LOCATION BONEDRAW TX
Established Series
AKN-THW-RM
03/2018
BONEDRAW SERIES
The Bonedraw series consists of very deep, well drained, moderately slow permeable soils formed in gravelly clayey alluvium derived from limestone of the Segovia and Fort Terrett Formations. These nearly level to gently sloping soils occur in draws of dissected plateaus. Slope ranges from 0 to 5 percent. Mean annual precipitation is about 787 mm (31 in), and mean annual air temperature is about 18.3 degrees C (65 degrees F).
TAXONOMIC CLASS: Clayey-skeletal, smectitic, thermic Cumulic Haplustolls
TYPICAL PEDON: Bonedraw clay, 1.0 percent slope in rangeland; elevation is 653 m (2142 ft) (Colors are for dry soil unless otherwise stated.)
A--0 to 14 cm, (0 to 6 in); very dark gray (10YR 3/1) clay, black (10YR 2/1), moist; moderate medium subangular blocky parts to moderate fine subangular blocky structure; moderately hard, friable, very sticky, very plastic; common very fine roots throughout and common very coarse roots top of horizon and common medium roots throughout and common fine roots throughout; 8 percent nonflat subrounded indurated 2 to 75 mm limestone fragments; slightly alkaline; very slight effervescence; clear smooth boundary. (Thickness is 7 to 23 cm [3 to 9 in].)
Bw1--14 to 38 cm, (6 to 15 in); very dark gray (10YR 3/1) extremely gravelly clay, black (10YR 2/1), moist; moderate fine subangular blocky structure; slightly hard, friable, very sticky, very plastic; common very fine roots throughout and common medium roots throughout and common fine roots throughout; 25 percent nonflat subrounded indurated 75 to 250 mm limestone fragments and 50 percent nonflat subrounded indurated 2 to 75 mm limestone fragments; slightly alkaline; slight effervescence; clear smooth boundary.
Bw2--38 to 84 cm, (15 to 33 in); dark gray (10YR 4/1) extremely gravelly clay, very dark gray (10YR 3/1), moist; weak fine subangular blocky structure; slightly hard, friable, very sticky, very plastic; common very fine roots throughout and common medium roots throughout and common fine roots throughout; 10 percent nonflat subrounded indurated 250 to 600 mm limestone fragments and 25 percent nonflat subrounded indurated 75 to 250 mm limestone fragments and 45 percent nonflat subrounded indurated 2 to 75 mm limestone fragments; slightly alkaline; slight effervescence; clear smooth boundary.
Bw3--84 to 124 cm (33 to 49 in); brown (7.5YR 5/3) extremely gravelly sandy clay loam, brown (7.5YR 4/3), moist; weak fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; common very fine roots throughout and common fine roots throughout; 5 percent nonflat subrounded indurated 250 to 600 mm limestone fragments and 20 percent nonflat subrounded indurated 75 to 250 mm limestone fragments and 60 percent nonflat subrounded indurated 2 to 75 mm limestone fragments; strong effervescence; slightly alkaline; clear smooth boundary. (Combined thickness is 79 to 127 cm [31 to 50 in].)
C--124 to 160 cm (49 to 63 in); reddish brown (5YR 5/4) extremely gravelly sandy clay loam reddish brown (5YR 4/4), moist; slightly hard, friable, moderately sticky, moderately plastic; common very fine roots throughout and common fine roots throughout; 5 percent nonflat subrounded indurated 250 to 600 mm limestone fragments and 20 percent nonflat subrounded indurated 75 to 250 mm limestone fragments and 60 percent nonflat subrounded indurated 2 to 75 mm limestone fragments; strong effervescence; moderately alkaline.
TYPE LOCATION: Kerr County, TX; From the intersection of Highway 39 and FM 1340 in Hunt, TX, 26.6 miles south/southwest on Highway 39 to ranch road gate, south onto ranch road about 2.4 miles, about 54 feet north of ranch road in rangeland.
USGS topographic quadrangle: Hillcrest Ranch, Texas
Latitude: 29 degrees, 54 minutes, 43.33 seconds N
Longitude: 99 degrees, 39 minutes, 10.68 seconds W
Decimal Degrees
Latitude: 29.9120367
Longitude: -99.6529667
Datum: WGS84
UTM Easting 436966.72 m
UTM Northing 3309217.48 m
UTM Zone 14
RANGE IN CHARACTERISTICS:
The surface is covered by about 5 percent limestone fragments 2 to 75 mm (1/8 to 3 in) in diameter and 15 percent limestone fragments 75 to 250 mm (3 to 10 in) in diameter and 0.01 percent limestone fragments 250 to 600 mm (10 to 24 in) in diameter.
Soil Moisture: Typic ustic soil moisture regime.
