeability.
Surface runoff is negligible. Ponding frequency is occasional or frequent.
Ponding duration is very brief or brief period in most years. Ponding for long to very long duration may occur but is unlikely in most years.
USE AND VEGETATION: Used mainly for livestock grazing with some areas used for crop production. Common vegetation includes buffalograss, vine mesquite, western wheatgrass, white tridens, and fall aster. Sedges and frog-fruit grow in some of the microdepressions. Stunted lotebush and mesquite grow on some of the microhighs. A few areas are cultivated to wheat, cotton, and sorghums. This soil has been correlated to the Lakebed (078BY078TX) range site in MLRA-78.
DISTRIBUTION AND EXTENT: Central Rolling Red Plains, Western Part (MLRA 78B in LRR H) of northwestern Texas. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: MLRA-78 Soil Survey; Foard County, Texas; 2004. The name is from a nearby community in Hardeman County.
REMARKS: The Lazare series was formerly included in the Lipan, Roscoe, and Randall series.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 228 cm (0to 90 in).
Vertic features: 30 to 175 cm (12 to 69 in)(Bss, Bkss horizons) wedge-shaped aggregates and slickensides. Cracks open and close each year except during higher than normal rainfall years, and remain open for less than 150 cumulative days during most years. When dry, 1.3 to 6.4 cm (0.5 to 2.5 in) wide cracks extend from the surface to a depth of 102 cm (40 inches) or more.
ADDITIONAL DATA: None
TAXONOMIC VERSION: Keys to Soil Taxonomy, Tenth Edition, 2006