LOCATION DASHIKI                 ID+WY

Established Series
Rev. JD/JAL/KLS
08/2022

DASHIKI SERIES

The Dashiki series consists of very deep and well drained soils on undulating to rolling areas of volcanic plateaus and formed in a mantel of local alluvium derived from tephra and loess over tephra. Slopes are 2 to 12 percent. Dashiki soils have moderately rapid permeability in the upper part and very rapid permeability in the lower part. The mean annual precipitation is about 1300 mm and the mean annual air temperature is about 1 degrees C.

TAXONOMIC CLASS: Ashy, glassy Typic Vitricryands

TYPICAL PEDON: Dashiki silt loam, supporting a lodgepole pine/grouse whortleberry plant community type, woodland; on a slope of 4 percent with a north aspect at 2375 meters elevation. (Colors are for air dry soil unless otherwise noted.)

Oi--0 to 3 cm; forest litter of needles, twigs and leaves; abrupt smooth boundary. (1 to 5 cm thick)

A1--3 to 11 cm; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; moderate very fine granular structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine roots; many very fine irregular pores; trace pebbles and cobbles; strongly acid (pH 5.5); abrupt smooth boundary.

A2--11 to 26 cm; brown (10YR 5/3) silt loam, dark brown (10YR 3/3) moist; moderate fine granular structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine and common coarse and medium roots; many very fine irregular pores; 5 percent pebbles and a trace cobbles; moderately acid (pH 5.7); gradual smooth boundary. (Combined thickness of the A horizons - 8 to 25 cm)

Bw--26 to 82 cm; light yellowish brown (10YR 6/4) gravelly silt loam, dark yellowish brown (10YR 4/4) moist; moderate coarse subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; common very fine and fine roots; many very fine and few fine tubular pores; 15 percent pebbles and a trace of cobbles; moderately acid (pH 5.9); clear wavy boundary. (45 to 85 cm thick)

2BC--82 to 97 cm; light brownish gray (10YR 6/2) gravelly loamy coarse sand, grayish brown (10YR 5/2) moist; massive; slightly hard, very friable, slightly sticky and nonplastic; few very fine roots; many fine irregular pores; 30 percent pebbles, trace cobbles and stones; slightly acid (pH 6.5); clear irregular boundary. (0 to 25 cm thick)

2C--97 to 194 cm; variegated stratified gravelly coarse sand to extremely gravelly coarse sand; single grain; loose; many fine and medium irregular pores; 20 to 80 percent pebbles, 10 percent cobbles, trace stones; slightly acid (pH 6.5).

TYPE LOCATION: Fremont County, Idaho; about 37 km northeast of Ashton, Idaho; about 185 meters east and 60 meters north of the southwest corner of section 33, T. 12 N., R, 45 E.; Lat. 44 degrees, 19 minutes, 12 seconds N; Long. 111 degrees, 8 minutes, 36 seconds W.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 4 degrees C
Mean summer soil temperature--4 to 7 degrees C
Moisture control section--between 30 and 90 cm. The soil is dry in all parts of the moisture control section for less than 30 consecutive days during the four months following the summer solstice.
Thickness of ochric epipedon--8 to 25 cm
Depth of solum--75 to 100 cm
Depth to lithologic discontinuity--70 to 100 cm
Thickness of andic soil properties--71 to 89 cm
Base saturation by ammonium acetate--less than 20 percent
Rock fragments--dominantly obsidian lithology

O horizon
Form--commonly forest litter of needles, twigs and leaves on lightly or undisturbed pedons
On pedons where recent, heavy mechanical disturbance has occurred a root mat of elk sedge is common.

