LOCATION ALENEVA AK
Tentative Series
Rev. CAP
05/2024
ALENEVA SERIES
Depth class: very deep
Drainage class: somewhat poorly and moderately well drained
Parent material: herbaceous organic material over medial silty volcanic ash over sandy and gravelly till
Landscape: Islands
Landform: hills and plains in drainageways, swales, and on flood plains
Slopes: 0 to 15 percent
Mean annual precipitation: about 1000 mm (40 in)
Mean annual temperature: about 2 degrees C. (34 degrees F.)
Frost-free season: 20 to 50 days
TAXONOMIC CLASS: Medial over sandy or sandy-skeletal, amorphic over mixed, superactive Oxyaquic Haplocryands
TYPICAL PEDON: Narrow Cape silt loam - on a slope of ? percent at ? feet, ? m elevation under ? vegetation. (All colors are for moist soil)
Oe--0 to 11 centimeters (0 to 4 inches); very dark brown (7.5YR 2.5/2), dark brown (7.5YR 3/2), dry; moderately decomposed plant material; soft, very friable, nonsticky, nonplastic; many very fine, fine, common medium and coarse roots throughout; very strongly acid (pH 4.7); clear wavy boundary. (5 to 19 cm, 2 to 7 in thick)
A--11 to 25 centimeters (4 to 10 inches); very dark gray (10YR 3/1), dark gray (10YR 4/1), dry; medial silt loam; weak medium granular structure; soft, very friable, nonsticky, nonplastic; many very fine, fine, and common medium, coarse roots throughout; strongly acid (pH 5.5); clear wavy boundary. (5 to 25 cm, 2 to 10 in thick)
Bw1--25 to 56 centimeters (10 to 22 inches); dark yellowish brown (10YR 4/4) medial silt loam; weak medium subangular blocky structure; slightly hard, friable, nonsticky, nonplastic; common very fine, fine, and medium roots throughout; 5 percent gravel; moderately acid (pH 5.6); abrupt smooth boundary.
Bw2--56 to 105 centimeters (22 to 41 inches); dark yellowish brown (10YR 4/4) medial silt loam; weak medium subangular blocky structure; slightly hard, friable, nonsticky, nonplastic; common very fine, fine, and medium roots throughout; 5 percent medium distinct spherical strong brown (7.5YR 5/6) masses of oxidized iron throughout and 8 percent fine prominent spherical gray (10YR 6/1) masses of reduced iron throughout; 5 percent gravel; moderately acid (pH 5.6); abrupt smooth boundary. (Combined thickness is 43 to 91 cm, 17 to 36 in thick)
2C1--105 to 140 centimeters (41 to 55 inches); olive (5Y 5/3) very gravelly loamy sand; single grain; loose, nonsticky, nonplastic; common very fine and fine roots throughout; 50 percent gravel and 5 percent cobble; strongly acid (pH 5.4); abrupt smooth boundary. (5 to 40 cm, 2 to 16 in thick)
2C2--140 to 200 centimeters (55 to 79 inches); very dark gray (5Y 3/1) very gravelly coarse sand; single grain; loose, nonsticky, nonplastic; 60 percent gravel and 5 percent cobble; strongly acid (pH 5.5).
TYPE LOCATION: Kodiak Archipelago Soil Survey Area, Alaska; Latitude 57 degrees 32 minutes 2.00 seconds and Longitude 154 degrees 9 minutes 29.00 seconds west, UTM north 6377409.78 and UTM east 430663.06, zone 5, Datum WGS84.
RANGE IN CHARACTERISTICS:
Soil moisture regime: udic
Mean annual soil temperature: 1.6 to 3.3 degrees C. (34.8 to 37.9 degrees F.)
