LOCATION MANSON TX+OK
Established Series
Rev. TCB-RM
08/2016
MANSON SERIES
The Manson series consists of very deep, well-drained, moderately permeable soils that formed in calcareous, loamy sediments derived from the upper part of the Ogallala Formation of Miocene-Pliocene age. These soils are on gently to moderately sloping interfluves or broad erosion remnants. Slope ranges from 1 to 8 percent. Mean annual precipitation is 496 mm (18 in) and mean annual temperature is 16 degrees C (61 degrees F).
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Calcidic Paleustolls
TYPICAL PEDON: Manson loam, on northwest-facing, convex, 2.5 percent slope in rangeland at an elevation of about 1,000 meters. (Colors are for dry soil unless otherwise stated.)
A--0 to 15 cm (0 to 6 in); brown (7.5YR 4/3) loam, very dark brown (7.5YR 2.5/3) moist; moderate fine and medium subangular blocky; hard, friable; many very fine and fine roots; many fine and medium tubular pores; 6 percent calcium carbonate equivalent, violently effervescent; slightly alkaline; gradual smooth boundary. (Thickness is 13 to 30 cm [5 to 12 in] thick)
Bw--15 to 36 cm (6 to 14 in); brown (7.5YR 4/3) clay loam, very dark brown (7.5YR 2.5/3) moist; weak coarse prismatic structure parting to moderate fine and medium subangular blocky; hard, friable; common very fine and fine roots; common fine and medium tubular pores; common wormcasts; 14 percent calcium carbonate equivalent, violently effervescent; moderately alkaline; gradual smooth boundary. (Thickness is 0 to 25 cm [0 to 10 in] thick)
Btk1--36 to 56 cm (14 to 22 in); brown (7.5YR 4/4) clay loam, dark brown (7.5YR 3/4) moist; weak coarse prismatic structure parting to moderate fine and medium subangular blocky; very hard, very firm; few very fine roots; common very fine and fine tubular pores; few distinct clay films on ped surfaces; many masses and nodules of calcium carbonate, 28 percent calcium carbonate equivalent, violently effervescent; moderately alkaline; gradual smooth boundary.
Btk2--56 to 99 cm (22 to 39 in); strong brown (7.5YR 5/6) silty clay loam, strong brown (7.5YR 4/6) moist; moderate medium prismatic structure parting to strong medium subangular blocky; very hard, very firm; few very fine and fine roots; few fine tubular pores; few distinct clay films on ped surfaces; many masses and nodules of calcium carbonate, 27 percent calcium carbonate equivalent; violently effervescent; strongly alkaline; gradual smooth boundary.
Btk3--99 to 117 cm (39 to 46 in); strong brown (7.5YR 5/6) clay loam, strong brown (7.5YR 4/6) moist; moderate medium prismatic structure parting to strong medium subangular blocky; very hard, very firm; few very fine and fine roots; few fine tubular pores; few distinct clay films on ped surfaces; common masses and nodules of calcium carbonate, 27 percent calcium carbonate equivalent; violently effervescent; strongly alkaline; gradual smooth boundary.
Btk4--117 to 160 cm (46 to 63 in); reddish yellow (7.5YR 6/8) clay loam, strong brown (7.5YR 5/8) moist; moderate medium prismatic structure parting to strong medium subangular blocky; very hard, very firm; few very fine and fine roots; few fine tubular pores; few distinct clay films on ped surfaces; many masses and nodules of calcium carbonate, 32 percent calcium carbonate equivalent; violently effervescent; strongly alkaline; gradual smooth boundary.
Btk5--160 to 193 cm (63 to 76 in); strong brown (7.5YR 5/6) clay loam, strong brown (7.5YR 5/6) moist; weak medium prismatic structure parting to moderate medium subangular blocky; very hard, very firm; few fine tubular pores; few distinct clay films on ped surfaces; many masses and nodules of calcium carbonate, 24 percent calcium carbonate equivalent; violently effervescent; strongly alkaline; clear smooth boundary. (Combined thickness of the Btk horizons is 148 to 185 cm [58 to 73 in])
2Btk6--193 to 203 cm (76 to 80 in); yellowish red (5YR 5/8) clay, yellowish red (5YR 4/6) moist; moderate fine and medium subangular blocky structure; very hard, very firm; few fine tubular pores; few distinct clay films on ped surfaces; many masses and nodules of calcium carbonate, 15 percent calcium carbonate equivalent; violently effervescent; moderately alkaline.
TYPE LOCATION: Carson county, Texas; from the intersection of Texas Highway 60 and Farm Road 294 in White Deer; 2.4 kilometers (1.5 miles) north on Farm Road 294; 1.6 kilometers (1 mile) west on county road; 241 meters (0.15 mile) northwest on private ranch road; 46 meters (150 feet) north of road in rangeland; Latitude: 35 degrees, 28 minutes, 39.1 seconds N; Longitude: 101 degrees, 12 minutes, 25.3 seconds W; White Deer, 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 and August are the driest months. These soils are intermittently moist in September through November and March through June.
Mean annual soil temperature: 16 to 18 degrees C.
Thickness of the mollic epipedon: 20 to 50 cm.
Depth to argillic horizon: 25 to 50 cm.
Depth to visible secondary calcium carbonate: 15 to 45 cm.
Depth to calcic horizon: 25 to 60 cm.
Solum thickness: more than 203 cm.
