LOCATION JIMMERFIELD WY
Tentative Series
IRD. DEW/JCK
02/2017
JIMMERFIELD SERIES
The Jimmerfield series consist of very deep, moderately well drained soils that formed in alluvium. These soils are on stream terraces and alluvial fans. Slopes are 0 to 8 percent. Mean annual precipitation is about 309 mm, and mean annual air temperature is about 7 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquic Haplargids
TYPICAL PEDON: Jimmerfield sandy clay loam, 2 percent slope in cropland at an elevation of 1,501 meters (colors are for dry soil unless otherwise noted).
Ap1--0 to 5 cm; light brown (7.5YR 6/3) sandy clay loam, brown (7.5YR 4/3) moist; weak medium granular structure; soft, very friable, slightly sticky and slightly plastic; common very fine and fine roots throughout; slightly effervescent; slightly alkaline (pH 7.8); gradual smooth boundary.
Ap2--5 to 30 cm; light brown (7.5YR 6/3) sandy clay loam, brown (7.5YR 4/3) moist; weak medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common very fine and few fine roots throughout; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary. (combined thickness of the A horizons is 18 to 35 cm)
Btk1--30 to 43 cm; light reddish brown (5YR 6/4) sandy clay loam; reddish brown (5YR 5/4) moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few very fine roots throughout, few very fine dendritic tubular pores; 10 percent prominent clay films on all faces of peds; finely disseminated carbonates and 3 percent fine moist threadlike calcium carbonate masses in the matrix; 10 percent fine 10YR 3/1 manganese masses, 10 percent fine 7.5YR 5/6 oxidized iron masses, 15 percent fine 10YR 7/2 iron depletions; slightly effervescent; moderately alkaline (pH 8.1); gradual wavy boundary.
Btk2--43 to 62 cm; light reddish brown (5YR 6/4) sandy clay loam; reddish brown (5YR 5/4) moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few very fine roots throughout, few very fine dendritic tubular pores; 2 percent distinct clay films on all faces of peds; finely disseminated carbonates and 5 percent fine moist threadlike calcium carbonate masses in the matrix; 10 percent fine 10YR 3/1manganese masses, 10 percent fine 7.5YR 5/6 oxidized iron masses, 20 percent fine 10YR 7/2 iron depletions; slightly effervescent; moderately alkaline (pH 8.1); gradual wavy boundary.
Btk3--62 to 110 cm; light brown (7.5YR 6/4) sandy clay loam; brown (7.5YR 5/4) moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few very fine dendritic tubular pores; 5 percent distinct clay films on all faces of peds; finely disseminated carbonates and 2 percent fine moist threadlike calcium carbonate masses in the matrix; 10 percent fine 10YR 3/1 manganese masses, 5 percent fine 7.5YR 5/6 oxidized iron masses, 30 percent fine 10YR 7/1 iron depletions; slightly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary. (combined thickness of the Btk horizons is 40 to 147 cm)
BCk1--110 to 158 cm; light yellowish brown (10YR 6/4) fine sandy loam; yellowish brown (10YR 5/4) moist; massive; soft, very friable, slightly sticky and slightly plastic; 2 percent fine moist irregular calcium carbonate masses in the matrix; 10 percent fine 10YR 3/1 manganese masses, 5 percent fine 7.5YR 5/6 oxidized iron masses, 30 percent fine 10YR 7/1 iron depletions; slightly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary. (0 to 50 cm thick)
BCk2--158 to 200 cm; light reddish brown (5YR 6/4) sandy loam; reddish brown (5YR 5/4) moist; massive; soft, very friable, slightly sticky and slightly plastic; 2 percent fine moist irregular calcium carbonate masses in the matrix; 5 percent fine 10YR 3/1 manganese masses, 5 percent fine 7.5YR 5/6 oxidized iron masses, 40 percent fine 10YR 7/1 iron depletions; slightly effervescent; moderately alkaline (pH 8.0).
