LOCATION BELUGA             AK
Established Series
Rev. DLM/DVP/JPM
03/2005

BELUGA SERIES


Depth class: very deep
Drainage class: very poorly or poorly drained
Parent Material: silty and clayey slope alluvium
Landform: alluvial fans
Slope: 0 to 15 percent
Mean annual precipitation: about 24 inches.
Mean annual temperature: about 36 degrees F.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid Typic Cryaquents

TYPICAL PEDON: Beluga silt loam - under forest and grass understory. (All colors for moist soil unless otherwise stated)

Oe-- 0 to 5 inches; dark reddish brown (5YR 2/2) moderately decomposed straw and woody mat with mycelia in the lower part; strongly acid (pH 5.3); abrupt smooth boundary. (2 to 5 inches thick)

A-- 5 to 7 inches; very dark grayish brown (10YR 3/2) silt loam with pockets of dark grayish brown (10YR 4/2); moderate fine granular structure; very friable; common roots; streaks of burned organic matter near bottom of horizon; strongly acid (pH 5.4); abrupt wavy boundary. (2 to 5 inches thick)

C1g-- 7 to 13 inches; dark grayish brown (10YR 4/2) silt loam; moderate fine granular structure; very friable; common roots; moderately acid; common distinct dark yellowish brown (10YR 4/4) redoximorphic concentrations; moderately acid (pH 5.6); abrupt wavy boundary.

C2g-- 13 to 18 inches; dark grayish brown (10YR 4/2) fine sandy loam; weak thin platy structure; very friable; common roots; common large distinct dark yellowish brown (10YR 4/4) redoximorphic concentrations; moderately acid (pH 5.6); abrupt wavy boundary.

C3g-- 18 to 26 inches; gray (5Y 5/1) silt loam; weak fine platy structure; friable, slightly sticky and nonplastic; few roots; thin stratas of fine sandy loam; common medium distinct dark yellowish brown (10YR 4/4) redoximorphic concentrations; moderately acid (pH 5.8); abrupt wavy boundary.

C4g-- 26 to 32 inches; greenish gray (5GY 5/1) fine sandy loam; weak thin platy structure; very friable, nonsticky and nonplastic; few roots; thin layer of gravelly silt loam with red shale fragments; common medium distinct olive brown (2.5Y 4/4) redoximorphic concentrations; moderately acid (pH 5.8); abrupt smooth boundary. (Combined thickness of the Cg horizons is 25 to 38 inches thick)

2Cg-- 32 to 60 inches; gray (5Y 5/1) silty clay loam; massive; firm; few fine pores and vesicles; underlying sediments are layered fine sandy loam, silt loam, and shaly silt loam; common large prominent yellowish brown (10YR 5/6) and dark red (2.5YR 3/6) redoximorphic concentrations; firm dark red decomposing shale fragments; moderately acid.

TYPE LOCATION: Homer-Ninilchik Area, Alaska; SE 1/4, SE 1/4, Section 17, T. 6 S., R. 13 W., Seward Meridian. Approximately 1 mile east of Homer.

RANGE IN CHARACTERISTICS:
Depth to massive, firm underlying material: about 30 inches, ranges from 20 to greater than 40 inches
Thin strata of sand and silty clay loam, and angular fragments of shale and lignite: may occur at any depth
Particle size control section (weighted average): less than 18 percent clay; more than 15 percent fine or coarser sand
Redoximorphic features: normally present throughout the entire profile

A horizon:
Matrix moist color: 10YR to 5Y; value of 2 to 4; chroma of 1 to 4
Texture: silt loam, very fine sandy loam
Reaction class: strongly acid to slightly acid

Cg horizons:
Matrix moist color: hue of 10YR to 5GY; value of 4 or 5, chroma of 1 or 2
Texture: silt loam, very fine sandy loam, silty clay loam, fine sandy loam
Reaction class: moderately acid to neutral

2C horizon massive and firm;
Matrix moist color: hue of 10YR to 5GY; value of 4 or 5, chroma of 1 or 2
Texture: silt loam, very fine sandy loam, silty clay loam, clay loam, fine sandy loam
Reaction class: moderately acid to neutral

COMPETING SERIES: These are the Aquatna, Moose River, Noonku, and Susivar series. Aquatna, Moose River, and Noonku soils do not have firm underlying material within the control section. Susivar soils have a sandy substratum.

GEOGRAPHIC SETTING:
Parent material: silty and clayey slope alluvium
Landform: alluvial fans
Slope: 0 to 15 percent
Climate: maritime with cool summers and long moderately cold winters
Average annual temperature is about 36 degrees F.
Average annual precipitation: about 24 inches

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Salamatof and Mutnala soils. Salamatof soils are organic soils in bogs. Mutnala soils are well drained, have spodic horizons, and occur moraines.

DRAINAGE AND PERMEABILITY: Very poorly or poorly drained, very high runoff, saturated hydraulic conductivity is moderately high to high in upper part of the profile and moderately low in the silty clay loam underlying material. Most areas are influenced by seepage.

USE AND VEGETATION: The native vegetation is bluejoint grass, alder, willow, fireweed, and forbs. Some areas are forested with Sitka spruce and paper birch. Some areas are used for pasture, hay, vegetables, and residential development.

DISTRIBUTION AND EXTENT: MLRA 224 Cook Inlet Lowlands, South-central Alaska. The series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Homer-Ninilchik Area, Alaska. 1966.

REMARKS: Diagnostic horizons and features recognized in this soil include: Saturation with water at some time of the year
Redoximorphic concentrations and depletions within 20 inches of the surface
Assumed sulfidic materials within 20 inches of the surface
Weighted average of coarse-loamy from 10 to 40 inches
Soil Reaction is more than 5.5 (1:1, H20) throughout the control section.
Temperature regime: cryic
Moisture regime: aquic

ADDITIONAL DATA:


National Cooperative Soil Survey
U.S.A.