LOCATION GUADALUPE TX+KS NM OK

Established Series
Rev. ERB-SLM
09/2023

GUADALUPE SERIES

The Guadalupe series consists of very deep, well drained, moderately rapidly permeable soils that formed in sandy and loamy alluvium of Holocene age. These soils occur on nearly level to very gently sloping floodplains. SThe slope range is 0 to 2 percent. Mean annual precipitation is about 520 mm (21 in) and the mean annual air temperature is about 15 degrees C (59 degrees F).

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, thermic Torrifluventic Haplustepts

TYPICAL PEDON: Guadalupe fine sandy loam, on a 0.5 percent linear slope, on a floodplain, in pastureland (cropland returned to pasture) at an elevation of about 713 meters (2,340 ft). (Colors are for dry soil unless otherwise stated.)

Ap--0 to 13 cm (0 to 5 in); grayish brown (10YR 5/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; weak fine granular structure; slightly hard, very friable; strongly effervescent; moderately alkaline; abrupt smooth boundary.

A--13 to 30 cm (0 to 12 in); grayish brown (10YR 5/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; weak very fine subangular blocky structure; hard, friable; common medium to fine pores; common wormcasts; strongly effervescent; moderately alkaline; clear smooth boundary. Combined thickness of the A horizons is 7 to 33 cm (3 to 13 in)

Bw--30 to 63 cm (12 to 25 in); light yellowish brown (10YR 6/4) fine sandy loam, yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure; slightly hard, very friable; few wormcasts; strongly effervescent; moderately alkaline; clear smooth boundary. Combined thickness of the Bw horizons is 0 to 123 cm (0 to 48 in)

Bk1--63 to 76 cm (25 to 30 in); very pale brown (10YR 7/3) fine sandy loam, brown (10YR 5/3) moist; weak fine subangular blocky structure; slightly hard, very friable; common fine and medium pores; common wormcasts; few films and filaments of calcium carbonate; strongly effervescent; moderately alkaline; clear smooth boundary.

Bk2--76 to 97 cm (30 to 38 in); very pale brown (10YR 7/4) sandy clay loam, yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure; hard, friable; few thin strata of fine sandy loam; few very fine to medium pores; few wormcasts; few films and filaments of calcium carbonate; strongly effervescent; moderately alkaline; abrupt smooth boundary. Combined thickness of the Bk horizons is 0 to 180 cm (0 to 71 in)

C1--97 to 114 cm (38 to 45 in); very pale brown (10YR 7/4) loamy fine sand, yellowish brown (10YR 5/4) moist; single grained; loose; few strata of fine sandy loam; strongly effervescent; moderately alkaline; gradual smooth boundary.

C2--114 to 203 cm (45 to 80 in); very pale brown (10YR 8/4) loamy fine sand, very pale brown (10YR 7/4) moist; common distinct yellowish brown (10YR 5/6) iron stains in the matrix; single grained; loose; strongly effervescent; moderately alkaline.

TYPE LOCATION: Hemphill County Texas; from the intersection of US Hwy 60 and Birch Street in Canadian, TX; about 0.8 miles west on birch street to the intersection of Birch Street and County Road I; 150 ft (45 m) north into pasture.

USGS topographic quadrangle: Canadian West, TX
Latitude: 35 degrees 54 minutes 37.45 seconds N
Longitude: 100 degrees 24 minutes 5.85 seconds W
Datum WGS84

Decimal Degrees
Latitude: 35.9104028
Longitude: -100.4016250

UTM Northing: 3974918
UTM Easting: 373528
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: 46 to 203 cm (18 to 80 in)
Thickness of ochric epipedon: 7 to 33 cm (3 to 13 in)
Depth to secondary calcium carbonate: 10 to 91 cm (4 to 36 in)
Thickness of cambic horizon: 25 to 163 cm (10 to 64 in)
Buried horizons: commonly observed but not be present in all soil profiles
Saturation (water table): a seasonal high water table (endosaturation) is possible during wet years from 135 to 203 cm (53 to 80 in) of the soil surface from November through March

Particle-size control section (weighted average):
Section range: 25 to 100 cm (10 to 40 in)
Total clay content: 5 to 18 percent
Silicate clay content: 5 to 18 percent
Clay-sized carbonate content: 0 to 1 percent
Total sand content: 45 to 85 percent
Rock fragments: 0 to 8 percent; fine to coarse gravels; indurated well-rounded quartzite, feldspar, ironstone, and sandstone

Surface Fragments: 0 to 5 percent; fine to coarse gravels; indurated well-rounded quartzite, feldspar, ironstone, and sandstone

A and Ap horizons:
Hue: 7.5YR or 10YR
Value: 4 to 6, 3 to 5 moist
Chroma: 2 to 6 moist or dry
Texture: loamy sand, loamy fine sand, fine sandy loam, sandy loam, or loam
Coarse fragments: 0 to 5 percent; fine to coarse gravels; indurated well-rounded quartzite, feldspar, ironstone, and sandstone
Identifiable calcium carbonate: none
Calcium carbonate equivalent: 0 to 1 percent
Effervescence: none to strong
Reaction (pH): neutral to moderately alkaline (6.6-8.4)

