LOCATION DARROUZETT TX+OK
Established Series
Rev. ERB-SLM
09/2020
DARROUZETT SERIES
The Darrouzett series consists of very deep, well drained, moderately slowly permeable soils that formed in calcareous silty and clayey loess and alluvium of Pleistocene age. These soils are on nearly level to gently sloping loess-draped stream terraces. Slopes range from 0 to 5 percent. Mean annual precipitation is about 508 mm (20 in) and mean annual air temperature is about 15 degrees C (59 degrees F).
TAXONOMIC CLASS: Fine, mixed, superactive, thermic Torrertic Argiustolls
TYPICAL PEDON: Darrouzett silt loam, on a 2 percent slope in previous cropland returned to rangeland at an elevation of 751 meters (2,465 ft). (Colors are for dry soil unless otherwise stated.)
Ap--0 to 12 cm (0 to 5 in); brown (10YR 5/3) silt loam, very dark grayish brown (10YR 3/2), moist; weak medium subangular blocky structure parting to moderate medium granular; soft, very friable; many medium and many fine roots throughout; noneffervescent; slightly acid, pH 6.1; clear smooth boundary.
A--12 to 36 cm (5 to 14 in); brown (10YR 5/3) silty clay loam, dark brown (10YR 3/3), moist; moderate medium subangular blocky structure parting to weak fine subangular blocky; soft, very friable; few medium and many fine roots throughout; noneffervescent; neutral, pH 6.8; gradual smooth boundary. (Combined thickness of the A horizon is 15 to 43 cm [6 to 17 in])
Btk1--36 to 58 cm (14 to 23 in); grayish brown (10YR 5/2) silty clay loam, very dark grayish brown (10YR 3/2), moist; moderate medium prismatic structure parting to moderate medium subangular blocky; slightly hard, friable; very few medium roots between peds and few fine roots between peds; common prominent clay films on all faces of peds; few distinct carbonate coats on vertical faces of peds; few fine and few medium distinct irregular carbonate masses in matrix; very slight effervescence (2 percent calcium carbonate); moderately alkaline, pH 8.2; gradual smooth boundary. (Thickness of the upper Bt and/or Btk horizon is 18 to 51 cm [7 to 20 in])
Btkss1--58 to 89 cm (23 to 35 in); dark grayish brown (10YR 4/2) silty clay, very dark grayish brown (10YR 3/2), moist; strong medium prismatic structure parting to strong medium wedge; very hard, firm; few fine roots between peds; many prominent slickensides (pedogenic) on tops of soil columns; very many prominent organoargillans on all faces of peds; common fine and common medium distinct irregular carbonate masses on faces of peds; slight effervescence (3 percent calcium carbonate); moderately alkaline, pH 8.3 gradual smooth boundary.
Btkss2--89 to 118 cm (35 to 47 in); brown (10YR 4/3) silty clay, very dark grayish brown (10YR 3/2), moist; moderate medium prismatic parting to moderate medium angular blocky structure; hard, very firm; very few fine roots between peds; few prominent slickensides (pedogenic) on tops of soil columns; common prominent organoargillans on vertical faces of peds; common medium prominent irregular moderately cemented carbonate nodules in matrix; very slight effervescence (1 percent calcium carbonate); moderately alkaline, pH 8.4; clear smooth boundary. (Combined thickness of the Btss (where present) and Btkss horizon is 17 to 94 cm [7 to 37 in])
Btk2--118 to 166 cm (47 to 65 in); yellowish brown (10YR 5/4) silty clay loam, dark yellowish brown (10YR 3/4), moist; moderate coarse subangular blocky parting to moderate medium subangular blocky structure; slightly hard, very friable; few fine roots throughout; few distinct clay films on all faces of peds; common coarse and common medium prominent threadlike carbonate masses on vertical faces of peds; very slight effervescence (1 percent calcium carbonate); strongly alkaline, pH 8.5; clear smooth boundary. (Combined thickness of the lower Btk horizon is 61 to 109 cm [24 to 43 in])
Btk3--166 to 205 cm (65 to 81 in); brown (7.5YR 4/4) clay loam, dark brown (7.5YR 3/4), moist; moderate coarse subangular blocky parting to moderate medium subangular blocky structure; slightly hard, very friable; very few fine roots throughout; few distinct organoargillans on vertical faces of peds; few fine faint threadlike and few faint irregular carbonate masses on surfaces along root channels; very slight effervescence (1 percent calcium carbonate); moderately alkaline, pH 8.2.
TYPE LOCATION: Beaver County, Oklahoma; from Slapout, 4 miles east on State Highway 270, then 5 miles south on county road NS 166; 1397 ft (425 m) south and 1027 feet (313 m) east of the northwest corner of Section 22, Township 1N, Range 28E (Cimarron meridian).
USGS topographic quadrangle: Slapout, Oklahoma
Latitude: 36 degrees, 32 minutes, 22.30 seconds N
Longitude: 100 degrees, 2 minutes, 16.98 seconds W
Datum: WGS84
Decimal Degrees
Latitude: 36.5265007
Longitude: -100.4944687
UTM Northing: 4044294
UTM Easting: 470783
UTM zone 14S
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 220 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.
