LOCATION TOYATTE                 AK

Established Series
IRD. JDP/NDP/SCD
02/2022

TOYATTE SERIES

Landscape--mountains
Landform--muskegs of mountain slopes
Slope--25 to 50 percent
Parent material--organic material over till over residuum
Mean annual precipitation--about 2600 mm
Mean annual air temperature--about 6 degrees C
Depth class--shallow
Drainage class--somewhat poorly drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--aquic

TAXONOMIC CLASS: Dysic Lithic Cryofolists

TYPICAL PEDON: Toyatte moderately decomposed plant material in an area of woodland on a muskeg, on a convex mountain slope of 25 percent slope at an elevation of 94 m (When described on June 18, 2014, the soil was moist from the surface to a depth of 32 cm and wet from a depth of 32 to 42 cm.)

Oe--0 to 16 cm; moderately decomposed plant material; very strongly acid (pH 4.5); clear wavy boundary

Oa--16 to 32 cm; highly decomposed plant material; very strongly acid (pH 4.5); abrupt wavy boundary

Bw--32 to 42 cm; silt loam, 80 percent light gray (2.5Y 7/2) and 20 percent brown (7.5YR 4/3) dry, 80 percent grayish brown (2.5Y 5/2) and 20 percent very dark brown (7.5YR 2.5/3) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium roots throughout; common very fine and fine irregular pores; 2 percent medium iron depletions, gray (2.5Y 6/1) moist, and 3 percent fine strong masses of oxidized iron, strong brown (7.5YR 4/6) moist; 4 percent subrounded gravel; noneffervescent (HCL, 1N); very strongly acid (pH 4.6); abrupt irregular boundary

2R--42 cm; bedrock

TYPE LOCATION: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; Hoonah-Angoon Census Area; latitude 58.3579380, longitude -136.3868150, datum WGS84 (coordinates determined by a GPS unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October (udic)
Thickness of folistic epipedon --15 to 30 cm
Depth to redoximorphic features--25 to 50 cm (somewhat poorly drained)
Depth to lithic contact--25 to 50 cm (shallow)

Particle-size control section
*Thickness of organic soil material--two-thirds or more of total thickness
*Clay content--0 to 10 percent
*Total rock fragment content--0 to 10 percent

Oi or Oe horizon
Organic material--slightly decomposed plant material, moderately decomposed plant material
Reaction (pH)--4.3 to 4.6
Thickness--15 to 20 cm

Oa horizon
Organic material--highly decomposed plant material
Reaction (pH)--4.4 to 4.6
Thickness--5 to 20 cm

Bw horizon
Hue--7.5YR to 2.5Y moist or dry
Value--2 to 5 moist, 4 to 7 dry
Chroma--1 to 3 moist or dry
Clay content--5 to 10 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Reaction (pH)--4.6 to 5.3
Thickness--0 to 10 cm

COMPETING SERIES:
Justicecreek--no aquic conditions (well drained); less than 25 cm (very shallow) to a lithic contact
McGilvery--no aquic conditions (well drained)
Ricker--no aquic conditions (well drained); albic material

GEOGRAPHIC SETTING:
Elevation--20 to 200 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--1750 to 3900 mm
Mean annual air temperature--3 to 8 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Bergbay--umbric epipedon; on similar landforms
Boussole--umbric epipedon; folistic epipedon; on similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Depth to saturation in normal years--more than 32 cm from the soil surface
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--very high in Oe and Oa horizons, moderately high or high in Bw horizon

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Alaska Cedar, bunchberry dogwood, Alaska goldthread, roundleaf sundew, black crowberry, splendid feather moss, bog laurel, bog Labrador tea, deercabbage, Aleutian mountainheath, lodgepole pine, feathermoss, goose neck moss, sphagnum moss, mountain hemlock, oval-leaf blueberry, bog blueberry

DISTRIBUTION AND EXTENT: Alexander Archipelago-Gulf of Alaska Coast, Alaska; MLRA 220; moderate extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA

SERIES ESTABLISHED: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; 2020.

REMARKS:
Diagnostic horizons and other features in this pedon
*Folistic epipedon--zone from the surface to a depth of 32 cm
*Hemic soil material--zone from the surface to a depth of 16 cm
*Sapric soil material--zone from 16 to 32 cm
*Aquic conditions--zone from 32 to 42 cm
*Redoximorphic concentrations and depletions that have chroma of 2 or less--zone from 32 to 42 cm
*Depth to lithic contact--42 cm
*Depth to lithologic discontinuity--42 cm
*Particle-size control section (Histosols)--zone from the surface to a depth of 42 cm

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National Cooperative Soil Survey
U.S.A.