LOCATION BANKARD CO KS MT NE NM SD WY
Established Series
Rev. LAN
05/2014
BANKARD SERIES
The Bankard series consists of very deep, excessively to somewhat excessively drained soils that formed in sandy alluvium from mixed sources. Bankard soils are on flood plains and low terraces. Slopes range from 0 to 6 percent. The mean annual precipitation is about 305 millimeters (12 inches) and the mean annual temperature is about 10 degrees C (50 degrees F).
TAXONOMIC CLASS: Sandy, mixed, mesic Ustic Torrifluvents
TYPICAL PEDON: Bankard sand on a north facing 0.5 percent slope in grassland at an elevation of 1,201 meters (3,940 feet). (Colors are for dry soil unless otherwise stated.)
A--0 to 5 centimeters (0 to 2 inches); yellowish brown (10YR 5/4) sand, brown (10YR 4/3), moist; weak fine granular structure; very friable, soft, nonsticky, nonplastic; slightly effervescence, 2 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); abrupt smooth boundary. (5 to 20 centimeters (2 to 8 inches) thick)
Bw1--5 to 30 centimeters (2 to 12 inches); yellowish brown (10YR 5/4) sand, brown (10YR 4/3), moist; weak medium platy structure; very friable, soft, nonsticky, nonplastic; slight effervescence, 1 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); gradual wavy boundary. (10 to 33 centimeters (4 to 13 inches) thick)
Bw2--30 to 72 centimeters (12 to 28 inches); yellowish brown (10YR 5/4) loamy sand, brown (10YR 4/3), moist; 15 percent fine distinct irregular yellowish brown (10YR 5/6) relict masses of oxidized iron; weak medium subangular blocky structure; very friable, soft, nonsticky, nonplastic; slight effervescence, 2 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); clear wavy boundary.
C--72 to 200 centimeters (28 to 80 inches); yellowish brown (10YR 5/4) stratified clay loam to sand, brown (10YR 4/3), moist; single grain; friable, slightly hard, slightly sticky, slightly plastic; slight effervescence, 3 percent calcium carbonate equivalent; moderately alkaline (pH 8.0).
TYPE LOCATION: Bent County, Colorado; about 9.7 kilometers (6 miles) south and 4.8 kilometers (3 miles) west of Las Animas, Colorado on the Purgatoire River in Bent County, Colorado; about 701 meters (2,300 feet) east and 396 meters (1,300 feet north) of the southwest corner of sec. 5, T. 24 S., R. 52 W.; Hackamore Ranch, Colorado USGS quadrangle; UTM zone 13, 652547 E, 4205650 N; latitude 37 degrees, 59 minutes, 8.5 seconds N. and longitude 103 degrees, 15 minutes, 46.5 seconds W.; NAD 83.
RANGE IN CHARACTERISTICS:
Moisture control section: moist in some or all parts for as long as 60 consecutive days when the soil temperature at 50 centimeters (20 inches) is 5 degrees C (41 degrees F)., which occurs in April. Moist March through May, intermittently moist June through October.
Moisture regime: aridic bordering on ustic
Mean annual soil temperature: 8 to 12 degrees C (47 to 54 degrees F.)
Mean annual summer soil temperature: 16 to 26 degrees C (60 to 78 degrees F.)
Depth to carbonates: 0 to 20 centimeters (0 to 8 inches)
Calcium carbonate equivalent: 1 to 5 percent
Organic carbon: decreases irregularly with depth
Particle size control section (weighted average)
Clay content: 1 to 10 percent
Sand content: 80 to 95 percent
Rock fragments: 0 to 15 percent by volume - typically less than 5 percent
Textures are often stratified with lenses of loam and sandy loam. Relict redoximorphic concentrations are present in some pedons and are associated with stratification and differing textures.