Solum thickness: more than 203 cm (80 in)
Thickness of the mollic epipedon: 50 to 135 cm (20 to 53 in)
Depth to slickensides or wedge-shaped structure: 18 to 66 cm (7 to 26 in)
Thickness of slickensides: 17 to 94 cm (7 to 37 in)
Depth to argillic horizon: 15 to 65 cm (6 to 26 in)
Thickness of argillic horizon: 49 to 184 cm (20 to 73 in)
Depth to secondary calcium carbonate: 15 to 91 cm (6 to 36 in)
Depth to calcic horizon (where present): 165 to greater than 203 cm (50 to greater than 80 in)
Particle-size control section (weighted average)
Total clay content: 35 to 45 percent
Silicate clay content: 35 to 45 percent
Clay-sized carbonate content: 0 to 4 percent
Total sand content: 3 to 25 percent
Rock fragments: none
A or Ap horizons:
Hue: 7.5 YR or 10YR
Value: 3 to 5, 1 to 3 moist
Chroma: 2 or 3 moist or dry
Texture: loam, silt loam, clay loam, or silty clay loam
Total clay content: 15 to 35 percent
Clay-sized carbonate content: 0 percent
Sand content: 5 to 25 percent
Effervescence: None to slight
Reaction (pH): slightly acid to slightly alkaline (6.1-7.8)
Bt horizon (where present):Hue: 7.5YR or 10YR
Value: 3 to 5, 2 or 3 moist
Chroma: 2 or 3 moist or dry
Texture: clay loam, silty clay loam, silty clay, or clay
Total clay content: 30 to 42 percent
Clay-sized carbonate content: 0 percent
Sand content: 3 to 25 percent
Effervescence: none to slight
Reaction (pH): neutral or slightly alkaline (6.6-7.8)
Upper Btk horizon(s):
Hue: 7.5YR or 10YR
Value: 3 to 5, 2 to 3 moist
Chroma: 2 or 3 moist or dry
Texture: clay loam, silty clay loam, silty clay, or clay
Total clay content: 30 to 42 percent
Clay-sized carbonate content: 0 percent
Sand content: 3 to 25 percent
Identifiable calcium carbonate: amount-1 to 5 percent; size-fine to medium; kind-films, masses, nodules, or finely disseminated carbonate
Calcium carbonate equivalent: 1 to 5 percent
Effervescence: very slight or slight
Reaction (pH): slightly alkaline or moderately alkaline (7.8-8.4)
Btss horizon (where present):
Hue: 7.5 YR or 10YR
Value: 3 to 5, 2 to 3 moist
Chroma: 2 or 3 moist or dry
Texture: clay loam, silty clay loam, silty clay, or clay
Total clay content: 35 to 50 percent
Clay-sized carbonate content: 0 percent
Sand content: 3 to 25 percent
Slickensides: 10 to 70 percent; distinct or prominent
Effervescence: none
Reaction (pH): neutral or slightly alkaline (6.6 to 7.8)
Btkss horizon(s):
Hue: 7.5YR or 10YR
Value: 4 or 5, 3 or 4 moist
Chroma: 2 or 3 moist or dry
Texture: clay loam, silty clay loam, silty clay, or clay
Total clay content: 35 to 50 percent
Clay-sized carbonate content: 0 to 4 percent
Sand content: 3 to 25 percent
Slickensides: 10 to 70 percent; distinct or prominent
Identifiable calcium carbonate: amount-1 to 10 percent; size-fine to medium; kind-films, masses, nodules, or finely disseminated carbonate
Calcium carbonate equivalent: 2 to 5 percent
Effervescence: very slight to strong
Reaction (pH): slightly alkaline or moderately alkaline (7.8-8.4)
Lower Btk horizon(s):
Hue: 5YR to 10YR
Value: 4 to 7, 4 to 6 moist
Chroma: 3 to 6 moist or dry
Texture: loam, silt loam, clay loam, silty clay loam, or clay
Total clay content: 22 to 34 percent
Clay-sized carbonate content: 1 to 4 percent
Sand content: 5 to 30 percent
Identifiable calcium carbonate: amount-1 to 20 percent; size-fine to medium; kind-films, masses, nodules, or finely disseminated carbonate
Calcium carbonate equivalent: 2 to 14 percent
Effervescence: slight to violent
Reaction (pH): moderately alkaline or moderately alkaline (7.4-8.4)
BCk and Bk horizons (where present):
Hue: 5YR to 10YR
Value: 4 to 6, 4 to 5 moist
Chroma: 2 to 6 moist or dry
Texture: loam, clay loam, silt loam, silty clay loam
Total clay content: 10 to 34 percent
Silicate clay content: 10 to 34 percent
Clay-sized carbonate: 1 to 6 percent
Sand content: 5 to 45 percent
Rock fragments: amount-0 to 5 percent; size-fine to coarse gravels; kind-indurated subangular or irregular strongly cemented carbonate nodules or caliche fragments
Identifiable calcium carbonate: amount-5 to 10 percent; size-fine to medium; kind-films, filaments, masses, nodules or finely disseminated carbonate
Calcium carbonate equivalent: 2 to 25 percent
Effervescence: slight to violent
Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)
COMPETING SERIES: There are no competing series. Similar soils include the
Balko,
Gruver,
Perryton,
Sherm,
Twichell, and
Zella series.
