LOCATION DEHART                  WA

Established Series
Rev. NCD/RLE/KLS
01/2023

DEHART SERIES

The Dehart series consists of deep, well drained soils that formed in glacial till and colluvium primarily from metamorphic rock. Dehart soils are on mountains with slopes of 5 to 65 percent. Mean annual precipitation is about 460 mm and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Vitrandic Haploxerepts

TYPICAL PEDON: Dehart cobbly loam - woodland. (Colors are for dry soil unless otherwise noted.)

Oe--0 to 3 cm; loose partially decomposed organic litter of ponderosa pine needles, twigs, bark and cones; abrupt smooth boundary. (3 to 5 cm thick)

A--3 to 18 cm; grayish brown (10YR 5/2) cobbly loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium granular structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and medium and few coarse roots; common fine and medium and few coarse pores; 10 percent rounded pebbles and 15 percent rounded cobbles; neutral (pH 7.0); clear wavy boundary. (10 to 20 cm thick)

Bw1--18 to 31 cm; pale brown (10YR 6/3) very cobbly sandy loam, brown (10YR 4/3) moist; weak fine and medium granular structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium and few coarse roots; common medium and few coarse pores; 15 percent rounded pebbles and 25 percent rounded cobbles; neutral (pH 7.0); clear wavy boundary. (10 to 30 cm thick)

Bw2--31 to 79 cm; pale brown (10YR 6/3) extremely stony sandy loam, brown (10YR 5/3) moist; weak fine and medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common fine and medium and few coarse roots; few fine, medium and coarse pores; 10 percent rounded pebbles, 20 percent rounded cobbles, 40 percent stones; neutral (pH 7.0); clear wavy boundary. (38 to 64 cm thick)

C--79 to 155 cm; pale brown (10YR 6/3) extremely stony sandy loam, brown (10YR 5/3) moist; massive; hard, friable, slightly sticky and slightly plastic; few roots; few pores; 10 percent rounded pebbles, 20 percent rounded cobbles, 40 percent stones; neutral (pH 7.0).

TYPE LOCATION: Stevens County, Washington; about 3 km south of Gifford and 3 km east of the Columbia River on Long Road (Deer Creek); about 425 meters south and 490 meters east of northwest corner of sec. 12, T. 32 N., R. 37 E., W.M.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 11 degrees C
The soil is usually moist in all horizons but is dry in all parts between depths of 20 and 60 cm for 75 to 90 consecutive days during summer and fall.
Estimated moist bulk density in the upper 18 to 36 cm--1.45 to 1.55 g/cc
Volcanic glass content--5 to 20 percent
Acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron--0.4 to 1.0 percent
15-bar water retention--5 to 12 percent for air dried samples

Particle-size control section:
Rock fragment content--35 to 70 percent

A horizon
Value--4 through 6 dry
Chroma--2 or 3
Rock fragment content--15 to 35 percent

Bw horizon
Value--5 through 7 dry and 3 through 5 moist
Texture--loam or sandy loam
Rock fragment content--40 to 70 percent gravel, cobbles and stones
Reaction--pH 6.1 to 7.3

C horizon
Hue--10YR, 2.5Y, or 5Y
Value--5 through 7 dry, 3 through 5 moist
Chroma--3 or 4
Texture--loam, sandy loam, loamy fine sand
Rock fragment content--40 to 90 percent gravel, cobbles, and stones
Reaction--pH 6.1 to 7.3

COMPETING SERIES: This is the Macreeing series. Macreeing soils are dry for 60 to 75 consecutive days.

GEOGRAPHIC SETTING:
Landform-convex mountain sides and slopes adjacent to drainages in glaciated regions
Elevation--460 to 1075 meters
Slope--5 to 65 percent
Parent material--medium and coarse textured glacial till and colluvium with a component of loess and volcanic ash in the surface layer
Climate--continental climate with dry, warm summers and cool, moist winters
Mean annual precipitation--380 to 510 mm
Mean annual air temperature--8 to 9 degrees C
Mean seasonal air temperature---4 degrees C in January, 19 degrees C in July
Frost-free--90 to 130 days

GEOGRAPHICALLY ASSOCIATED SOILS: None listed

DRAINAGE AND PERMEABILITY: Well drained; medium to very rapid runoff; moderately rapid permeability.

USE AND VEGETATION: Used primarily for grazeable woodland, some is used for dryland cropland. Vegetation is ponderosa pine and Douglas-fir, with an understory of bluebunch wheatgrass, Saskatoon serviceberry, common snowberry, sagebrush, yarrow, lupine, arrowleaf balsamroot, Idaho fescue, and pinegrass.

DISTRIBUTION AND EXTENT: Dehart soils are moderately extensive in the northeastern mountains of Washington; MLRA 43A

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

SERIES ESTABLISHED: Stevens County, Washington, 1978

REMARKS: Diagnostic horizons and features recognized in this pedon:
Ochric epipedon--3 to 18 cm (A horizon)
Cambic horizon--18 to 79 cm (Bw1 and Bw2 horizons)

The description reflects a change in classification due to Andisols, from loamy-skeletal, mixed, mesic Typic Xerochrepts to loamy-skeletal, mixed, mesic Vitrandic Xerochrepts.

Converted to metric and O horizons were updated to start at zero. Competing series section was not updated. 12/2022

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National Cooperative Soil Survey
U.S.A.