A horizon:
Hue: 5YR to 2.5Y
Value: 5 to 6 dry, 3 to 5 moist
Chroma: 2 to 6
Texture: loamy sand, sand, loam
Clay content: 1 to 27 percent
Rock fragment content: 0 to 5 percent
Organic carbon: 0.5 to 1.5 percent
Calcium carbonate equivalent:1 to 5 percent
Reaction: slightly alkaline or moderately alkaline
AC horizon: (where present)
Hue: 7.5YR or 10YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 2 through 6
Texture: loamy sand, sand, fine sandy loam
Clay content: 1 to 18 percent
Rock fragment content: 0 to 5 percent
Organic carbon: 0.5 to 1 percent
Calcium carbonate equivalent: 0 to 5 percent
Reaction: slightly alkaline or moderately alkaline
Bw1 horizon: (where present)
Hue: 7.5YR to 2.5Y
Value: 5 to 6 dry, 4 or 5 moist
Chroma: 3 to 6
Texture: loamy sand, sand, fine sandy loam
Clay content: 1 to 18 percent
Rock fragment content: 0 to 5 percent
Organic carbon: 0.5 to 1 percent
Calcium carbonate equivalent: 1 to 5 percent
Reaction: slightly alkaline or moderately alkaline
Bw2 horizon(s):
Hue: 5YR to 2.5Y
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 2 to 4
Texture: loamy sand, sand, loamy fine sand
Clay content: 0 to 10 percent
Rock fragment content: 0 to 15 percent
Organic carbon: 0.25 to 1 percent
Calcium carbonate equivalent: 1 to 5 percent
Reaction: slightly alkaline through strongly alkaline
C horizon(s): (BC horizon where present)
Hue: 7.5YR to 2.5Y
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 2 to 4
Texture: sand stratified with layers of loamy sand, sandy loam, loam, and clay loam
Clay content: 0 to 10 percent (average)
Organic carbon: 0.25 to 1.5 percent
Calcium carbonate equivalent: 1 to 5 percent
Reaction: slightly alkaline through strongly alkaline
COMPETING SERIES: These are the
Chupe (NM),
Draknab (WY),
Ellicott (CO),
Escavada (NM), and
Kwakina (NM) series.
Chupe soils: averages 15 to 35 percent rock fragments in the control section and are dry in some part of the soil moisture control section in late spring and early summer
Draknab soils: are never moist in some or all parts for as long as 60 consecutive days when the soil at 51 centimeters (20 inches) is 5 degrees C (41 degrees F)or more
Ellicott soils: are noncalcareous in the control section
Escavada soils: are driest from April through June and have a fluctuating water table at depths of 152 to 183 centimeters (5 to 6 feet)
Kwakina soils: are driest from April through June and average 5 to 10 percent calcium carbonate equivalent
GEOGRAPHIC SETTING:
Landscape: river valleys
Landform: flood plains, low terraces
Parent material: stratified, calcareous, recent sandy alluvium
Slopes: 0 to 6 percent
Elevation: 761 to 1,829 meters (2,500 to 6,000 feet)
Mean annual air temperature: 8 to 13 degrees C (47 to 55 degrees F)
Mean annual precipitation: 254 to 432 centimeters (10 to 17 inches)
Peak period: March through August
Driest period: December through February
Frost-free period: 95 to 170 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Craft,
Glenberg, and
Haverson soils.
Craft soils: have a coarse-silty control section
Glenberg soils: have a coarse-loamy control section
Haverson soils: have a fine-loamy control section
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: Excessively to somewhat excessively drained
Saturated hydraulic conductivity: high to very high
Flooding: frequent or occasional, brief flooding April through August
USE AND VEGETATION: These soils are used chiefly as native pastureland and irrigated cropland. Native vegetation consists of riparian habitat of scattered cottonwood, grass and brush. Sandy Bottomland (R069XY031CO) ecological site.
DISTRIBUTION AND EXTENT: The floodplains and low terraces of the major streams and rivers in eastern Colorado, eastern and north-central Wyoming, extreme northeastern New Mexico, southwestern South Dakota, and western Kansas and Nebraska. LRRs G and H; MLRAs 58A, 58B, 60A, 61, 63A, 64, 65, 67A, 67B, 69, and 72. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Red Willow County, Nebraska, 1965.
REMARKS: Diagnostic horizons and features in this pedon are:
Series control section: 0 to 150 centimeters (0 to 59 inches)
Particle size control section: 25 to 100 centimeters (10 to 40 inches).
Ochric epipedon: 0 to 13 centimeters (0 to 6 inches). (A horizon)
Moisture regime: ustic aridic
LAN 7/2013 This update converts English units to metric, updates the range in characteristics section, competing series section, type location section, and drainage. It moves the type location from Morgan County to Bent County, Colorado.
Taxonomic Version: Eleventh Edition, 2010
National Cooperative Soil Survey
U.S.A.