LOCATION RABBIT AK
Established Series
MPS/SAS
02/2022
RABBIT SERIES
Landscape--valleys
Landform--floodplain
Slope--0 to 8 percent
Parent material--coarse-loamy alluvium over gravelly alluvium
Mean annual precipitation--about 500 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid Fluvaquentic Cryaquepts
TYPICAL PEDON: Rabbit silt on a southwest facing concave, linear toeslope on a slope of 2 percent at an elevation of 316 m (The soil was wet, satiated throughout the soil profile when described on June 26, 2018.)
Oe--0 to 6 cm; gravelly mucky peat, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; many very fine and common fine roots; moderately acid (pH 5.9); clear smooth boundary.
Ag--6 to 33 cm; mucky silt, light olive brown (2.5Y 5/3) dry, dark olive brown (2.5Y 3/3) moist; weak fine granular structure; very friable, nonsticky, nonplastic; many very fine and common fine, medium, and coarse roots; 1 percent dark reddish brown (5YR 2.5/2) masses of oxidized iron in matrix and 4 percent dark reddish brown (5YR 3/4) masses of oxidized iron on surfaces along pores; 6 percent gravel; moderately acid (pH 5.7); gradual wavy boundary
Bg--33 to 61 cm; silt loam, light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; 7 percent brown (7.5YR 4/4) mottles; weak very fine subangular blocky structure; friable, nonsticky, nonplastic; common very fine and medium, and many fine roots; 2 percent strong brown (7.5YR 4/6) masses of oxidized iron on surfaces along pores; 1 percent gravel; moderately acid (pH 6.0); abrupt smooth boundary
Cg1--61 to 67 cm; very gravelly loam, gray (5Y 6/1) dry, dark gray (5Y 4/1) moist; massive; very friable, nonsticky, nonplastic; common very fine and fine roots; 40 percent gravel; slightly acid (pH 6.2); abrupt smooth boundary
Cg2--67 to 86 cm; silt loam, gray (N 5/), dry, very dark gray (N 3/), moist; massive; friable, nonsticky, nonplastic; moderately acid (pH 6.0); abrupt smooth boundary
Cg3--86 to 150 cm; very gravelly loam, gray (5Y 6/1) dry, dark gray (5Y 4/1) moist; massive; very friable, nonsticky, nonplastic; 45 percent gravel; moderately acid (pH 6.0)
TYPE LOCATION: Nome Census Area, Alaska, latitude 63.2943700 longitude -160.9499800 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 between a depth of 0 and 25 cm during much of the growing season (aquic moisture regime)
Thickness umbric epipedon--20 to 35 cm
Depth to redoximorphic iron concentrations--17 to 45 cm
Depth to reduced matrix--17 to 45 cm
Depth to aquic conditions--0 cm
Particle Size Control Section:
*Clay--10 to 18 percent
*Total rock fragments--15 to 35 percent gravel
Oe horizon
Thickness--2 to 18 cm
Ag horizon
Hue--10YR or 2.5Y
Value--2 to 3 moist, 4 or 5 dry
Chroma--2 or 3 moist
Fine-earth texture--silt, silt loam
Clay--2 to 10 percent
Sand--5 to 30 percent
Organic carbon--5 to 8 percent
Total rock fragment content--0 to 10 percent gravel
Reaction--5.5 to 6.1
Thickness--15 to 35 cm
Bg horizon
Hue--10YR or 2.5Y
Value--4 or 5 moist, 6 or 7 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, loam, sandy loam
Clay--8 to 18 percent
Sand--18 to 70 percent
Organic carbon--3 to 5 percent
Total rock fragment content--0 to 25 percent gravel
Reaction--5.0 to 6.1
Thickness--15 to 40 cm
Cg1 horizon
Hue--2.5Y or 5Y
Chroma--1 or 2 moist
Fine-earth texture--silt, silt loam, loam
Clay--5 to 18 percent
Sand--5 to 45 percent
Organic carbon--1 to 2 percent
Total rock fragment content--0 to 45 percent gravel
Reaction--5.6 to 6.2
Thickness--5 to 15 cm
Cg2 horizon
Hue--10Y, 5Y, or N
Value--3 to 5 moist, 5 to 7 dry
Chroma--0 or 1 moist
Fine-earth texture--silt loam, loam
Clay--10 to 18 percent
Sand--35 to 50 percent
Organic carbon--1 to 3 percent
Total rock fragment content--0 to 15 percent gravel
Reaction--5.5 to 6.5
Thickness--10 to 50 cm
Cg3 horizon
Hue--2.5Y or 5Y
Value--4 or 5 moist, 6 or 7 dry
Chroma--1 or 2 moist
Fine-earth texture--loam, sandy loam
Clay--5 to 18 percent
Sand--40 to 75 percent
Organic carbon--0.5 to 2.5 percent
Total rock fragment content--25 to 50 percent gravel
Reaction--5.6 to 6.4
COMPETING SERIES:
*
Kawuneeche--texture ranges to clay loam in the upper part of the profile and to coarse sand in the lower part of the profile, mica content ranges to 30 percent, alluvium over glaciofluvial deposits
*
Willowcreek--coarse fragments range from 0 to 15 percent in the lower part of the profile, textures range to silt loam and very fine sandy loam in the lower part of the profile; drainageways
GEOGRAPHIC SETTING:
*Elevation--50 to 650 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--450 to 575 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Quekilok--histic epipedon, no A horizon present, no Bg horizon present, texture ranges to coarse sand in the lower part of the profile; depressions on floodplains
*
Cuyaqsak--aquic conditions between 50 to 80cm, colluvium, swales on mountains and hills
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--poorly drained
*Flooding--frequent, brief
*Saturation during normal years--saturated between a depth of 0 and 25 cm during much of the growing season
*Saturated hydraulic conductivity (Ksat)--very high in the surface organic layer, high to moderately high throughout the rest of the profile
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--tealeaf willow, bluejoint, field horsetail, moss, dwarf marsh violet
DISTRIBUTION AND EXTENT: Yukon-Kuskokwim Highlands, Alaska; MLRA 230; moderate 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
*Particle-size control section--zone from 31 to 106 cm
*Umbric epipedon--zone from 6 to 33 cm
*Cambic horizon--zone from 6 to 61 cm
*Redoximorphic concentrations--zone from 6 to 61 cm
*Aquic conditions--zone from 0 to 150 cm
*Reduced matrix--zone from 33 to 150 cm
National Cooperative Soil Survey
U.S.A.