LOCATION DEARYTON WA

Established Series
Rev. NCD/RL/RJS
06/2016

DEARYTON SERIES

The Dearyton series consists of very deep, moderately well drained soils on foothills and uplands. They formed in material weathered from saprolitic gneiss, quartzite, sedimentary lithologies of the Latah formation, and glacial till, mixed with loess and volcanic ash in the upper part. Slopes are 0 to 40 percent. The mean annual precipitation is about 21 inches and the mean annual temperature is about 47 degrees F.

TAXONOMIC CLASS: Fine, isotic, mesic Vitrandic Palexeralfs

TYPICAL PEDON: Dearyton ashy silt loam, on an 8 percent south-facing, convex slope at an elevation of 2,510 feet in a ponderosa pine forest. When described on May 15, 2000, the soil was dry to 12 inches and slightly moist below that depth. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures)

Oi--0 to 1 inches; slightly decomposed plant material. (0 to 1 inch thick)

A--1 to 6 inches; brown (10YR 5/3) ashy silt loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine and few medium roots; common very fine and fine tubular and irregular pores; slightly acid (pH 6.5); clear wavy boundary. (5 to 9 inches thick)

BE--6 to 12 inches; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular and irregular pores; 10 percent silt coats on vertical faces of peds; slightly acid (pH 6.2); abrupt wavy boundary. (6 to 21 inches thick)

2Bt1--12 to 18 inches; brown (7.5YR 4/4) clay loam, brown (7.5YR 4/4) moist; strong coarse prismatic structure; extremely hard, extremely firm, very sticky and very plastic; few very fine and fine roots; few very fine irregular pores; 100 percent prominent clay films on vertical faces of peds; 2 percent fine iron-manganese concretions; 2 percent subrounded gravel; strongly acid (pH 5.5); gradual wavy boundary.

2Bt2--18 to 28 inches; strong brown (7.5YR 4/6) clay loam, strong brown (7.5YR 4/6) moist; strong medium and coarse prismatic structure; extremely hard, extremely firm, very sticky and very plastic; few very fine roots; many very fine irregular pores; 100 percent prominent clay films on vertical faces of peds; 2 percent fine iron-manganese concretions; 2 percent subrounded gravel; slightly acid (pH 6.1); abrupt wavy boundary.

2Bt3--28 to 38 inches; strong brown (7.5YR 4/6) clay loam, brown (7.5YR 4/4) moist; strong medium and coarse prismatic structure; very hard, very firm, very sticky and very plastic; few very fine roots; few very fine and fine irregular pores; 30 percent distinct clay films on vertical faces of peds and 70 percent prominent clay films on vertical faces of peds; 5 percent subrounded gravel; neutral (pH 6.8); 2% fine mica flakes; clear wavy boundary.

2Bt4--38 to 55 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; moderate medium and coarse subangular blocky structure; very hard, very firm, moderately sticky and moderately plastic; few very fine roots; few very fine irregular pores; 5 percent organoargillans and 20 percent clay films on vertical faces of peds; 5 percent subrounded gravel; neutral (pH 7.2); 2% fine mica flakes; clear wavy boundary

2Bt5--55 to 60 inches; strong brown (7.5YR 5/6) gravelly clay loam, strong brown (7.5YR 5/6) moist; moderate coarse subangular blocky structure; very hard, very firm, moderately sticky and moderately plastic; few very fine roots; common very fine irregular pores; 20 percent distinct clay films on vertical faces of peds; 5 percent subrounded paragravel and 25 percent subrounded gravel; slightly alkaline (pH 7.5); 10% fine mica flakes. (Combined thickness of the 2Bt horizons is 35 to more than 60 inches)

TYPE LOCATION: Spokane County, Washington; About one half mile east of Mica, WA; about 1,950 feet north and 2,355 feet east of the southwest corner section 23, Township 24N, Range 44E. USGS Freeman, Wash. Topographic quadrangle; (Latitude 47 degrees, 33 minutes, 22.2 seconds N and Longitude 117 degrees, 12 minutes, 26.6 seconds W), NAD83

RANGE IN CHARACTERISTICS:
Average annual soil temperature - 47 to 52 degrees F.
Moisture control section - dry in all parts between a depth of 4 to 12 inches for 60 to 80 days following the summer solstice, July to September, moist October through June.
Clay content - 35 to 50 percent in the particle size control section
Coarse fragment content - 0 to 20 percent in the particle-size control section
Volcanic ash influence - 7 to 30 inches
Estimated properties of the volcanic ash influenced layers:
Volcanic glass content in the 0.02 to 2 mm fraction - 5 to 20 percent
Acid-oxalate extractable Al plus 1/2 Fe - 0.4 to 1.0 percent
Moist bulk density - 1.15 to 1.35 g/cc
15 bar water retention - 5 to 10 percent for air dried samples

