LOCATION REGGEAR                 ID+WA

Established Series
Rev. MPK-EMM-BDG
07/2013

REGGEAR SERIES

The Reggear series consists of moderately deep to a fragipan, moderately well-drained soils on mountain slopes or hills on basalt plateaus. They formed in a thin mantle of mixed volcanic ash over loess and reworked loess. Saturated hydraulic conductivity is moderately low or low in the fragipan. Slopes are 2 to 40 percent. The average annual air temperature is about 42 degrees F. and the average annual precipitation is 35 inches.

TAXONOMIC CLASS: Fine-silty, mixed, active, frigid Vitrandic Fraglossudalfs

TYPICAL PEDON: Reggear ashy silt loam, forest, on a northerly convex slope of 3 percent at 3,130 feet elevation. When described on September 1983, the soil was moist above 11 inches and dry below. (Colors are for dry soil unless otherwise stated.)

Oi--0 to 2 inches; undecomposed leaves, needles, and twigs; some partially decomposed litter. (0 to 2 inches thick)

A--2 to 8 inches; brown (7.5YR 5/4) ashy silt loam, dark brown (7.5YR 3/4) moist; moderate fine and medium subangular blocky structure parting to strong fine granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine, medium, and coarse roots; many very fine and fine tubular pores; slightly acid (pH 6.5); clear smooth boundary. (1 to 11 inches thick)

Bw--8 to 13 inches; brown (7.5YR 5/4) ashy silt loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine, medium, and coarse roots; many very fine, common fine, and few medium tubular pores; neutral (pH 6.8); abrupt wavy boundary. (0 to 12 inches thick)

2E--13 to 22 inches; light gray (10YR 7/2) silt loam, yellowish brown (10YR 5/4) moist; weak fine and medium prismatic structure parting to weak medium subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine, and medium and common coarse roots; many very fine and common fine tubular pores; 5 percent of horizon has continuous faint clay films on vertical faces of peds; slightly acid (pH 6.4); clear wavy boundary. (0 to 17 inches thick)

2Bt/E--22 to 31 inches; Bt material: light yellowish brown (10YR 6/4) silt loam, dark yellowish brown (10YR 4/4) moist; E material: light gray (10YR 7/2) silt loam, yellowish brown (10YR 5/4) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; hard, firm, moderately sticky and moderately plastic; many very fine, common fine, and few medium roots; many very fine and fine, few medium tubular pores; continuous prominent clay films lining pores and continuous distinct clay films on faces of peds; thick coats of E material on 60 percent of faces of peds; moderately acid (pH 5.8); abrupt wavy boundary. (0 to 20 inches thick)

2Btx1--31 to 41 inches; very pale brown (10YR 7/4) silt loam, dark yellowish brown (10YR 4/4) moist; moderate coarse prismatic structure parting to moderate medium and coarse subangular blocky; very hard, very firm and brittle, moderately sticky and moderately plastic; roots flattened on faces of peds; many very fine and fine, common medium vesicular and tubular pores; continuous prominent clay films lining pores and continuous distinct clay films on faces of peds; few fine dark organic stains on faces of peds; iron stains on faces of peds between E and B material; E material coatings on faces of prisms; tongues of E material 0.10 to 0.75 inch thick between prisms; very strongly acid (pH 5.0); clear smooth boundary. (6 to 17 inches thick)

2Btx2--41 to 60 inches; light yellowish brown (10YR 6/4) silt loam, dark yellowish brown (10YR 4/4) moist; weak coarse prismatic structure parting to weak coarse subangular blocky; extremely hard, extremely firm, and brittle; slightly sticky and slightly plastic; many very fine and fine, and few medium tubular and vesicular pores; continuous distinct clay films lining pores, continuous faint clay films on faces of peds; few fine dark organic matter stains on faces of peds; very strongly acid (pH 4.5); clear smooth boundary. (7 to 23 inches thick)

2Btxb3--60 to 86 inches; light yellowish brown (10YR 6/4) silt loam, dark yellowish brown (10YR 4/4) moist; weak coarse prismatic structure; extremely hard, extremely firm and brittle, moderately sticky and moderately plastic; many very fine and fine, and common medium tubular and vesicular pores; continuous prominent clay films lining pores, continuous distinct clay films on faces of peds; very thin coatings of E material; very strongly acid (pH 4.8).

TYPE LOCATION: Clearwater County, Idaho; about 1.5 miles north of Weippe, Idaho; about 1,200 feet north and 2,400 feet west, of the southeast corner of Section 3, T. 35 N., R. 4 E. Latitude - 46 degrees, 24 minutes, 5 seconds North; Longitude - 115 degrees, 56 minutes, 28 seconds West; USGS Weippe North Quadrangle.

RANGE IN CHARACTERISTICS:

Soil moisture - usually moist year round, not dry for 45 consecutive days June to October. (udic moisture regime)
Average annual soil temperature - 39 to 46 degrees F.
Average summer soil temperature - 47 to 52 degrees F., with an O horizon (frigid temperature regime)
Depth to fragipan - 20 to 40 inches
Control section - Clay content average - 18 to 26 percent

A horizon
Hue - 7.5YR or 10YR dry or moist
Value - 4 to 6 dry, 2 to 4 moist
Chroma - 2 to 4, dry or moist
Texture - ashy-loam or ashy-silt loam
Clay content - 8 to 23 percent
Rock fragments - 0 to 2 percent gravel
Reaction - 5.2 to 7.3
Volcanic glass content - 5 to 12 percent
Acid oxalate extractable Al + 1/2 Fe - 0.4 to 0.8 percent