Balko,
Gruver,
Perryton,
Sherm,
Twichell, and
Zella soils: formed exclusively from silty and clayey eolian deposits; have average annual soil temperatures less than 15 degrees C (59 degrees F); and occur on high plains landscapes
GEOGRAPHIC SETTING:
Parent material: silty and clayey eolian and alluvial sediments of Pleistocene age
Landscape: Dissected high plains
Landform: loess-draped stream terraces
Slope: 0 to 5 percent
Mean annual precipitation: 457 to 660 mm (18 to 26 in)
Thornthwaite annual P-E Index: 25 to 36
Mean annual air temperature: 13.3 to 15 degrees C (56 to 59 degrees F).
Frost-free period: 180 to 200 days
Elevation: 609.6 to 914.4 m (2,000 to 3,000 ft)
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the similar
Alibates series and the
Abbie,
Ady, Alibates,
Alopark,
Berda,
Catesby,
Chiquita,
Irene,
Kroeker,
Laverne,
Mansic,
Mobeetie,
Mocane,
Ochiltree,
Oklark,
Paloduro,
Slapout, and
Veal series.
Abbie,
Ady,
Alibates, and
Kroeker soils: occur on similar positions and have a fine-loamy particle size class
Alopark,
Slapout, and
Veal soils: occur on adjacent hillslopes; have ochric epipedons; do not have argillic horizons; and have a calcic horizon present within 100 cm (40 in) of the soil surface
Catesby and
Oklark soils: occur on adjacent hillslopes; do not have argillic horizons; have a coarse-loamy particle-size class; and have a calcic horizon present within 100 cm (40 in) of the soil surface
Berda soils: occur on adjacent hillslopes; have an ochric epipedon; do not have argillic horizons; and have a fine-loamy particle-size class
Chiquita soils: occur on similar positions; have an ochric epipedon; and have a fine-loamy particle-size class
Irene soils: occur on similar positions; and have a fine-silty particle size class
Laverne soils: occur on adjacent hillslopes; and have a lithic contact within 50 cm (20 in) of the soil surface
Mansic soils: occur on adjacent hillslopes; do not have argillic horizons; have a fine-loamy particle-size class; and have a calcic horizon within 100 cm (40 in) of the soil surface
Mobeetie soils: occur on adjacent hillslopes, have an ochric epipedon, do not have an argillic horizon, and have a coarse-loamy particle-size control section
Mocane soils: occur on adjacent hillslopes, have an ochric epipedon, do not have an argillic horizon, and have a sandy particle-size control section
Ochiltree soils: occur on adjacent hillslopes, have an ochric epipedon, and have a petrocalcic horizon within 25 cm (10 in) of the soil surface
Paloduro soils: occur on adjacent hillslopes, do not have an argillic horizon, and have a fine-loamy particle-size control section
DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: very slow
Runoff: high on 0 to 1 percent slopes and very high on 1 to 5 percent slopes
USE AND VEGETATION:
Major uses: crop production and livestock grazing
Native vegetation: Predominantly buffalograss and blue grama, with lesser amounts of sideoats grama, vine-mesquite, western wheatgrass, galleta, and silver bluestem.
Crops: corn, grain sorghum, and winter wheat
Ecological sites assigned to phases and components of this series are listed below. Current ecological site assignments are in Web Soil Survey. Components of this series include the following ecological sites: Clay Loam 16-24" PZ (R077EY051TX)
DISTRIBUTION AND EXTENT:
General area: northwestern Oklahoma, southwest Kansas, and the Oklahoma and Texas Panhandles
Land Resource Region: H - Central Great Plains Winter Wheat and Range Region
Major Land Resource Area: 77E - Southern High Plains, Breaks
Extent: Moderate
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Lipscomb County, Texas; 1971.
REMARKS:
Diagnostic horizons and features recognized in this pedon:
Mollic epipedon: 0 to 118 cm (0 to 47 in) (Ap, A, Btk1, Btkss1, and Btkss2 horizons)
Argillic horizon: 36 to 205 cm (14 to 81 in) (Btk1, Btkss1, Btkss2, Btk2, and Btk3 horizons)
Slickensides: 58 to 118 cm (23 to 47 in) (Btkss1 and Btkss2 horizons)
Torrertic (dry vertic) features: Cracks to surface and/or slickensides within 125 cm (49 in) of the soil surface
ADDITIONAL DATA: KSSL data available: S2010OK007001 (TL-Beaver County, OK); S2006OK007002 (Beaver County, OK)
TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014.
National Cooperative Soil Survey
U.S.A.