LOCATION ULET                    AK

Established Series
Rev. MJM/DLM
02/2022

ULET SERIES

Depth class: very deep
Drainage class: somewhat poorly drained
Landforms: flood plains
Parent material: sandy and silty alluvium over sandy alluvium
Slope: 0 to 3 percent
Annual precipitation: about 19 inches, 480 mm
Annual temperature: about 28 degrees F.,-2 C
Frost-free period: 115 to 146 days

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid Aquic Cryofluvents

TYPICAL PEDON: Ulet - on a slope of 1 percent at 105 feet, 30 meters elevation. (All colors are for moist soil)

Oe--0 to 2 inches (0 to 4 cm); very dark grayish brown (2.5Y 3/2) slightly decomposed plant material; few very fine and fine and few medium roots; slightly acid (pH6.4); clear smooth boundary. (1 to 6 inches thick, 3 to 16 cm)

A--2 to 5 inches (4 to 14 cm); very dark grayish brown (10YR 3/2) silt loam; weak fine granular structure; friable, nonsticky and slightly plastic; few very fine and fine and few medium roots; 2 mm brown (10YR 4/3) high chroma redox concentrations (approximately 2 percent of horizon); 2 mm dark gray (5Y 4/1) low chroma redox depletions (approximately 3 percent of horizon); neutral (pH 7.0); clear wavy boundary. (2 to 6 inches thick, 5 to 16 cm)

C1--5 to 9 inches (14 to 24 cm); very dark grayish brown (10YR 3/2) stratified sand to very gravelly silt loam; massive; very friable, nonsticky and nonplastic; few medium roots; 55 percent gravel; 2 mm dark gray (5Y 4/1) low chroma redox depletions (approximately 1 percent of horizon); neutral (pH 7.3); abrupt, wavy boundary. (1 to 12 inches thick, 3 to 30 cm)

C2--9 to 55 inches (24 to 140 cm); dark grayish brown (10YR 4/2) stratified silt to fine sand; massive; friable, nonsticky and slightly plastic; 3 percent gravel; 2 mm dark yellowish brown (10YR 4/4) high chroma redox concentrations (approximately 5 percent of horizon); 2 mm dark gray (5Y 4/1) low chroma redox depletions (approximately 20 percent of horizon); neutral (pH 6.7); gradual wavy boundary. (20 to 50 inches thick, 50 to 127 cm)

C3--55 to 60 inches (140 to 152 cm); light olive brown (2.5Y 5/3) stratified gravelly sand to fine sandy; single grain; loose, nonsticky and nonplastic; 25 percent gravel; 2 mm dark yellowish brown (10YR 4/4) high chroma redox concentrations (approximately 10 percent of horizon); 2 mm dark gray (5Y 4/1) low chroma redox depletions (approximately 15 percent of horizon); slightly acid (pH 6.5)

TYPE LOCATION: Western Interior River Area Area, Alaska; Aniak, Alaska; UTM north 6828242 and UTM east 472013, zone 4.

RANGE IN CHARACTERISTICS:

Soil moisture regime: udic
Depth to redoximorphic features: 1 to 10 inches, 3 to 25 cm
Depth to stratified textures and irregular decrease in organic carbon: 3 to 35 inches, 7 to 75 cm

O horizon:
Matrix color: hue of 7.5YR or 10YR; value of 2 or 3; chroma of 1 or 3
Organic matter content: 70 to 90 percent
Reaction class: moderately acid to slightly acid

A horizon:
Matrix color: value of 3 or 4; chroma of 1 or 2
Redoximorphic concentrations: value of 3 or 4
Reaction class: moderately acid to neutral

C1 horizon:
Matrix color: hue of 2.5Y or 5Y; value of 3 or 4; chroma of 1 to 3
Redoximorphic concentrations: hue of 7.5YR or 10YR; and chroma of 3 to 6; redoximorphic depletions: hue of 2.5Y or 5Y; value of 4 or 5
Organic matter content: 0 to 1 percent
Rock fragments: 0 to 60 percent gravel
Reaction class: neutral to moderately alkaline

C2 and C3 horizons:
Matrix color: hue of 2.5Y or 5Y; value of 3 or 4; chroma of 1 to 3
Redoximorphic concentrations: hue of 7.5YR or 10YR; and chroma of 3 to 6; redoximorphic depletions: hue of 2.5Y or 5Y; value of 4 or 5
Organic matter content: 1 to 5 percent
Rock fragments: 0 to 35 percent gravel
Reaction class: strongly acid to neutral

COMPETING SERIES: This Eielson series. Eielson series has visible in the soil profile.

GEOGRAPHIC SETTING:
Depth class: very deep
Drainage class: somewhat poorly drained
Landforms: flood plains
Parent material: sandy and silty alluvium over sandy alluvium
Slope: 0 to 3 percent
Annual precipitation: about 19 inches, 480 mm
Annual temperature: about 28 degrees F.,-2 C
Frost-free period: 115 to 146 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ulesqiirluni and Maqulluq soils. Ulesqiirluni soils are deep silty soils on floodlplains. Maqulluq soils are on sandy terraces and climbing dunes.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained and very low runoff. Saturated hydraulic conductivity is high to very high in the upper part of the soil profile and low in the lower party of the underlying layers.

USE AND VEGETATION: Used for wildlife habitat and watershed. Native vegetation is *.

DISTRIBUTION AND EXTENT: MLRA 238, Yukon-Kuskokwim Coastal Plains, Alaska. The series is of small extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA

SERIES ESTABLISHED: Western Interior Rivers Area, Alaska, 2007

REMARKS: Diagnostic features and horizons recognized in this profile include:
Ochric epipedon: 2 to 5 inches, 4 to 14 cm. (A horizon)
Redoximorphic features: 2 to 60 inches, 4 to 152 cm. (A horizon and C horizons)
Coarse-loamy particle-size control section: 10 to 40 inches, 25 to 102 cm, below the O horizon
Irregular decrease in organic carbon: 5 to 60 inches, 14 to 152 cm. (C horizons)
Temperature regime: cryic
Moisture regime: udic.

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.