LOCATION PERRYTON TXEstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, mesic Torrertic Argiustolls
TYPICAL PEDON: Perryton silty clay loam--on a nearly level plain, 0.2 percent slope in cultivated field. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 23 cm (0 to 9 in); dark grayish brown (10YR 4/2) silty clay loam, very dark grayish brown (10YR 3/2) moist; weak fine granular and weak fine and medium subangular blocky structure; hard, friable; many very fine and fine roots; cracks 25 mm wide at the surface extend through the horizon; moderately alkaline; abrupt smooth boundary. (20 to 40 cm thick)
Bt1--23 to 51 cm (9 to 20 in); dark grayish brown (10YR 4/2) silty clay, very dark grayish brown (10YR 3/2) moist; moderate medium prismatic structure parting to moderate fine and medium angular blocky; very hard, very firm; many very fine and fine roots; common fine tubular pores; cracks 13 mm wide extend through the horizon; common distinct clay films and a few pressure faces on ped surfaces; moderately alkaline; clear smooth boundary.
Bt2--51 to 71 cm (20 to 27 in); grayish brown (10YR 5/2) silty clay loam, dark grayish brown (10YR 4/2) moist; moderate medium prismatic structure parting to moderate medium angular blocky; very hard, very firm; common very fine and fine roots; common fine tubular pores; cracks 13 mm wide extend through the horizon; common distinct clay films and a few pressure faces on ped surfaces; few very fine filaments of calcium carbonate in pores; slightly effervescent; moderately alkaline; clear smooth boundary. (combined thickness of the Bt horizons is 25 to 120 cm)
Btk1--71 to 91 cm (27 to 35 in); grayish brown (10YR 5/2) silty clay loam, dark grayish brown (10YR 4/2) moist; moderate fine and medium angular blocky structure; hard, firm; few very fine and fine roots; common fine tubular pores; common distinct clay films on ped faces; common fine filaments of calcium carbonate in pores; strongly effervescent; moderately alkaline; clear smooth boundary. (13 to 40 cm thick)
Btk2--91 to 147 cm (35 to 57 in); brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; moderate coarse prismatic structure parting to moderate fine and medium subangular blocky; hard, friable; few very fine roots; few fine tubular pores; common distinct clay films on ped faces; common fine filaments of calcium carbonate in pores; slightly effervescent; moderately alkaline; gradual smooth boundary.
2Btk3--147 to 193 cm (57 to 76 in); strong brown (7.5YR 5/6) silty clay loam, strong brown (7.5YR 4/6) moist; moderate coarse prismatic structure parting to moderate fine and medium subangular blocky; hard, friable; few very fine roots; few fine tubular pores; common distinct clay films on ped faces; few fine black (10YR 2/1) masses of iron-manganese between ped faces; few fine filaments of calcium carbonate in pores; slightly effervescent; moderately alkaline; clear smooth boundary. (combined thickness of the 2Btk horizons is 25 to 120 cm)
2Btk4--193 to 203 cm (76 to 80 in); light brown (7.5YR 6/4) clay loam, brown (7.5YR 5/4) moist; moderate fine and medium subangular blocky structure; hard, friable; common fine and very fine tubular pores; few faint clay films on ped faces; common filaments, masses, and nodules of calcium carbonate; 26 percent calcium carbonate equivalent; violently effervescent; strongly alkaline.
TYPE LOCATION: Ochiltree County, Texas; from the intersection of Farm Road 3045 and Farm Road 376 which is 3.2 kilometers (2 miles) south of Farnsworth; 8 kilometers (5 miles) south on Farm Road 376; 0.8 kilometers (0.5 mile) east down turn row; 30 meters (100 feet) south in field; Latitude: 36 degrees, 12 minutes, 58 seconds N; Longitude: 100 degrees, 57 minutes, 15 seconds W; Sourdough Creek Texas USGS quad; NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: An ustic moisture regime bordering on aridic. The soil moisture control section is dry in some or all parts for more than 180 but less than 205 days, cumulative, in normal years. July through August and December through February are the driest months. These soils are intermittently moist in September through November and March through June.
Mean annual soil temperature: 13 to 15 degrees C (55 to 59 degrees F)
Thickness of the mollic epipedon: 50 to 100 cm (20 to 40 in)
Depth to secondary calcium carbonate: 60 to 150 cm (23 to 60 in)
Depth to calcic horizon: 150 to 203 cm (60 to 80 in)
Solum thickness: More than 203 cm (80 in)
Particle-size control section: 35 to 42 percent silicate clay
Linear extensibility: averages 7 to 9 cm to a depth of 100 cm. When dry, surface cracks extend to depths exceeding 50 cm (20 in).