Particle-size control section: 18 to 35 percent silicate clay and less than 15 percent by weight fine sand or coarser in the particle-size control section.
A horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5, 3 or less moist
Chroma: 2 or 3
Texture: loam
Effervescence: strong or violent
Reaction: slightly alkaline or moderately alkaline
Bw horizon (where present):
Hue: 7.5YR or 10YR
Value: 4 to 6, 3 to 5 moist
Chroma: 2 to 4
Texture: loam or clay loam
Visible secondary carbonates: less than 2 percent as films or filaments
Calcium carbonate equivalent: 0 to 15 percent by weight
Effervescence: strong or violent
Reaction: slightly alkaline or moderately alkaline
Btk horizons:
Hue: 5YR or 7.5YR
Value: 4 to 8, 3 to 7 moist
Chroma: 3 to 8
Texture: sandy clay loam, silty clay loam, or clay loam
Calcium carbonate equivalent: 10 to 40 percent by weight
Visible secondary carbonates: 3 to 49 percent by volume as filaments, masses, nodules, and finely disseminated carbonates
Effervescence: violent
Reaction: moderately alkaline or strongly alkaline
Btkk horizons (where present):
Hue: 5YR or 7.5YR
Value: 5 to 8, 4 to 7 moist
Chroma: 1 to 4
Texture: clay loam, silty clay, or clay
Calcium carbonate equivalent: 20 to 50 percent by weight.
Visible secondary carbonates: 50 to 80 percent by volume as masses, nodules, and finely disseminated carbonates
Effervescence: violent
Reaction: moderately alkaline or strongly alkaline
2Btk horizon: (where present)
Hue: 5YR or 7.5YR
Value: 4 to 8, 3 to 7 moist
Chroma: 3 to 8
Texture: silty clay or clay
Calcium carbonate equivalent: 10 to 20 percent by weight
Visible secondary carbonates: 3 to 15 percent by volume as filaments, films, and finely disseminated carbonates
Effervescence: strong or violent
Reaction: moderately alkaline
COMPETING SERIES:
This is the
Lutie series in the same family. Similar soils also include the
Mansker,
Mansic, and
Plemons series.
Lutie series: have a higher mean annual precipitation and formed in Permian redbed materials.
Mansker series: have more than 15 percent by weight fine sand or coarser in the particle-size control section and carbonatic mineralogy.
Mansic series: have more than 15 percent by weight fine sand or coarser in the particle-size control section and do not have an argillic horizon.
Plemons series: have an ochric epipedon.
GEOGRAPHIC SETTING:
Parent material: calcareous, loamy sediments derived from the upper part of the
Ogallala Formation of Miocene-Pliocene age.
Landform: interfluve or broad erosion remnant.
Slopes: dominantly 1 to 5 percent, but range to 8 percent.
Elevation: 670 to 1,143 m (2,600 to 4,000 ft).
Mean annual air temperature: 15 to 17 degrees C (55 to 62 degrees F).
Mean annual precipitation: 432 to 559 mm (15 to 21 in).
Frost-free period: 180 to 220 days.
Thornthwaite annual P-E Index Values: 25 to 36.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the similar
Mansic and
Plemons soils and the
Ady,
Alibates,
Berda,
Bippus,
Mobeetie,
Paloduro,
Potter,
Texroy, and
Veal soils.
Mansic and
Plemons soils: are on similar landscape positions.
Ady and
Alibates soils: are on similar landscape positions and have more than 15 percent by weight fine sand or coarser in the particle-size control section and do not have a calcic horizon within 60 cm.
Berda and
Paloduro soils: are on slightly lower landscape positions and do not have a argillic horizon.
Bippus and
Sprone soils: are on lower landscape positions and do not have an argillic horizon or have a calcic horizon within 60 cm.
Mobeetie and
Veal soils: are on slightly lower landscape positions and have less than 18 percent silicate clay in the particle-size control section; in addition Veal soils have carbonatic mineralogy.
Potter soils: are on similar landscape positions and have a loamy-skeletal particle size control section and carbonatic mineralogy.
Texroy soils: are on lower landscape positions and do not have a calcic horizon within 60 cm.
DRAINAGE AND PERMEABILITY: Well drained and moderate permeability. Surface runoff is negligible on slopes less than 1, low 1 to 5 percent slopes, and medium 5 to 8 percent slopes.
USE AND VEGETATION: The soil is primarily used for livestock grazing. The vegetation is short and mid-grasses, mainly gramas and buffalograss and a few woody plants including catclaw and mesquite. Where cultivated, the principle crops are grain sorghum, small grain, and forage crops. This soil has been correlated to the Limey Upland (R-077EY057TX) ecological site in MLRA-77E.
DISTRIBUTION AND EXTENT: Southern High Plains, Breaks (MLRA-77E, LRR H) of Texas, New Mexico, and Oklahoma. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: MLRA-77 Soil Survey; Carson County, Texas; 1995.
REMARKS: These soils were formerly included in the Mansker series.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 36 cm. (A, Bw horizon)
Cambic horizon: 15 to 36 cm. (Bw horizon)
Argillic horizon: 36 to 203 cm. (Btk horizons)
Calcic horizon: 36 to 203 cm. (Btk horizons)
ADDITIONAL DATA: NSSL data available - Sample number S97TX-065-001 (Carson Co. Texas).
Taxonomic version: Keys to Soil Taxonomy, Twelfth Edition, 2014.
National Cooperative Soil Survey
U.S.A.