LOCATION NUNA AK
Established Series
MPS/SAS/TJR
05/2022
NUNA SERIES
Landscape--valleys
Landform--terraces
Slope--0 to 5 percent
Parent material--mossy organic material over grassy organic material over alluvium
Mean annual precipitation--about 480 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy, mixed, dysic Terric Cryosaprists
TYPICAL PEDON: Nuna mucky peat on a linear, linear on a slope of 1 percent at an elevation of 55 m (The soil was moist from 0 to 15 cm, wet, nonsatiated from 15 to 80 cm and wet, satiated throughout the rest of the profile when described on June 24, 2016.)
Oe--0 to 15 cm; mucky peat, 50 percent brown (7.5YR 5/3) and 50 percent brown (7.5YR 5/4) dry, 50 percent dark brown (7.5YR 3/3) and 50 percent dark brown (7.5YR 3/4) moist; many very fine and medium, and common fine roots; extremely acid (pH 3.9); clear wavy boundary
Oa1--15 to 37 cm; stratified muck, 50 percent brown (7.5YR 4/2) and 50 percent brown (7.5YR 4/3) dry, 50 percent very dark brown (7.5YR 2.5/2) and 50 percent very dark brown (7.5YR 2.5/3) moist; common very fine and fine, and many medium roots; extremely acid (pH 3.8); clear smooth boundary
Oa2--37 to 85 cm; muck, brown (7.5YR 5/3) dry, dark brown (7.5YR 3/3) moist; common very fine, fine, and medium roots; extremely acid (pH 3.9); clear smooth boundary
Oa3--85 to 115 cm; muck, brown (7.5YR 4/2) dry, very dark brown (7.5YR 2.5/2) moist; extremely acid (pH 4.1); clear smooth boundary
2A--115 to 122 cm; silt, 50 percent dark gray (10YR 4/1) and 50 percent dark grayish brown (10YR 4/2) dry, 50 percent black (10YR 2/1) and 50 percent very dark brown (10YR 2/2) moist; weak, coarse, granular structure; nonsticky, slightly plastic; very strongly acid (pH 4.7)
2Cg--122 to 180 cm; silt, light greenish gray (10Y 8/1) dry, greenish gray (10Y 6/1) moist; massive; nonsticky, slightly plastic; moderately acid (pH 5.8)
TYPE LOCATION: Yukon-Koyukuk Census Area, Alaska, latitude 62.8965900, longitude -160.7383340 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 at the soil surface for at least two weeks during the growing season (aquic soil moisture regime)
Thickness of organic soil materials--40 to 120 cm
Thickness of sapric soil material layers--25 to 100 cm
Bulk density--greater than 0.1 g/cm3
Particle Size Control Section:
*Clay--5 to 16 percent
Oe horizon
Hue--5YR, 7.5YR or 10YR
Value--2.5 to 5 moist, 4 to 7 dry
Chroma--3 to 6
Reaction--3.3 to 4.2
Organic matter content--35 to 55 percent
Rubbed fiber content--17 to 40 percent
Thickness--10 to 35 cm
Oa1 horizon
Hue--5YR or 7.5YR
Value--2.5 or 3 moist, 4 or 5 dry
Chroma--2 or 3
Reaction--3.6 to 4.3
Organic matter content--35 to 55 percent
Rubbed fiber content--0 to 17 percent
Sodium pyrophosphate color value and chroma at or below--5/1, 6/2, and 7/3
Thickness--15 to 25 cm
Oa2 horizon
Hue--5YR or 7.5YR
Value--2.5 or 3 moist, 4 or 5 dry
Chroma--2 or 3
Reaction--3.6 to 4.3
Organic matter content--35 to 55 percent
Rubbed fiber content--0 to 17 percent
Sodium pyrophosphate color value and chroma at or below--5/1, 6/2, and 7/3
Thickness--40 to 55 cm
Oa3 horizon
Hue--7.5YR or 10YR
Value--2.5 to 5 moist, 4 to 7 dry
Chroma--2 to 6
Reaction--3.7 to 4.4
Organic matter content--35 to 55 percent
Rubbed fiber content--0 to 17 percent
Sodium pyrophosphate color value and chroma at or below--5/1, 6/2, and 7/3
Thickness--20 to 35 cm
2A horizon
Value--2 or 2.5 moist, 4 or 5 dry
Chroma--1 or 2
Fine-earth texture--silt, silt loam
Clay--5 to 16 percent
Sand--5 to 25 percent
Organic carbon--8 to 12 percent
Reaction--4.5 to 5.5
Thickness--5 to 20 cm
2Cg horizon
Hue--10YR, 2.5Y or 10Y
Value--2 to 6 moist, 4 or 8 dry
Chroma--1 or 2
Fine-earth texture--silt, silt loam
Clay--5 to 16 percent
Sand--5 to 25 percent
Organic carbon--1 to 2 percent
Reaction--5.0 to 6.5
COMPETING SERIES:
*
Nikolai--Oi horizon present, total thickness of organic materials is 30 to 90 cm, depressions on till plains and coastal plains, slope range is 0 to 12 percent
GEOGRAPHIC SETTING:
*Elevation--50 to 400 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--455 to 550 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Blackcove--total thickness of organic soil materials is greater than 130 cm, reaction is 4.5 to 6.0 in the organic soil layers; depressions in valleys and hills
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--very poorly drained
*Saturation during normal years--saturated at the soil surface for at least two weeks during the growing season
*Ponding--frequent, long
*Saturated hydraulic conductivity (Ksat)--high in the organic soil horizons, moderately high in the mineral soil horizons
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--bog rosemary, dwarf birch, livid sedge, leatherleaf, roundleaf sundew, black crowberry, white cottongrass, marsh Labrador tea, black spruce, cloudberry, sphagnum, small cranberry, bog blueberry, reindeer lichen, grass graminoid, Moss, greygreen reindeer lichen, star reindeer lichen, Schreber's big red stem moss, oval-leaf blueberry, lingonberry, Bigelow's sedge, bluejoint, polytrichum moss, Northwest Territory sedge, tussock cottongrass, snow lichen, resin birch, water sedge
DISTRIBUTION AND EXTENT: Yukon-Kuskokwim Highlands, Alaska; MLRA 230; 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--115 cm
*Aquic conditions--zone from 0 to 180 cm
*Hemic soil materials--zone from 0 to 15 cm
*Sapric soil materials--zone from 15 to 115 cm
*Lithological discontinuity--zone from 115 to 180 cm
________________________________________
National Cooperative Soil Survey
U.S.A.