LOCATION JANKOSH NEEstablished Series
TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, superactive, mesic Aquic Natrustolls
TYPICAL PEDON: Jankosh loam 0 to 2 percent slopes in native grass. (Colors are for dry soil unless otherwise stated.)
A--0 to 2 inches; gray (10YR 5/1) loam; very dark gray (10YR 3/1) moist; weak fine granular structure; slightly hard, friable; slight effervescence; slightly alkaline; sodium adsorption ratio=8; abrupt smooth boundary (1 to 10 inches thick).
E--2 to 4 inches; light brownish gray (10YR 6/2) loam; dark grayish brown (10YR 4/2) moist; weak fine granular structure; slightly hard, friable; slight effervescence; slightly alkaline; sodium adsorption ratio 5; abrupt smooth boundary (1/2 to 4 inches thick).
Btn--4 to 14 inches; grayish brown (10YR 5/2) sandy clay loam; dark grayish dark brown (10YR 3/3) moist; weak medium subangular blocky structure; hard, firm; violent effervescence; very strongly alkaline; sodium adsorption ratio 19; clear smooth boundary.
Bkn1--14 to 18 inches; pale brown (10YR 6/3) loam; brown (10YR 5/3) moist; weak coarse prismatic structure; hard, firm; few fine distinct yellowish brown (10YR 5/6) irregularly shaped masses of iron accumulation with sharp to diffuse boundaries in the matrix; violent effervescence; sodium adsorption ratio=25; very strongly alkaline; clear smooth boundary. (Combined thickness of the Btn horizon is 5 to 24 inches.)
Bkn2--18 to 33 inches; very pale brown (10YR 7/3) very fine sandy loam; pale brown (10YR 6/3) moist; moderate medium prismatic structure; slightly hard, friable; few fine and medium distinct yellowish brown (10YR 5/6) irregularly shaped masses of iron accumulation with sharp to diffuse boundaries in the matrix; sodium adsorption ratio 15; few fine calcium carbonate accumulations; violent effervescence; very strongly alkaline; abrupt wavy boundary. (10 to 20 inches)
2Cg--33 to 80 inches; very pale brown (10YR 8/2) gravelly coarse sand; light gray (10YR 7/2) moist; single grain; loose; 26 percent gravel by volume; neutral.
TYPE LOCATION: Garden County, Nebraska; about .5 mile south and .5 mile west of Oshkosh; 200 feet north and 2575 feet east of the southwest corner of section 35, T. 17 N., R. 44 W. Oshkosh topographic quadrangle; latitude 41 degrees, 23 minutes, 43 seconds North and longitude 102 degrees, 21 minutes, 25 seconds West.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature: 51 to 53 degrees F
Depth to calcium carbonate: carbonates are typically at the surface
Depth to natric horizon: to inches
Depth to redox concentrations: in the lower Btn and Bkn horizons
Depth to endosaturation: 1.5 to 3.0 feet
Thickness of the solum: 20 to 36 inches
Thickness of the mollic: 7 to 20 inches, may extend into the upper Btn horizon
Particle-size control section (weighted average):
Clay content: 10 to 18 percent
Rock fragments: depth to coarse sand or gravelly coarse sand is 24 to 48 inches and averages 36 inches
A horizon:
Hue:10YR
Value: 4 or 5, and 3 or 4 moist
Chroma: 1 or 2
Texture: loam or very fine sandy loam
Clay content: 10 to 18 percent
Calcium carbonate equivalent: 1 to 15 percent
SAR: 0 to 9
Reaction: slightly alkaline or moderately alkaline
E horizon:
Hue:10 YR
Value: 6 or 7, and 4 or 5 moist
Chroma: 6 or 7, and 4 or 5 moist
Texture: loam or very fine sandy loam
Clay content: 10 to 18 percent
Calcium carbonate equivalent: 1 to 15 percent
SAR: 0 to 9
Reaction: slightly alkaline or moderately alkaline
Btn horizon:
Hue: 10 YR
Value: 4 to 6, and 3 or 4 moist
Chroma: 2 or 3
Texture: very fine sandy loam, sandy clay loam, clay loam, or loam
Clay content: 10 to 18 percent
Calcium carbonate equivalent: 5 to 15 percent
SAR: 13 to 30
Reaction: strongly alkaline or very strongly alkaline
Bkn horizon:
Hue: 10 YR
Value: 5 to 7, and 4 or 6 moist
Chroma: 2 or 3
Texture: very fine sandy loam or loam
Clay content: 10 to 18 percent
Calcium carbonate equivalent: 5 to 15 percent
SAR: 13 to 30
Reaction: strongly alkaline or very strongly alkaline
2Cg horizon:
Hue: 10YR
Value: 5 to 7, and 4 to 6 moist
Chroma: 2 or 3
Texture: very fine sandy loam or loam
Rock fragments: 5 to 25 percent gravel by volume
Calcium carbonate equivalent: 0 to 5 percent
SAR: 0 to 6
Reaction: neutral or slightly alkaline
COMPETING SERIES:
There are no other series in the same family.
GEOGRAPHIC SETTING:
Parent material: derived from loamy alluvium deposited 25 to 48 inches deep over sandy and gravelly alluvium
Landform:
Slopes: 0 to 2 percent
Elevation: 3000 to 4000 feet
Mean annual temperature: 49 to 51 degrees F
Mean annual precipitation: 14 to 18 inches
Frost-free period: 130 to 150 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Janise do not have coarse sand or gravelly sand at depths below 20 inches
Lemoyne: are sandy over loamy and are not strongly alkaline
Lewellen: are sandy in the particle size control section
McCuligan: are sandy in the particle size control section, have a higher seasonal high water table and are slightly lower on the landscape
McGrew: are not strongly alkaline
Minatare: are fine textured and have an argillic horizonRushcreek: are deep and moderately alkaline
Platte: have coarce sand and gravelly coarce sand above 20 inches
Yockey: are not strongly alkaline
DRAINAGE AND PERMEABILITY:
Drainage: somewhat poorly drained
Permeability: moderate in the loamy upper part and very rapid in the gravelly lower part
Flooding: rare flooding may occur for brief durations
Runoff: slow
USE AND VEGETATION: Used mainly for range or hayland. Native vegetation is principally alkali sacation, inland saltgrass, western wheatgrass, slender wheatgrass and plains bluegrass.
DISTRIBUTION AND EXTENT: Western Nebraska, and possibly eastern Wyoming and northeastern Colorado. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Garden County, Nebraska, 1994.
REMARKS:
Diagnostic features recognized in this pedon are:
Ochric epipedon: the zone from 0 to 2 inches (A horizon)
Albic horizon: the zone from 2 to 4 inches (E horizon)
Argilic horizon: the zone from 4 to 18 inches (Btn and Bkn horizons)
Aquic soil conditions: the zone from 14 to 33 inches (Bkn horizons)
In areas that are used for cultivated crops the A, E, and the upper Btn horizons have been mixed by plowing.Some pedons have a C horizon that is similar in color and texture to the Bkn horizon. It may be stratified in color and texture. Jankosh soils were previously mapped as Janise, sandy substratum or an alkali phase of the Gering series.