Ap horizon:
Hue: 10YR
Value: 4 or 5, 3 or 4 moist
Chroma: 2 or 3
Texture: silt loam or silty clay loam
Effervescence: None
Reaction: neutral or slightly alkaline
Bt horizon:
Hue: 10YR
Value: 4 or 5, 3 or 4 moist.
Chroma: 2 or 3.
Texture: silty clay loam or silty clay
Visible secondary calcium carbonate: less than 2 percent as films or filaments in lower part.
Effervescence: None to slight
Reaction: Slightly alkaline or moderately alkaline.
Btk horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5, 3 or 4 moist
Chroma: 3 or 4
Texture: silty clay loam or silty clay.
Visible secondary calcium carbonate:
Effervescence: Slight to strong
Reaction: Slightly alkaline or moderately alkaline.
2Btk horizon:
Hue: 5YR or 7.5YR
Value: 4 to 6, 3 to 5 moist.
Chroma: 3 to 6.
Texture: loam, silty clay loam, or clay loam
Visible secondary calcium carbonate:
Effervescence: slight to violent.
Reaction: moderately alkaline or strongly alkaline.
COMPETING SERIES: These are no competing series. Similar soils include the
Darrouzett,
Gruver,
Sherm and
Zella series.
Darrouzett series: have mean annual soil temperature of more than 15 degrees C.
Gruver and Sherm series: have in the argillic horizon both a chroma more than 5 and do not have a clay decrease of 20 percent or more from the maximum within 150 cm; in addition the depth to a calcic horizon ranges from 76 to 150 cm.
Zella series: Have smectitic clay mineralogy and do not have a calcic horizon.
GEOGRAPHIC SETTING:
Parent material: loamy and clayey eolian sediments of Pleistocene age.
Landform: eolian plain
Slopes: 0 to 1 percent
Mean annual air temperature: 12 to 14 degrees C (53 to 58 degrees F)
Mean annual precipitation: 432 to 559 mm (17 to 26 in)
Frost free period: 170 to 200 days
Elevation ranges from 916 to 1,448 meters (3,000 to 4,750 ft)
Thornthwaite annual P-E Index Values: 25 to 36
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the similar
Dumas,
Gruver,
Sherm, and
Texline series and the
Conlen,
Dalhart,
Dallam,
Hansford,
Knoblaw,
Lautz,
Oslo,
Plack, and
Sunray soils.
Conlen soils: are on plains or the shoulder on a valley side and have carbonatic mineralogy.
Dalhart and Dallam soils: are on similar landscape positions and have an ochric epipedon.
Dumas, Gruver, Sherm, and Texline soils: are on similar landscape positions.
Hansford, Knoblaw, and Lautz soils: are on the floor of playa basins.
Oslo soils: are on similar landscape positions and have 18 to 35 percent silicate clay in the particle-size control section.
Plack soils: are on landscape positions adjacent to draws and have a petrocalcic horizon.
Sunray soils: are on plains or side slopes of draws and have 18 to 35 percent silicate clay in the particle-size control section.
DRAINAGE AND PERMEABILITY: Well drained. Slow permeability. Surface runoff is medium on 0 to 1 percent slopes.
USE AND VEGETATION: Mainly cultivated to corn, grain sorghum, and winter wheat. A considerable acreage is irrigated. Climax vegetation includes buffalograss and blue grama, with lesser amounts of vine-mesquite, western wheatgrass, galleta, and silver bluestem. This soil has been correlated to the Deep Hardland (077AY001TX) ecological site in MLRA-77A.
DISTRIBUTION AND EXTENT: Southern High Plains, Northern Part (MLRA 77A in LRR H)of Texas Panhandle. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Hansford County, Texas; 2007.
REMARKS: Series established during the MLRA-77 Update Survey of Hansford County Texas; 2007. These soils were previously included with the Darrouzett series.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 71 cm (Ap and Bt horizons)
Argillic horizon: 23 to 203 cm (Bt1, Bt2, Btk1, 2Btk2, 2Btk3, 2Btk4 horizons)
Calcic horizon: 193 to 203 cm (2Btk4 horizon)
Lithologic discontinuity: 147 to 203 cm (2Btk horizons)
Torrertic properties: cracks 5 mm or more wide through a thickness of 30 cm or more and have linear extensibility that is 6.0 cm or more to a depth of 100 cm.
ADDITIONAL DATA: National Soil Survey Laboratory data sample number: S84TX-357-001, S94TX-357-004, S94TX-357-005, S94TX-357-009, S94TX-357-010, S94TX-357-011, (Ochiltree County, Texas); S57TX-195-002, S94TX-195-004, S94TX-195-006 (Hansford County, Texas); S84TX-111-001 (Dallam County, Texas); S94TX-233-001, S94TX-233-002 (Hutchinson County, Texas).
TAXONOMIC VERSION: Keys to Soil Taxonomy, Tenth Edition, 2006.