LOCATION MUDIE AK
Established Series
SAS/TJR/MPR
05/2022
MUDIE SERIES
Landscape--shore complexes
Landform--tidal flats
Slope--0 to 3 percent
Parent material--marine deposits
Mean annual precipitation--about 600 mm
Mean annual air temperature--about 1 degree C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--peraquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-silty, isotic, nonacid Typic Cryaquents
TYPICAL PEDON: Mudie silt loam on a linear tidal flat, on a slope of 1 percent at an elevation of 3 m (The soil was saturated throughout the profile when described on September 18, 2007.)
ACg--0 to 13 cm; silt loam, gray (5Y 6/1) dry, dark gray (5Y 4/1) moist; weak fine subangular blocky structure; soft, friable, slightly sticky and nonplastic; many very fine, fine, and medium roots; neutral (pH 7.3); gradual smooth boundary
Cg1--13 to 29 cm; silt loam, light gray (2.5Y 7/1) dry, gray (2.5Y 5/1) moist; massive; slightly hard, friable slightly sticky and slightly plastic; common very fine, fine, and medium roots; 25 percent medium masses of oxidized iron, strong brown (7.5YR 4/6) moist, clear boundaries; neutral (pH 6.9); gradual smooth boundary
Cg2--29 to 60 cm; silt loam, gray (2.5Y6/1) dry, dark gray (2.5Y 4/1) moist; massive; slightly hard, friable, slightly sticky and nonplastic; 45 percent medium masses of oxidized iron, yellowish red (5YR 4/6) moist, sharp boundaries; neutral (pH 6.8); gradual smooth boundary
Cg3--60 to 180 cm; silt loam, gray (N 5/0) dry, very dark gray (N 3/0) moist; massive; slightly hard, friable, nonsticky and slightly plastic; neutral (pH 6.9)
TYPE LOCATION: Dillingham Census Area, Alaska, in the village of Ekuk; latitude 58.813056 degrees north, longitude 158.5547222 degrees west, datum WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 4 degrees C
Soil moisture control section--saturated in all parts during the growing season (peraquic moisture regime)
Aquic conditions--throughout profile
Reduced matrix--throughout profile
Particle-size control section
*Clay content--3 to 10 percent
*Coarse fragment content--0 to 3 percent
*Particles that have a diameter of 0.1 to 77 mm (fine sand or coarser)--0 to 15 percent
*Sodium fluoride pH--greater than or equal to 8.4
*Ratio of 1500 kPa water to measured clay--greater than or equal to 0.6
ACg horizon
Hue--2.5Y, 5Y
Value--4 or 5 moist, 6 or 7 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, silt
Clay content--3 to 10 percent
Reaction--6.0 to 7.3
Electrical conductivity--4 to 8 ds/m
Thickness--2 to 15 cm
Cg1 horizon
Hue--2.5Y, 10B
Value--2.5 or 5 moist, 4 to 7 dry
Clay content--3 to 10 percent
Reaction--6.1 to 6.9
Electrical conductivity--4 to 8 ds/m
Thickness--15 to 75 cm
Cg2 horizon
Hue---2.5Y, 10Y, neutral
Value--3 or 4 moist, 5 or 6 dry
Chroma--1 or 0 moist
Fine-earth texture--silt, silt loam
Clay content--3 to 10 percent
Reaction--6.4 to 6.8
Electrical conductivity--4 to 8 ds/m
Rock fragment content--0 to 3 percent gravel
Thickness--15 to 45 cm
Cg3 horizon
Hue--neutral, 5B
Value--2.5 or 3 moist, 4 or 5 dry
Chroma--1 or 0 moist
Fine-earth texture--silt, silt loam
Clay content--3 to 10 percent
Reaction--6.7 to 7.2
Electrical conductivity--4 to 8 ds/m
Thickness--45 to 148 cm
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--0 to 15 m
Climate--warm, moist summers; cold, moist winters
Mean annual precipitation--520 to 720 mm
Mean annual air temperature--0.3 to 0.9 degree C
Frost-free period--85 to 140 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Sheepisland-organic soil material; similar landscape positions
Flounder--no aquic conditions at surface; 40 to 70 percent slopes; coarse-loamy particle size class; bluffs
Picnicpoint-organic soil material; similar landscape positions
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--very poorly drained
Flooding--very frequent, extremely brief
Saturation in normal years--at the soil surface and throughout the profile during all months
Saturated hydraulic conductivity (Ksat)--Moderately high throughout, except moderately high or high in the Cg2 horizon
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential natural vegetation--bluejoint, Lyngbye's sedge, American dunegrass, purple marshlocks, marsh pea, marsh willowherb
DISTRIBUTION AND EXTENT: Bristol Bay Lowlands, Alaska; MLRA 236; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Togiak National Wildlife Refuge, Ahklun Mountains Area, Dillingham Census Area, Alaska, 2019
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 25 to 100 cm
*Aquic conditions--throughout the profile
*Reduced matrix--all horizons
National Cooperative Soil Survey
U.S.A.