LOCATION DUNEY AK
Established Series
SAS/TJR/SJN
02/2022
DUNEY SERIES
The Duney series consists of very deep, well drained soils formed in loamy eolian deposits over eolian sands on rises of plains. Slopes range from 0 to 12 percent. The mean annual precipitation is about 620 millimeters and the mean annual air temperature is about 0.5 degrees C.
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, isotic over mixed Typic Haplocryods
TYPICAL PEDON: Duney highly organic silt loam, located on a plain rise with a slope of 5 percent and elevation of 24 meters; when described on July 20th, 2010 the soil was moist throughout (Colors are for moist soil unless otherwise noted)
Oe--0 to 8 centimeters; moderately decomposed plant material; common fine roots, common medium roots, many coarse roots, and many very fine roots; extremely acid, pH 3.7; clear smooth boundary
A--8 to 11 centimeters; 30 percent brown (7.5YR 4/2) and 70 percent dark brown (7.5YR 3/2) highly organic silt loam; 30 percent sand; 64 percent silt; 6 percent clay; weak medium granular structure; very friable, nonsticky, nonplastic; common fine roots and common very fine roots; extremely acid, pH 3.7; clear wavy boundary
Bhs--11 to 18 centimeters; very dark brown (7.5YR 2.5/2) medial highly organic silt loam; 30 percent sand; 64 percent silt; 6 percent clay; weak fine subangular blocky structure; very friable, nonsticky, nonplastic; common fine roots, common medium roots, and common very fine roots; extremely acid, pH 4.4; clear smooth boundary
2Bs--18 to 47 centimeters; 10 percent brown (7.5YR 4/2) and 90 percent dark brown (7.5YR 3/4) fine sandy loam; 60 percent sand; 35 percent silt; 5 percent clay; weak medium subangular blocky structure; very friable, nonsticky, nonplastic; few medium roots; moderately acid, pH 5.7; clear smooth boundary
2C--47 to 183 centimeters; very dark grayish brown (2.5Y 3/2) fine sand; 90 percent sand; 7 percent silt; 3 percent clay; massive structure; very friable, nonsticky, nonplastic; moderately acid, pH 5.9
TYPE LOCATION: Dillingham Census Area, Alaska; 5 kilometers north-northwest of Dillingham; 59.0838889 degrees north latitude and 158.4941667 degrees west longitude.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 0.5 to 1.7 degrees C (cryic soil temperature regime)
Soil moisture control section - Dry less than 45 consecutive days from June to October (udic soil moisture regime)
Thickness of spodic horizon - 31 to 41 cm
Thickness of andic soil properties - 3 to 7 cm
All mineral horizons-
Reaction - 3.7 to 5.9
Volcanic glass content - 0 to 21 percent
Ammonium oxalate extractable Al + 1/2 Fe - 0.22 to 3.57
Moist bulk density - 0.60 to 1.30 g/cc
Particle-size control section-
Clay content - 1 to 7 percent
Rock fragments - 0 percent
Oe horizon
Thickness - 2 to 8 cm
A horizon
Hue - 7.5YR
Value - 3 or 4
Chroma - 2
Fine earth texture - Highly organic silt loam
Clay content - 4 to 8 percent
Reaction - 3.5 to 5.0
Rock fragments - 0 percent
Thickness - 3 to 14 cm
Bhs or Bs1 horizon
Hue - 7.5YR
Value - 2.5
Chroma - 2
Fine earth texture - Medial highly organic silt loam or medial silt loam
Clay content - 4 to 8 percent
Reaction - 4.4 to 4.8
Rock fragments - 0 percent
Thickness - 3 to 7 cm
2Bs horizon
Hue - 7.5YR
Value - 3 or 4
Chroma - 2 to 4
Fine earth texture - Fine sandy loam
Clay content - 4 to 7 percent
Reaction - 4.8 to 5.7
Rock fragments - 0 percent
Thickness - 24 to 34 cm
2C horizon
Hue - 2.5Y
Value - 3
Chroma - 2
Fine earth texture - Fine sand
Clay content - 1 to 5 percent
Reaction - 5.4 to 5.9
Rock fragments - 0 percent
Thickness - 131 to 138 cm
COMPETING SERIES:
Ekvik - 30 to 90 percent slopes formed in gravelly colluvium on river bluffs
GEOGRAPHIC SETTING:
Parent material - Herbaceous organic material over coarse-loamy eolian deposits over eolian sands
Landform - Rises on plains
Slope - 0 to 12 percent
Elevation - 0 to 38 meters
Climate - Cool summers; cold winters, August and September are the wettest months
Mean annual precipitation - 612 to 634 mm
Mean annual air temperature - 0.5 to 0.7 degrees C
Frost free duration - 85 to 140 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Muklung - Aquic conditions within 115 cm, similar landform position
Nushagak - Aquic conditions at surface, plain talfs
Pellernarquq - Aquic conditions at surface, dips and talfs on plains
Kanakanak - Medial over loamy, rises and talfs of plains
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: (Ksat)
Drainage class - Well drained
Saturation in normal years - None
Flooding - None
Ponding - None
Ksat - Moderately high to high in the loamy eolian material, moderately high to very high in the sandy eolian material
USE AND VEGETATION:
Use - Community development, wildlife habitat, recreation, subsistence, and forestry resources
Potential natural vegetation - Boreal forest composed of white spruce, paper birch, spirea, grass, and ferns
DISTRIBUTION AND EXTENT: Bristol Bay Lowlands; MLRA 236; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Nushagak-Mulchatna Watershed Soil Survey, Dillingham Census Area, Alaska, 2019
REMARKS:
Particle-size control section - 33 to 108 cm
Ochric epipedon
Soil moisture regime - Udic
Andic soil properties - Bhs horizon
Spodic Horizon - Bhs and 2Bs horizons
National Cooperative Soil Survey
U.S.A.