LOCATION BRAGTON OREstablished Series
TAXONOMIC CLASS: Loamy, mixed, euic, isomesic Terric Haplohemists
TYPICAL PEDON: Bragton muck - under native vegetation. (Colors are for moist soil unless otherwise noted).
Oe1--0 to 13 inches; dark brown (7.5YR 3/2) muck, grayish brown (10YR 5/2) dry; about 60 percent identifiable plant parts or fibers unrubbed, 20 percent rubbed; nonsticky and nonplastic; many fine and common very fine roots; many prominent reddish brown (5YR 4/4) and yellowish red (5YR 5/6) stains along root channels, strong odor of sulfur dioxide; moderately acid (pH 6.0); gradual wavy boundary.
Oe2--13 to 25 inches; very dark brown (10YR 2/2) muck, gray (10YR 5/2) dry; about 50 percent identifiable plant parts or fibers unrubbed, 17 percent rubbed; nonsticky and nonplastic; common fine and medium roots; visible flecks of mica, strong odor of sulfur dioxide; neutral (pH 6.6); abrupt wavy boundary. (Combined thickness of the Oe horizon is 15 to 30 inches)
Oa--25 to 38 inches; dark brown (7.5YR 3/2) and very dark grayish brown (10YR 3/2) muck, gray (10YR 5/1) dry; about 10 percent identifiable plant parts unrubbed, 5 percent rubbed; nonsticky and nonplastic; common fine and medium roots; visible flecks of mica, odor of sulfur dioxide; neutral (pH 6.8); abrupt wavy boundary. (5 to 20 inches thick)
2Cg--38 to 60 inches; very dark gray (5Y 3/1) silt loam; massive; very hard, friable, nonsticky and nonplastic; highly micaceous; neutral (pH 7.3).
TYPE LOCATION: Lane County, Oregon; along the Siuslaw River, about 1,800 feet west and 200 feet south from the northwest corner of Section 31, T.18 S., R.11 W.
RANGE IN CHARACTERISTICS: The soil is saturated with water throughout the year and is inundated by tidal action. The mean annual soil temperature is 49 to 53 degrees F. The difference between mean summer and mean winter soil temperature is 3 to 6 degrees F. Depth to the underlying silty material is 20 to 50 inches. The overlying hemic and sapric material is moderately acid to neutral with the most acidic layer at the surface.
The surface tier (0 to 12 inches) consists of hemic material with a rubbed fiber content of 17 to 25 percent by volume. It has over 50 percent organic matter.
The subsurface tier (12 to 36 inches) consists of hemic and sapric material. The rubbed fiber content is 5 to 20 percent by volume. Mineral soil material consisting of stratified fine sandy loam and silt loam, when present, occurs below a depth of 20 inches.
The bottom tier (36 to 52 inches) consists of stratified silt loam and fine sandy loam with 1 to 10 percent organic matter. When present, sapric material with a rubbed fiber content of 5 to 17 percent by volume may extend to a depth of 50 inches.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Bragton soils are in tidal basins and estuaries of major coastal rivers. Slopes are 0 to 2 percent. Elevations are 0 to 6 feet. They formed in decomposed organic material over silty alluvium. The climate is characterized by cool wet winters and cool moist summers. The mean annual temperature is 48 to 52 degrees F. The mean annual precipitation is 70 to 85 inches. The frost free period is 165 to 240 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bergsvik, Brallier, Clatsop, Coquille, Nestucca, and Willanch series. Bergsvik soils are organic soils with a sandy or sandy-skeletal mineral layer and lack the sapric organic layer. Brallier soils lack the mineral soil layer, are very strongly acid and are typically drained. Clatsop soils have a histic epipedon and are fine-silty. Coquille, Nestucca, and Willanch soils are mineral soils. In addition, Coquille and Nestucca soils are fine-silty and Willanch soils are coarse-loamy.
DRAINAGE AND PERMEABILITY: Very poorly drained; moderate permeability. The soils are frequently inundated by tides.
USE AND VEGETATION: These soils are used for wildlife habitat. Vegetation is rushes, sedges and reeds.
DISTRIBUTION AND EXTENT: Coastal estuaries of Oregon; MLRA 1. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Douglas County, Oregon, 1994.
REMARKS: This soil is identified as Brallier Variant in the Lane County Area, Oregon, Soil Survey.
Diagnostic horizons and features recognized in this pedon:
Hemic material from 0 to 25 inches with a rubbed fiber content of 17 and 20 percent and organic matter content of over 50 percent.
Sapric material from 25 to 38 inches with a rubbed fiber content of 5 percent and organic matter content of over 20 percent.
The control section is from 0 to 52 inches.
Hemist-- the upper 13 inches of the subsurface tier is hemic.
Sapric--the lower 11 inches of the subsurface tier is sapric.
Terric--mineral soil material is from 38 to 60 inches.