TYPE LOCATION: Park County, Wyoming; 661 meters south and 128 meters west of the northeast corner of section 29, T. 51 N., R. 98W.; Sheets Flat USGS quadrangle; latitude 44 degrees 21 minutes 55.62 seconds N. and longitude 108 degrees 39 minutes 21.65 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 8 to 10 degrees C
Depth to seasonal high water table - 90 to 180 cm
Rock fragments - 0 to 15 percent gravel
Note: where cultivated, saturation is, in part, from intensive flood irrigation.
A horizons
Hue: 2.5YR to 7.5YR
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 2, 3 or 4
Texture: loam, sandy clay loam, or clay loam
Clay content: 18 to 30 percent
Rock fragments: 0 to 15 percent gravel
Electrical conductivity: 2 to 8 mmhos/cm
Reaction: 7.6 to 8.2
Btk horizons
Hue: 2.5YR to 7.5YR
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 3, 4 or 6
Texture: sandy clay loam, loam or clay loam
Clay content: 20 to 35 percent
Rock fragments: 0 to 15 percent gravel
Calcium carbonate equivalent: 5 to 15 percent
Electrical conductivity: 2 to 8 mmhos/cm
Reaction: 7.8 to 8.2
BCk horizons
Hue: 2.5YR to 10YR
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 4 or 6
Texture: sandy loam, fine sandy loam, loam, sandy clay loam or clay loam
Clay content: 18 to 30 percent
Rock fragments: 0 to 15 percent gravel
Calcium carbonate equivalent: 5 to 10 percent
Electrical conductivity: 2 to 8 mmhos/cm
Reaction: 7.8 to 8.2
Some pedons have a Bt horizon above the Btk and some pedons have a Bk horizon in place of the BCk.
COMPETING SERIES:
Manzanar (CA) - have horizons of strong gleying; have a lithologic discontinuity
Roachgulch (WY) - do not have horizons of secondary calcium carbonate accumulation; do not have hues redder than 7.5YR
Sheetsflat (WY) - do not have horizons of secondary calcium carbonate accumulation in the surface mantle; do not have hues redder than 7.5YR
Snydersditch (WY) - have less than 18 percent clay in the lower part of the subsoil; do not have hues redder than 7.5YR
GEOGRAPHIC SETTING:
Landform - stream terraces and alluvial fans
Elevation - 1,085 to 1,500 meters
Slope - 0 to 8 percent slopes
Parent material - alluvium
Mean annual precipitation - 254 to 356 mm
Mean annual air temperature - 6 to 8 degrees C
Frost-free period - 110 to 150 days
GEOGRAPHICALLY ASSOCIATED SOILS: None
DRAINAGE AND PERMEABILITY: Moderately well drained; moderate to moderately rapid permeability.
USE AND VEGETATION: Jimmerfield soils are used mainly for irrigated alfalfa and grass hay.
DISTRIBUTION AND EXTENT: Jimmerfield soils are of small extent in northwest Wyoming. MLRA 32.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Park County, Wyoming; 2016. The name is taken from a local irrigation canal.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from 0 to 30 cm (Ap1 and Ap2 horizons)
Argillic horizon - from 30 to 110 cm (Btk1, Btk2 and Btk3 horizons)
Secondary carbonates - from 30 to 200 cm (Btk1, Btk2, Btk3, BCk1 and BCk2 horizons)
Redoximorphic concentrations - from 30 to 200 cm (Btk1, Btk2, Btk3, BCk1 and BCk2 horizons)
Redoximorphic depletions - from 30 to 200 cm (Btk1, Btk2, Btk3, BCk1 and BCk2 horizons)
Particle-size control section - from 30 to 80 cm (Btk1, Btk2 and part of the Btk3 horizon)
Jimmerfield soils have a mesic temperature regime and an aridic moisture regime bordering on ustic.
National Cooperative Soil Survey
U.S.A.