A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3, dry or moist
Reaction - slightly acid or neutral

BE horizon (Bw present in some pedons)
Value - 6 to 8 dry, 3 to 5 moist
Chroma - 1 to 3, dry or moist
Texture - ashy silt loam or ashy loam
Gravel content - 0 to 5 percent gravel
Reaction - slightly acid or neutral

E horizon (present in some pedons)
Thickness - 0 to 1 inch
Hue - 10YR
Value - 6 or 7 dry, 5 or 6 moist
Chroma - 3 dry or moist
Texture - ashy silt loam or ashy loam
Gravel content - 0 to 5 percent gravel
Reaction - moderately acid to neutral

2Bt horizons
Hue - 10YR, 7.5YR or 5YR
Value - 4 to 7 dry, 3 to 5 moist
Chroma - 3 to 6, dry or moist
Texture - silty clay, clay, clay loam, or silty clay loam, with total rock fragment content of 0 to 20 percent in the upper part and 0 to 30 percent in the lower part
Clay content - 35 to 50 percent in the upper part and 32 to 45 percent in the lower part
Gravel content - 0 to 20 percent in the upper part and 0 to 25 percent in the lower part
Paragravel content - 0 to 10 percent
Cobble content - 0 to 20 percent
Reaction - strongly acid to neutral in the upper part and slightly acid to slightly alkaline in the lower part

COMPETING SERIES: There are no competing series. The Hodgson series has a similar classification except for mixed mineralogy and has secondary carbonates at a depth of 14 to 26 inches.

GEOGRAPHIC SETTING: Dearyton soils are on foothills and uplands at elevations of 1900 to 3000 feet. Slopes are 0 to 40 percent. These soils formed in material weathered from saprolitic gneiss, quartzite, and Latah formation and glacial till, mixed with loess and volcanic ash in the upper part. The climate is characterized by warm, relatively dry summers and cool, moist winters. The average annual precipitation is 18 to 25 inches. The average annual air temperature is 46 to 50 degrees F. The frost free season is 100 to 135 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kramerhill, Freeman, Glenrose, and Skalan soils. Kramerhill soils are on foothills, fine-loamy and are deep to a paralithic contact. Freeman soils are on loess uplands and are fine-silty. Glenrose soils are on loess uplands and foothills, are fine-loamy, and have mollic epipedons. Skalan soils are on foothills, are loamy skeletal, and are moderately deep to a lithic contact.

DRAINAGE AND PERMEABILITY: Moderately well drained; slow to rapid runoff; slow permeability. There is a perched water table at a depth of 6 to 24 inches from January to April.

USE AND VEGETATION: These soils are used for timber production, small grains, hay and pasture, and grass seed production. Potential natural vegetation is ponderosa pine and occasional scattered Douglas-fir with an understory of common snowberry, woods rose, white spiraea, Saskatoon serviceberry, pinegrass, bluebunch wheatgrass, Idaho fescue, wild strawberry, kinnikinnick, and silky lupine.

DISTRIBUTION AND EXTENT: Northeastern Washington; MLRA 43 and 44. Dearyton soils are of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Spokane County, Washington, 1964.

REMARKS: Diagnostic horizons and features recognized in this pedon include:

Ochric epipedon - the zone from 0 to 12 inches (Oi, A, and BE horizons)

Argillic horizon - the zone from 12 to 60 inches (2Bt1, 2Bt2, 2Bt3, 2Bt4, and 2Bt5)

Vitrandic feature - the zone from 1 to 12 inches (A and BE horizons)

Ultic feature - the zone from 12 to 32 inches having base saturation by sum of cations of less than 75 percent in one or more horizon

Particle-size control section - the zone from 12 to 32 inches (2Bt1, 2Bt2 and part of the 2Bt3 horizons)

The discontinuity in the 2Bt1 horizon represents the where the influence of the saprolitic gneiss, quartzite, Latah formation, and glacial till influence the soil morphology.

Dearyton soils are also mapped in Stevens County, WA, and will need to be further investigated for soil temperature regime as reflected by the local vegetation. The Stevens County modal pedon describes Douglas-fir, western larch, lodgepole pine and grand fir in the potential native vegetation which indicates a frigid soil temperature regime.

Dearyton soils should be further investigated to determine typical mineralogy (isotic vs. mixed).

National Cooperative Soil Survey
U.S.A.