LOCATION BAGNESS OR+CA

Established Series
Rev. MHF/CDJ/RWL/ET/MLB
01/2013

BAGNESS SERIES

The Bagness series consists of very deep, well drained soils that formed in alluvium derived from mixed sources. Bagness soils are on flood plains and alluvial fans. Slopes are 0 to 3 percent. The mean annual precipitation is about 2030 millimeters (80 inches) and mean annual temperature is about 12 degrees C (54 degrees F).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, isomesic Cumulic Humudepts

TYPICAL PEDON: Bagness silt loam, seeded pasture, on a 1 percent slope at 8 meters (25 feet elevation). (Colors are for moist soil unless otherwise noted.)

Ap--0 to 20 centimeters (0 to 8 inches); very dark grayish brown (10YR 3/2) silt loam, dark grayish brown (10YR 4/2) dry; moderate medium subangular blocky structure parting to moderate fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; many fine irregular pores; very strongly acid (pH 5.0); clear smooth boundary. (15 to 25 centimeters thick)

BA--20 to 61 centimeters (8 to 24 inches); very dark grayish brown (10YR 3/2) clay loam, grayish brown (10YR 5/2) dry; moderate medium subangular blocky structure parting to moderate fine granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many fine continuous tubular pores; very strongly acid (pH 5.0); gradual wavy boundary. (36 to 50 centimeters thick)

Bw--61 to 122 centimeters (24 to 48 inches); dark grayish brown (10YR 4/2) clay loam, grayish brown (10YR 5/2) dry; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine roots; many fine continuous tubular pores; moderately acid (pH 5.8); gradual wavy boundary. (50 to 76 centimeters thick)

C--122 to 152 centimeters (48 to 60 inches); dark grayish brown (10YR 4/2) clay loam, light brownish gray (10YR 6/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; common fine discontinuous tubular pores; 10 percent gravel; moderately acid (pH 6.0).

TYPE LOCATION: Curry County, Oregon; about 302 meters (990 feet south) and 704 meters (2310 feet) west of the northeast corner of section 25, T. 41 S., R. 13 W. (Latitude 42 degrees, 00 minutes, 04 seconds N, Longitude 124 degrees, 11 minutes, 24 seconds W)

RANGE IN CHARACTERISTICS:

Soil temperature: The mean annual soil temperature is 12 to 15 degrees C (54 to 59 degrees F). The difference between the mean winter and mean summer soil temperatures varies from 3 to 6 degrees C. The soils have an isomesic temperature regime.

Soil moisture: The soils are usually moist and are dry for less than 45 consecutive days in all parts between depths of 10 to 30 centimeters (4 and 12 inches) in the four months following the summer solstice. The soils have an udic moisture regime.

Umbric epipedon is 50 to 76 centimeters (20 to 30 inches) thick.
Stratified layers of loamy fine sand to silt loam occur in some pedons below 100 centimeters 40 inches.

Base Saturation, by ammonium acetate, is less than 60 percent between depths of 25 to 75 centimeters.

The particle-size control section (weighted average)

Rock fragments: 0 to 15 percent
Clay content: 20 to 35 percent

A horizon

Hue: 10YR.
Value: 3 or 4 dry, 2 or 3 moist.
Chroma: 1 or 2 dry and moist.

Texture of fine earth: very fine sandy loam or silt loam.
Rock fragments: 0 to 10 percent
Clay content: 5 to 15 percent.
Reaction: very strongly or strongly acid.
Organic matter is 6 to 10 percent.

Bw horizon

Hue: 10YR.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2 dry and moist.

Texture of fine earth: loam, silty clay loam or clay loam.
Rock fragments: 0 to 15 percent
Clay content: 25 to 35 percent.
Reaction: strongly or moderately acid.

C horizon

Hue: 10YR or 2.5Y.
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 2 through 4 dry and moist.

Texture of fine earth: loam, silty clay loam or clay loam.
Rock fragments: 0 to 15 percent
Clay content: 20 to 30 percent.
Reaction: strongly or moderately acid.

COMPETING SERIES: There are no competing series at this time.

GEOGRAPHIC SETTING: Bagness soils are on flood plains. Slopes are 0 to 3 percent. The soils formed in alluvium derived from mixed sources. Elevations are 0 to 33 meters (0 to 100 feet). The climate is humid, characterized by warm wet winters and warm moist summers with fog. A strong marine influence limits the diurnal and annual range of temperature. The mean annual temperature is 11 to 14 degrees C (52 to 57 degrees F). The mean annual precipitation is 1778 to 2286 millimeters (70 to 90 inches). The frost-free period is 270 to 330 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bayside, Bigriver, Ettersburg, and Pistolriver soils. Bayside and Bigriver soils do not have cambic horizons. Bayside soils are somewhat poorly drained. Ettersburg soils have regularly decreasing organic carbon and a rare flooding hazard. Pistolriver soils have contrasting textures at depths of 50 to 76 centimeters (20 to 30 inches) and are somewhat poorly drained..

DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability. These soils are subject to occasional periods of flooding for brief durations from November through April.

USE AND VEGETATION: The soils are used mainly for pasture. Native vegetation is Douglas fir, redwood, grand fir, California laurel, red alder, willow, bigleaf maple, and salmonberry.

DISTRIBUTION AND EXTENT: Coastal Redwood Belts; MLRA 4B The series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED: Curry County, Oregon, 1995. The source of the name is an old ferry crossing on the lower Rogue River in Curry County.

REMARKS: Formerly classified with the 10th edition as fine-loamy, mixed, superactive, isomesic Fluventic Humic Dystrudepts.

Diagnostic horizons and features in this pedon include:

Umbric epipedon - from the surface to 61 centimeters (24 inches) (Ap and BA horizons).
Cambic horizon - from a depth of 61 to 122 centimeters (24 to 48 inches) (Bw horizon).
Cumulic subgroup - organic carbon decreases irregularly with depth to the base of the cambic horizon.

Particle-size control section - from 25 to 100 centimeters (10 to 40 inches) (parts of BA and Bw horizons).

Soil classified using the 11th Edition of the Keys to Soil Taxonomy.

National Cooperative Soil Survey
U.S.A.