A horizons
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 to 4 dry or moist
Acid oxalate extractable Al plus 1/2 Fe--0.4 to 1.5 percent
Bulk density--0.90 to 1.10 g/cc
Phosphate retention--40 to 70 percent
15-bar water retention on air dried samples--4 to 10 percent
Volcanic glass content--30 to 75 percent in the 0.02 to 2.0 mm size fraction
Reaction--pH 5.1 to 6.0

Bw horizon
Value--5 or 6 dry, 3 or 4 moist
Chroma--3 to 6 dry or moist
Texture--loam, silt loam
Rock fragment content--5 to 35 percent total; pebbles--5 to 30 percent; cobbles--0 to 5 percent; stones or boulders--0 to 5 percent
Acid oxalate extractable Al plus 1/2 Fe--0.4 to 1.5 percent
Bulk density--1.10 to 1.30 g/cc
Phosphate retention--40 to 70 percent
15-bar water retention on air dried samples--4 to 10 percent
Volcanic glass content--30 to 75 percent in the 0.02 to 2.0 mm size fraction
Reaction--pH 5.1 to 6.0

2BC horizon (when present)
Hue--variegated, 2.5Y or 10YR
Value--6 or 7 dry, 5 or 6 moist
Chroma--2 or 3 dry or moist
Rock fragment content--15 to 60 percent total; pebbles--15 to 50 percent; cobbles--0 to 5 percent; stones or boulders--0 to 5 percent
Acid oxalate extractable Al plus 1/2 Fe--less than 0.4 percent
Bulk density--1.4 to 1.6 g/cc
Phosphate retention--35 to 60 percent
Volcanic glass content--greater than 50 percent in the 0.02 to 2.0 mm size fraction
Reaction--pH 5.1 to 6.0

2C horizon
Rock fragment content--15 to 90 percent total; pebbles--10 to 90 percent; cobbles--0 to 10 percent; stones or boulders--0 to 5 percent
Acid oxalate extractable Al plus 1/2 Fe--less than 0.4 percent
Bulk density--1.4 to 1.6 g/cc
Volcanic glass content--greater than 85 percent in the 0.02 to 2.0 mm size fraction
Reaction--pH 5.6 to 6.5

COMPETING SERIES: These are the Belrick, Linksterly and Millerpoint series. Belrick soils have 75 to 85 percent volcanic glass and 70 to 90 percent phosphate retention in the zone of andic soil properties. Linksterly soils have umbric epipedons and lack cambic horizons. Millerpoint soils have less than 30 percent volcanic glass and bulk density of .65 to .85 g/cc.

GEOGRAPHIC SETTING:
Landform--volcanic plateaus
Elevation--2200 to 2525 meters
Slopes--2 to 12 percent
Parent material--local alluvium derived from tephra and loess over tephra
Mean annual precipitation--890 to 1700 mm
Mean annual air temperature--0 to 3 degrees C
Frost free period--frost may occur at any time throughout the year

GEOGRAPHICALLY ASSOCIATED SOILS: None listed

DRAINAGE AND PERMEABILITY: Well drained; slow to moderate runoff; moderately rapid permeability in the upper part and very rapid permeability in the lower part.

USE AND VEGETATION: Dashiki soils are used for recreation, woodland and wildlife habitat. These soils commonly support a lodgepole pine/grouse whortleberry community type. Recent clearcut areas of these soils support communities dominated by elk sedge. The potential native vegetation is a subalpine fir/grouse whortleberry plant association, grouse whortleberry phase.

DISTRIBUTION AND EXTENT: Dashiki soils are moderately extensive in southeastern Idaho and northwestern Wyoming; MLRA 43B

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Targhee National Forest, Fremont County, Idaho, 1997

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--3 to 26 cm (A1 and A2 horizons)
Cambic horizon--26 to 82 cm (Bw horizon)
Andic soil properties--3 to 82 cm (A1, A2, and Bw horizons)
Particle-size control section--3 to 100 cm (A1, A2, Bw, 2BC and part of the 2C horizons)

Dashiki soils have a cryic soil temperature regime and a udic soil moisture regime with a typic subclass.

Converted to metric, updated formatting, and O horizons were updated to start at zero. 8/2022

ADDITIONAL DATA: The ochric and cambic horizons were sampled and submitted to the National Soil Survey Laboratory, Lincoln, NE for analysis of andic soil properties. Soil survey sample No. S92ID-043-098. NSSL pedon No. 93P312. Full characterization data (8/26/96), National Soil Survey Laboratory, Lincoln, NE. Client assigned laboratory number: S94ID-043-003; project file numbers 95P-27; Laboratory assigned numbers: pedon 95P-150; Samples: 95P 1030-1034.

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National Cooperative Soil Survey
U.S.A.