LOCATION EIDERDUCK AK
Established Series
MPS/SAS
02/2022
EIDERDUCK SERIES
Landscape--shore complex
Landform--floodplains, depressions
Slope--0 to 1 percent
Parent material--mossy organic material over stratified loamy alluvium
Mean annual precipitation--about 300 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--peraquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy, isotic, euic Terric Sulfihemists
TYPICAL PEDON: Eiderduck peat on a linear, linear depression on a slope of 1 percent at an elevation of 3 m (The soil was wet, nonsatiatied from 0 to 25 cm and wet, satiated throughout the rest of the profile when described on July 12, 2015.)
Oi--0 to 20 cm; peat, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; many very fine, moderately few medium and coarse, and common fine roots throughout; slightly acid (pH 6.4); abrupt smooth boundary
Oe1--20 to 35 cm; mucky peat, reddish yellow (7.5YR 6/6) dry, strong brown (7.5YR 4/6) moist; common very fine, very few medium, and moderately few fine roots throughout; moderately acid (pH 5.8); abrupt smooth boundary
Cg/Oe--35 to 68 cm; stratified silt loam, gray (N 5/), dry, very dark gray (N 3/), moist; structureless massive; very friable, slightly sticky, nonplastic; common very fine, few medium, and common fine roots throughout; neutral (pH 6.6); clear smooth boundary
Oe2--68 to 92 cm; mucky peat, dark gray (N 4/), dry, black (N 2.5/), moist; very few very fine and moderately few fine roots throughout; neutral (pH 6.9); Odor, pH after H2O2=5.7 clear smooth boundary
Cg/Oa--92 to 150 cm; stratified silt loam, gray (N 5/), dry, very dark gray (N 3/), moist; structureless massive; very friable, slightly sticky, nonplastic; neutral (pH 6.9); Odor, pH after H2O2=5.7
TYPE LOCATION: Nome Census Area County, Alaska, latitude 63.8927290 longitude -160.7918530 degrees, datum WGS84 (Coordinates determined with a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0 to 3 degrees C
Soil moisture control section--saturated within 25 cm of the soil surface during much of the growing season
Aquic conditions--throughout the profile
Total thickness of organic soil layers--40 to 70 cm
Total thickness of hemic soil material--25 to 60 cm
Bulk density--greater than 0.1 g/cm3
Depth to sulfidic materials--0 to 100 cm
Particle Size Control Section:
*Clay--1 to 8 percent
Oi horizon
Chroma--2 or 3 moist
Reaction--5.7 to 6.6
Rubbed fiber content--40 to 75 percent
Color value and chroma of sodium pyrophosphate--7/1, 7/2, 8/1, 8/2, 8/3
Thickness--15 to 25cm
Oe1 horizon
Hue--7.5YR or 10YR
Value--2 to 4 moist, 4 to 6 dry
Chroma--3 to 6 moist
Reaction--5.5 to 6.5
Rubbed fiber content--17 to 40 percent
Thickness--5 to 20 cm
Cg/Oe horizon (Cg portion)
Hue--2.5Y or N
Value--2.5 or 3 moist, 4 or 5 dry
Chroma--0 or 1
Fine-earth texture--silt loam, silt
Clay--2 to 8 percent
Sand--10 to 40 percent
Organic carbon--5 to 12 percent
Reaction--6.1 to 6.9
Electrical conductivity--2 to 4 ds/m
Thickness--20 to 40 cm
Oe2 horizon
Value--3 or 4 moist, 5 or 6 dry
Chroma--3 to 6
Reaction--5.8 to 6.9
Rubbed fiber content--17 to 40 percent
Thickness--25 to 45cm
Cg/Oa horizon (Cg portion)
Fine-earth texture--silt loam, silt
Clay--2 to 8 percent
Sand--15 to 40 percent
Organic carbon--1 to 4 percent
Reaction--6.5 to 7.0
Electrical conductivity--2 to 4 ds/m
COMPETING SERIES: none
GEOGRAPHIC SETTING:
*Elevation--0 to 15 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--295 to 305 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Ryanlake--permafrost, no sulfidic materials present
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class-poorly drained
*Saturation during normal years--saturated within 25 cm of the soil surface during the growing season
*Flooding--frequent, brief
*Saturated hydraulic conductivity (Ksat)--moderately high or high in the organic soil horizons, moderately high in the mineral soil horizons
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--American dunegrass, bluegrass, narrowleaf saw-wort, looseflower alpine sedge, arctic daisy, mouse-ear chickweed, silverweed cinquefoil, Alaska bog willow, starwort, Port Clarence Indian paintbrush, sedge, beachhead iris, Lyngbye's sedge, alpine bluegrass, willow, red fescue
DISTRIBUTION AND EXTENT: Nulato Hills-Southern Seward Peninsula Highlands, Alaska; MLRA 240; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Nulato Hills BLM area, Nome Census Area, Alaska; 2021
REMARKS:
Diagnostic horizons and features recognized in this pedon
*Surface tier--zone from 0 to 30 cm
*Subsurface tier--zone from 30 to 90 cm
*Bottom tier--zone from 90 to 130 cm
*Combined thickness of organic layers--49 cm
*Aquic conditions--present throughout the profile
*Fibric soil materials--zone from 0 to 20 cm
*Hemic soil materials--zone from 20 to 92 cm
*Sapric soil materials--zone from 92 to 150 cm
*Reduced matrix color--zone from 35 to 68 cm and 92 to 150 cm
*Sulfidic materials- zone from 68 to 150 cm
National Cooperative Soil Survey
U.S.A.