Bw horizons:
Hue: 5YR to 10YR
Value: 4 to 7, 3 to 6 moist
Chroma: 2 to 6 moist or dry
Texture: loamy fine sand, fine sandy loam, sandy loam, or loam
Coarse fragments: 0 to 8 percent; fine to coarse gravels; indurated well-rounded quartzite, feldspar, ironstone, and sandstone
Identifiable calcium carbonate: none
Calcium carbonate equivalent: 0 to 1 percent
Effervescence: none to strong
Reaction (pH): neutral to moderately alkaline (6.6-8.4)

Bk horizons:
Hue: 7.5YR to 10YR
Value: 4 to 7, 3 to 6 moist
Chroma: 2 to 6 moist or dry
Texture: loamy fine sand, loamy sand, fine sandy loam, sandy loam, loam, or sandy clay loam
Coarse fragments: 0 to 8 percent; fine to coarse gravels; indurated well-rounded quartzite, feldspar, ironstone, and sandstone
Identifiable calcium carbonate: 1 to 10 percent; fine to medium; films, filaments, masses, nodules or finely disseminated carbonate
Calcium carbonate equivalent: 1 to 4 percent
Effervescence: very slight to violent
Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

C, Ck, BC, and BCk, horizons (where present):
Hue: 5YR to 10YR
Value: 5 to 8, 4 to 7 moist
Chroma: 2 to 6 moist or dry
Texture: sand, loamy fine sand, loamy sand, fine sandy loam, sandy loam, loam, or sandy clay loam and their and their gravelly counterparts. Stratification and bedding planes are common.
Coarse fragments: 0 to 25 percent; fine to coarse gravels; indurated well-rounded quartzite, feldspar, ironstone, and sandstone
Identifiable calcium carbonate: 0 to 3 percent; very fine or fine; films, filaments, masses, nodules or finely disseminated carbonate
Calcium carbonate equivalent: 0 to 4 percent
Effervescence: none to violent
Reaction (pH): slightly alkaline to moderately alkaline (7.4-8.4)

COMPETING SERIES: There are no competing series. Similar soils include the Dalupe(TX), Hawley(OK), Westola(OK), and Yahola(OK) soils.
Dalupe soils: have a cooler mesic soil temperature regime
Hawley, Westola, and Yahola soils: are moist in the soil moisture control section for longer periods

GEOGRAPHIC SETTING:
Parent material: sandy and loamy alluvium of Holocene age
Landscape: dissected high plains or river valley
Landform: floodplains
Slope: 0 to 2 percent
Mean annual precipitation: 382 to 660 mm (15 to 26 in)
Thornthwaite annual P-E Index Values: 25 to 36
Mean annual air temperature: 13.3 to 16.1 degrees C (56 to 61 degrees F)
Frost-free period: 180 to 210 days
Elevation: 579.1 to 1402.1 m (1900 to 4600 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bippus, Krier, Persimmon, Sprone, Sweetwater, Touzalin, and Wespur series on similar landscape positions.

Bippus, Sprone, and Wespur soils: have a mollic epipedon, and a fine-loamy particle size control section
Krier soils: have a sandy particle-size class, seasonal endosaturation within 30 to 91 cm (12 to 36 in) of the soil surface, and a slightly to moderately saline loamy surface layer
Persimmon soils: have seasonal endosaturation within 100 cm (40 in) of the soil surface
Sweetwater soils: have a mollic epipedon, a fine-loamy over sandy strongly contrasting particle-size class; and endosaturation within 100 cm (40 in) of the soil surface
Touzalin soils: have a sandy particle-size class, and seasonal endosaturation within 100 cm (40 in) of soil surface

DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderately rapid
Runoff: negligible on 0 to 2 percent slopes
Flooding: frequent to rare; extremely brief to very brief duration during the spring and summer months

USE AND VEGETATION:
Major use: livestock grazing and cropland
Native vegetation: Climax state is dominated by tall and mid-grasses of switchgrass, Indiangrass, little bluestem, sideouts grama, sand bluestem, and blue grama. Sand sagebrush is the major shrub species along with small amounts of yucca, Chickasaw sandplum, and skunkbush sumac. Cottonwood is the most prevalent tree species.
Crops: wheat, grain sorghum, and forage sorghum.
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: Sandy Bottomland 16-24" PZ (R077EY065TX)

DISTRIBUTION AND EXTENT:
General area: Southwest Kansas, Northwest Oklahoma, and the Oklahoma and Texas panhandles
Land Resource Region: H - Central Great Plains Winter Wheat and Range Region Sunray
MLRA 77E - Southern High Plains, Breaks
Extent: extensive

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Victoria County, Texas; l927.

REMARKS:

Series revised and taxonomic subgroup changed to Torrifluventic Haplustepts from Fluventic Haplustepts, 2023. Range in characteristics and OSD format were updated.

Diagnostic horizons and features recognized in this pedon:
Ochric epipedon: 0 to 30 cm (0 to 12 in) (Ap and A horizons)
Cambic horizon: 30 to 97 cm (12 to 38 in) (Bw, Bk1, and Bk2 horizons)
Secondary carbonates: 63 to 97 cm (Bk1 and Bk2 horizons)

Note: Not every profile has both Bw and Bk horizons. Some pedons may only have Bw horizons and some may only have Bk horizons.

Pedon ID: P1974TX211006

ADDITIONAL DATA: KSSL data available: S2011OK007003 (Beaver County, OK)

Taxonomic Version: Keys to Soil Taxonomy, Thirteenth Edition, 2022.

National Cooperative Soil Survey
U.S.A.