Bw, BA, or BE horizon (absent in some pedons)
Hue - 7.5YR or 10YR dry or moist
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 3 to 5 dry, 3 or 4 moist
Clay content - 8 to 25 percent
Rock fragments - 0 to 2 percent gravel
Reaction - 5.2 to 6.8
Volcanic glass content - 8 to 10 percent
Acid oxalate extractable Al + 1/2 Fe - 0.4 to 0.5 percent

2E horizon (absent in some pedons)
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 2 to 4 dry, 2 to 6 moist
Clay content - 8 to 26 percent
Rock fragments - 0 to 2 percent gravel
Reaction - 5.2 to 6.5

2EB (present in some pedons)
E part
Value - 6 or 7 dry, 5 moist
Chroma - 2 or 3 dry, 3 or 4 moist
B part
Value - 4 dry or moist
Chroma - 4 dry or moist
Clay content - 18 to 21 percent
Reaction - 5.2 to 6.3

2Bt/E or E/Bt horizon
B part
Hue - 7.5YR or 10YR moist
Value - B part - 4 to 6 dry
Chroma - 3 to 6 dry or moist
Texture - silt loam or silty clay loam
Clay content - 16 to 33 percent
E part
Hue - 10YR or 2.5Y dry or moist
Value - 6 to 8 dry, 4 to 6 moist
Chroma - 1 to 4 dry, 2 to 4 moist
Texture - silt loam or silty clay loam
Clay content - 10 to 26 percent
Rock fragments - 0 to 10 percent gravel
Reaction - 5.2 to 6.5

2Btx horizons
Hue - 7.5YR or 10YR dry, 5YR to 10YR moist
Value - 4 to 7 dry, 3 to 6 moist
Chroma - 3 to 6 dry or moist
Texture - silt loam, silty clay loam, or clay
Clay content - 19 to 45 percent
Gravel content - 0 to 3 percent
Reaction - 5.1 to 6.5

2Btx3 horizon (absent in some profiles)
Hue - 5YR to 10YR dry or moist
Value - 5 to 7 dry, 3 to 5 moist
Chroma - 4 to 6 dry, 3 to 6 moist
Texture - silty clay loam, clay loam, silt loam or loam
Clay content - 19 to 38 percent
Reaction - 5.2 to 6.0

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: The Reggear soils are on mountain slopes or hills on basalt plateaus. They have elevations of 1,600 to 3,800 feet (488 to 1158 meters) and slopes of 2 to 40 percent. These soils formed in loess and reworked loess with a mixed volcanic ash mantle. The average annual air temperature varies from about 38 degrees to about 45 degrees F. The average annual precipitation is 26 to 45 inches (660 to 1143 mm), and the frost free period is 80 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Carlinton, Cavendish, Grangemont, Kauder, and Wilkins series. Carlinton and Cavendish soils are on south and west facing hills and have xeric moisture regimes. Kauder and Grangemont soils are on similar landscapes and have ash mantles 7 to 13 inches thick. Grangemont soils do not have a fragipan. Wilkins soils are in drainageways and are somewhat poorly drained.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained, Saturated hydraulic conductivity is moderately low or low in the fragipan. A perched water table is present. Typically it occurs at a depth of 22 to 28 inches from December through May, but can occur at a depth of 18 to 34 inches November through July.

USE AND VEGETATION: This soil is used mainly for timber production, livestock grazing, tree nurseries, wildlife habitat, and watershed. The natural vegetation is grand fir, Douglas-fir, oceanspray, snowberry, ninebark, huckleberry, queencup beadlily, myrtle pachystima, and goldthread.

DISTRIBUTION AND EXTENT: North central Idaho and north eastern Washington. MLRAs 9, 43A and 44A. Reggear soils are of moderate extent.

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

SERIES ESTABLISHED: St. Joe Area, Shoshone County, Idaho, 1993.

REMARKS: Type location moved to present location in 1983.

Diagnostic horizons and other features recognized in this pedon:

Ochric epipedon - the zone from 0 to 8 inches (Oi and A horizons)

Vitrandic feature - the zone from 2 to 13 inches (A and Bw horizons)

Oxyaquic feature - the zone from 22 to 31 inches (2Bt/E horizon) having saturation with water for 30 or more cumulative days.

Cambic horizon - the zone from 8 to 13 inches (Bw horizon)

Argillic horizon - the zone from 22 to 86 inches (2Bt/E, 2Btx1, 2Btx2, and 2Btx3 horizons)

Fragipan - the zone from 31 to 86 inches (2Btx1, 2Btx2, and 2Btx3 horizons)

Particle size control section - the zone from 22 to 31 inches (2Bt/E horizon)

Reggear meets the criteria for the Oxyaquic subgroup - having saturation with water in one or more layers above the fragipan for 30 or more cumulative days.

The 2/2009 revision reflects a change in great group from Fragiudalfs to Fraglossudalfs. The colors in the 2Bt/E horizon in the typical pedon meet the criteria for a glossic horizon.

This series needs further MLRA investigation because the colors listed in the range in characteristics cross taxonomic requirements for both Fraglossudalfs and Fragiudalfs. The drainage class of Reggear should also be investigated because as described this series appears to meet the MO-1 guide for somewhat poorly drained.

ADDITIONAL DATA:

Laboratory data are available for this series: Reference sample - S83ID-035-002 (84P107) (this pedon) and S83ID-035-005 (84P112) from Clearwater County, Idaho; 9/83 by NSSL, Lincoln, NE. Partial laboratory data available S91ID- 009-004 (92P0277) from east Benewah County, Idaho; by NSSL, Lincoln, NE. Laboratory data available for a pedon sampled as Reggear but in a coarse-silty family S04ID-057-016 (04N1099) from Latah County, Idaho; by NSSL, Lincoln, NE.

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National Cooperative Soil Survey
U.S.A.