Thickness of the mollic epipedon: 51 to 84 cm (20 to 33 in)
Particle-size control section (weighted average)
Clay content: 40 to 55 percent
Rock fragments: 35 to 80 percent
A Horizon
Hue: 7.5YR or 10YR
Value: 2.5 to 4, 2 or 3 moist
Chroma: 1 or 2
Texture: clay loam or clay, or gravelly to extremely gravelly phases
Clay content: 28 to 50 percent
Rock fragments: 1 to 85 percent total; 1 to 85 percent gravel, 0 to 10 percent cobbles; limestone
Electrical conductivity (dS/m): 0 to 2
Effervescence: None to strongly
Reaction (pH): neutral to moderately alkaline (7.0 to 8.4)
Bw Horizon (upper)
Hue: 7.5YR or 10YR
Value: 3 or 4 dry, 2 or 3 moist
Chroma: 1 to 3, dry or moist
Texture: clay, and gravelly to extremely gravelly phases
Clay content: 40 to 55 percent
Rock fragments: 15 to 80 percent total; 15 to 80 percent gravel, 0 to 15 percent cobbles; limestone
Electrical conductivity (dS/m): 0 to 2
Effervescence: None to slightly
Reaction (pH): neutral to moderately alkaline (7.0 to 8.4)
Bw Horizon (lower)
Hue: 7.5YR or 10YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 to 4, dry or moist
Texture: sandy clay loam, clay loam, or clay and very gravelly or extremely gravelly phases
Clay content: 25 to 45 percent
Rock fragments: 35 to 85 percent total; 35 to 80 percent gravel, 0 to 30 percent cobbles, 0 to 10 percent stones; limestone
Electrical conductivity (dS/m): 0 to 2
Effervescence: strongly
Reaction (pH): slightly alkaline to moderately alkaline (7.4 to 8.4)
C Horizon
Hue: 5YR, 7.5YR, or 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 2 to 4, dry or moist
Texture: sandy clay loam or clay loam and extremely gravelly or extremely cobbly phases
Clay content: 25 to 40 percent
Rock fragments: 60 to 90 percent total; 35 to 75 percent gravel, 10 to 30 percent cobbles, 0 to 20 percent stones; limestone
Electrical conductivity (dS/m): 0 to 2
Effervescence: strongly
Reaction (pH): slightly alkaline to moderately alkaline (7.4 to 8.4)
COMPETING SERIES: There are no series in the same family. Similar soils are the
Dev,
Fieldcreek,
Iraan, and
Oakalla series.
Dev soils: have a loamy-skeletal control section and more than 40 percent carbonates
Fieldcreek soils: have a coarse-loamy control section and a superactive cation exchange activity class
Iraan soils: have a fine-silty control section and a superactive cation exchange activity class
Oakalla soils: have a fine-loamy control section and more than 40 percent carbonates
GEOGRAPHIC SETTING:
Parent material: gravelly clayey alluvium derived from limestone
Landscape: Dissected plateaus
Landform: Draw
Slope: 0 to 5 percent
Mean annual precipitation: 660 to 864 mm (26 to 34 in)
Precipitation Pattern: Bimodal rainfall with Mary, April, May, June, September, October, and November being the wettest months.
Thornthwaite P-E Index: 35 to 45
Mean annual air temperature: 17.8 to 19.4 degrees C (64 to 67 degrees F)
Frost-free period: 220 to 240 days
Elevation: 502.9 to 693.4 m (1650 to 2275 ft)
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Eckrant,
Harper,
Krum,
Prade,
Tarpley, and the tentative
Mudgedraw series.
Eckrant,
Harper, and
Tarpley soils: occur on interfluves and side slopes and are shallow to a lithic contact
Krum soils: occur on footslopes and have a calcic horizon
Prade soils: occur on side slopes and are shallow to a petrocalcic horizon
Mudgedraw soils: occur on footslopes and have an argillic horizon
DRAINAGE AND PERMEABILITY:
Drainage class: Well
Permeability class: moderately slow
Runoff: low on slopes less than 1 percent, and medium on 1 to 5 percent slopes
Flooding: occasionally for very brief duration during intense rainfalls during the months of March to June and September to November
USE AND VEGETATION: Used for livestock grazing and wildlife habitat. Native vegetation consists of eastern gamagrass, switchgrass, little bluestem, virginia wildrye, blood ragweed, hairy ruellia, hairy tubetongue, aster, maximilian sunflower, and white crownbeard; with pecan, elm, cypress, oak, walnut, and ash.
DISTRIBUTION AND EXTENT: Land Resource Region I - Southwest Plateaus and Plains Range and Cotton Region; MLRA 81B; the series is of moderate extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas.
SERIES ESTABLISHED: Kerr County, Texas, 2017, Kerr County soil survey area, Texas, 2017. The series was named after a USGS topographic quadrangle named Boneyard Draw.
REMARKS: The series was formerly included in Denton, Krum, and Oakalla series. The series was separated based on a need for a soil for the draw landscape position.
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 25 to 100 cm (10 to 40 in). (Bw1, Bw2, and Bw3 horizons)
Mollic epipedon: 51 to 84 cm (20 to 33 in) (A, Bw1, and Bw2 horizons)
ADDITIONAL DATA: None
Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014
National Cooperative Soil Survey
U.S.A.