LOCATION ANNAHOOTZ               AK

Established Series
Rev. CSC/JMD/JPM
12/2022

ANNAHOOTZ SERIES

The Annahootz series consists of very deep, well drained soils formed from partially decomposed forest litter overlying fragmental stones and boulders. Annahootz soils are on footslopes and benches at the base of backslopes. Slopes range from 5 to 35 percent. The mean annual precipitation is in excess of 60 inches. The mean annual temperature is about 46 degrees F.

TAXONOMIC CLASS: Dysic Typic Cryofolists

TYPICAL PEDON: Annahootz mucky peat - on a southwest facing linear slope of 70 percent at 760 feet elevation. (All colors are for moist soil)

Oe -- 0 to 6 inches; dark brown (10YR 3/3) mucky peat consisting of moderately decomposed forest litter; 40 percent unrubbed fiber content, 70 percent rubbed; extremely acid (pH 4.0; 1:1,H2O); clear wavy boundary. (1 to 13 inches thick)

Oa1 -- 6 to 15 inches; very dark gray (10YR 3/1) muck consisting of well decomposed forest litter; 20 percent unrubbed fiber content, 15 percent rubbed; very strongly acid (pH 4.5; 1:1,H2O); clear irregular boundary. (2 to 6 inches thick)

Oa2 -- 15 to 60 inches; very dark gray (10YR 3/1) extremely stony muck consisting of well decomposed forest litter; 20 percent unrubbed fiber content, 15 percent rubbed; 85 percent colluvial stones and boulders; very strongly acid (pH 4.5; 1:1,H2O). (41 to 57 inches thick)

TYPE LOCATION: Finger Creek, Chatham Area, Southeast, Alaska. SW1/4, SW1/4, Sec. 22, T.48S., R.61E., Copper River Meridian.

RANGE IN CHARACTERISTICS: Depth to fragmental material ranges from 8 to 16 inches. The organic materials consist of moderately to well decomposed leaves, twigs, and needles. Coarse fragment content in the lower layers ranges from 85 to 95 percent and is dominantly stones and boulders. The interstices of the fragmental material are partly filled with well decomposed forest litter. The soil is not frozen in most years due to maritime influence. pH is less than 5.0 (1:1,H2O) in the organic layers.

COMPETING SERIES: These are the Reggad (WA), Sokolof (AK) and Tebenkof (AK) series. Reggad soils have volcanic ash and pumice in the organic layers. Sokolof soils have only gravel and cobble size coarse fragments. Tebenkof soils have mineral horizons above the fragmental material.

GEOGRAPHIC SETTING: The Annahootz soils are on footslopes and benches at the base of very steep backslopes and snow avalanche slopes. These soils formed from forest litter overlying and mixed with colluvial stones and boulders. The climate is humid maritime with a mean annual precipitation range of 60 to 220 inches. The mean annual temperature is about 46 degrees F. and the mean summer temperature is about 57 degrees F. Elevation ranges from 0 to 1500 feet.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Passage, Kupreanof, Sitka, Tolstoi, Traitors, and Verstovia soils. Passage, Kupreanof, and Sitka soils are on similar topographic positions but are mineral soils and lack boulders throughout the profile. Tolstoi, Traitors, and Verstovia soils are shallow to bedrock, mineral soils on steep backslopes.

DRAINAGE AND PERMEABILITY: Well drained. Rapid permeability. Very slow runoff.

USE AND VEGETATION: The Annahootz soils are used for timber production, watershed protection, wildlife habitat and recreation. The overstory is dominantly western hemlock. The understory is dominantly blueberry.

DISTRIBUTION AND EXTENT: Southeast Alaska. The series is of moderate extent.

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

SERIES ESTABLISHED: Chatham Area, Tongass National Forest, Alaska, 1992.

REMARKS: Diagnostic horizons and features recognized in this soil include: well drained organic material from 0 to 16 inches; fragmental material with interstices filled with organic material from 16 to 60 inches; cryic temperature regime; pH of less than 5.0 (1:1,H2O) throughout the organic layers.

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National Cooperative Soil Survey
U.S.A.