LOCATION TALKEETNA AK
Established Series
Rev. MHC/JPM/DM
02/2022
TALKEETNA SERIES
Depth class: deep to very deep
Drainage class: well drained
Parent material: ash-influenced loess overlying friable to firm glacial till
Landform: mountain slopes, hills, ridges, and structural benches
Slopes: 0 to 85 percent
Mean annual precipitation: 35 to 50 inches
Mean annual temperature: 33 to 36 degrees F.
TAXONOMIC CLASS: Medial over loamy-skeletal, amorphic over mixed, superactive Andic Humicryods
TYPICAL PEDON: Talkeetna silt loam - on a southwest facing slope of 25 percent at 2000 feet elevation under tall grass and shrubs. (All colors are for moist soil)
Oi--0 to 3 inches; dark brown (7.5YR 3/2) slightly decomposing plant material and mat of roots; extremely acid (pH 4.3); clear smooth boundary. (0 to 4 inches thick)
A--3 to 6 inches; dark reddish brown (5YR 2/2) silt loam; strong fine granular structure; very friable, sticky and slightly plastic; many roots; mineral grains are coated and have a waxy appearance; extremely acid (pH 4.3); clear wavy boundary. (0 to 3 inches thick)
E--6 to 7 inches; dark gray (10YR 4/1) silt loam; weak very thin platy structure; very friable, slightly sticky and slightly plastic; many roots; many uncoated mineral grains; extremely acid (4.3); clear wavy boundary. (1 to 3 inches thick)
Bhs--7 to 11 inches; very dusky red (2.5YR 2/2) mucky silt loam; moderate thin platy structure parting to moderate fine granular; very friable, nonsticky and nonplastic; many roots; smeary; extremely acid (pH 4.3); clear wavy boundary. (4 to 6 inches thick)
Bs1--11 to 14 inches; dark reddish brown (2.5YR 3/4) silt loam; weak thin platy structure parting to moderate fine granular; very friable nonsticky and slightly plastic; many roots; many mica flakes; smeary; extremely acid; clear wavy boundary. (3 to 8 inches thick)
Bs2--14 to 18 inches; dark reddish brown (5YR 3/4) silt loam; moderate thin platy structure parting to moderate fine granular; nonsticky and lightly plastic; smeary; very strongly acid (pH 4.6); clear wavy boundary. (3 to 8 inches thick)
2C1--18 to 28 inches; olive gray (5Y 5/2) very gravelly sandy loam; strong medium platy structure; very firm, nonsticky and nonplastic; patches and seams of red (2.5YR 4/6) along plates; strongly acid (pH 5.1); gradual wavy boundary. (5 to 20 inches thick)
2C2--28 to 60 inches; olive gray (5Y 4/2) very gravelly sandy loam; strong medium platy structure; firm, nonsticky and nonplastic; few red (2.5YR 4/6) mottles; strongly acid (pH 5.1).
TYPE LOCATION: Matanuska-Susitna Valley Area, Alaska; about 12 miles north of Palmer; in the NW 1/4 of the SW 1/4 of section 36, T. 20 N., R. 1 E., Seward Meridian.
RANGE IN CHARACTERISTICS:
Depth to the glacial till: is 15 to 24 inches
Silty solum thickness: 15 to 25 inches and may be bisequal
Spodic horizons: 6 to 10 percent total organic carbon 4 to 6 inches thick
Upper part of the control section: formed in loess dominated by amorphous material
Depth to bedrock: 40 to greater than 60 inches. Reaction ranges from extremely acid to strongly acid in the solum and very strongly acid to moderately acid in the substratum.
O horizon:
Matrix color: hue of 7.5YR or 10YR; value of 2 to 4; chroma of 2 or 3
Reaction class: extremely acid or very strongly acid
A horizon: (where present)
Matrix color: hue of 5YR to 10YR; value of 2 to 4; chroma of 1 or 2
Texture: silt, silt loam, very fine sandy loam
Reaction class: extremely acid or very strongly acid
Bhs horizon:
Matrix color: hue of 2.5YR to 10YR; value of 2 or 3; and chroma of 1 or 2
Texture: mucky silt, mucky silt loam, mucky very fine sandy loam
Total organic carbon: 6 to 12 percent
Reaction class: extremely acid or very strongly acid
Bs horizons
Matrix color: hue of 2.5YR to 7.5YR; value of 3 or 4; chroma of 3 or 4
Texture: silt, silt loam, very fine sandy loam
Reaction class: extremely acid or very strongly acid
2C horizon:
Matrix color: hue of 2.5Y or 5Y; value of 4 or 5; chroma of 2 or 3
Texture: sandy loam, loam modified by 40 to 60 percent coarse fragments; 30 to 55 percent gravel and 10 to 45 percent cobbles
Consistence: friable to firm
Reaction class: very strongly acid to moderately acid
COMPETING SERIES: This is the
Hurdygurdy soil. Hurdygurdy soils are presumed to have a colder soil temperature.
GEOGRAPHIC SETTING:
Drainage class: well drained
Parent material: ash-influenced loess overlying friable to firm glacial till
Landform: mountain slopes, hills, ridges, and structural benches
Slopes: 0 to 85 percent
Mean annual temperature: 33 to 36 degrees F.
Mean annual precipitation: 35 to 50 inches
GEOGRAPHICALLY ASSOCIATED SOILS: These are
Chunilna,
Deneka, and
Tsadaka soils. Chunilna soils are very poorly drained and occur on depressions. Deneka soils are well drained and are less than 20 inches to hard bedrock. Are well drained soils and have ortstein.
DRAINAGE AND PERMEABILITY: Well drained, very low to high runoff. Saturated hydraulic conductivity is moderately high to high in the solum and moderately high in the substratum.
USE AND VEGETATION: Wildlife habitat and recreation. Native vegetation is alder, willow, tall grass, and other shrubs and forbs. A few areas are use for summer grazing.
DISTRIBUTION AND EXTENT: MLRA 224 Cook Inlet Lowland, South-central, Alaska The series is of moderate extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Soil Reconnaissance in Alaska, 1914.
REMARKS: Diagnostic features and horizons recognized in this profile include:
Albic horizon: from 3 to 4 inches
Spodic horizons: from 7 to 15 inches; 6 percent organic carbon in the upper 4 inches of the spodic
Amorphous material dominant: 3 to 18 inches
Loamy-skeletal material: from 18 to 60 inches
Temperature regime: cryic
ADDITIONAL DATA: The Talkeetna series formerly classified as thixotropic over loamy-skeletal. Type location was relocated to the Matanuska-Susitna Valley Area, Alaska survey area.
Soil characterization study 89AK170009, Matanuska-Susitna Borough, Alaska, samples by SSL, Lincoln NE, 06/89
National Cooperative Soil Survey
U.S.A.