Thickness of organic material: 5 to 19 cm (2 to 7 in)
Depth to andic properties: 5 to 19 cm (2 to 7 in)
Depth to cambic horizon: 10 to 91 cm (4 to 36 in)
Depth to gravelly till: 53 to 135 cm (21 to 53 in)
Depth to aquic conditions: 41 to 100 cm (16 to 40 in)
Oa, Oe, Oi horizon:
Hue: 7.5YR to 10 YR
Value: 2 to 5
Chroma: 1 to 4
Texture: slightly, moderately, or highly decomposed plant material
Organic matter: 60 to 90 percent
Reaction class: extremely acid to moderately acid (pH 3.5 to 6.0)
A horizon:
Hue: 7.5YR to 10 YR
Value: 2 to 5
Chroma: 1 to 3
Texture: medial silt loam, silt, loam, and very fine sandy loam or their gravelly analogues
Rock fragments: 0 to 30 percent
Silt: 40 to 90 percent
Clay: 2 to 10 percent
Reaction class: extremely acid to moderately acid (pH 3.5 to 6.0)
Bw horizon:
Hue: 7.5YR to 10YR
Value: 2 to 5
Chroma: 3 to 6
Texture: (medial) silt loam, silt, loam, or very fine sandy loam, or their gravelly analogues
Silt: 40 to 90 percent
Clay: 2 to 12 percent
Rock fragments: 0 to 30 percent
Reaction class: extremely acid to moderately acid (pH 3.5 to 6.0)
2C horizon:
Hue: 7.5YR, 10YR, or 2.5Y
Value: 3 to 6
Chroma: 1 to 4
Texture: loamy sand, loamy coarse sand, sand, or coarse sand and their very or extremely gravelly analogues
Sand: 50 to 85 percent
Clay: 2 to 10 percent
Rock fragments: 35 to 80 percent
Reaction Class: extremely acid to slightly acid (pH 3.5 to 6.5)
Some pedons have a thin 2C horizon with loamy-skeletal texture.
COMPETING SERIES: This is the
Terlak (AK) series.
Terlak soils have spodic properties, have mean annual precipitation less than 775 mm (30 in), and occur on plains with parent material derived from slope alluvium.
GEOGRAPHIC SETTING:
Elevation: 5 to 400 meters (15 to 1325 feet)
Parent material: moderately decomposed herbaceous organic material over medial silty volcanic ash over sandy and gravelly till
Landform: hills, plains, in drainageways and swales and on flood plains Slope: 0 to 15 percent
Mean annual temperature: 0 to 6 degrees C. (32 to 43 degrees F.)
Mean annual precipitation: 600 to 2000 mm (24 to 79 in)
Frost free period: 20 to 50 days
GEOGRAPHIC SETTING:
Depth class: very deep
Drainage class: well drained
Parent material: volcanic ash over coarse-loamy eolian deposits
Landform: hills and plains
Slopes: 3 to 15 percent
Mean annual precipitation: 700 to 1500 mm (28 to 59 in)
Mean annual temperature: 0 to 6 degrees C. (32 to 43 degrees F.)
Frost-free season: 20 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS: These include
Akalura, Alitak,
Koniag, Luchek,
Rezanof, Sulua,
Terror
Lake, Tungalara,
Wineskey, and Yukuk.
Akalura soils lack aquic conditions within 100cm (40 in), have loamy-skeletal glacial till substratum, and occur on mountains, hills, or ridges on flanks, backslopes, footslopes, and toeslopes.
Alitak soils have thick organic horizons, have aquic conditions within 25 cmn (10 in), lack till substratum, and occur in depressions.
Koniag soils lack aquic conditions within 100cm (40 in), have loamy-skeletal glacial till substratum, and occur on plains and hills on higher landform positions.
Luchek soils have thick organic material over loamy-skeletal glacial till and occur on drainageways and depressions.
Rezanof soils have mollic epipedons, lack aquic conditions within 100cm (40 in), and occur on higher landform positions.
Sulua soils have thick organic material over loamy-skeletal glacial till and occur on drainageways and depressions.
Terror
Lake soils have loamy-skeletal glacial till and occur on similar landform positions.
Tungalara soils lack aquic conditions within 100cm (40 in) and occur on plains and hills on higher landform positions.
Wineskey soils have loamy glaciofluvial and/or lacustrine substratum and occur in similar landform positions.
Yukuk soils have aquic features within 0 to 25 cm (0 to 10 in) and occur on drainageways and depressions.
DRAINAGE AND PERMEABILITY:
Drainage class: somewhat poorly and moderately well drained
Saturated Hydraulic Conductivity: very high in the Oe, high to high in the A and Bw horizons, and very high in the 2C.
Permeability: rapid to very rapid in the Oe horizon and moderate to rapid in the A snd Bw, and moderate to very rapid in the 2C horizons.
Runoff: low to high.
USE AND VEGETATION:
Used for water shed. Native vegetation is Sitka Spruce, Forb meadow and Grass.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Wasilla, Alaska
DISTRIBUTION AND EXTENT: MLRA 220 Alexander Archipelago-
Gulf of Alaska Coast.
Extent: moderate.
SERIES ESTABLISHED: Kodiak Archipelago Soil Survey, Alaska, 2024.
REMARKS: Diagnostic features and horizons recognized in this profile include:
Organic material: 0 to 11 cm (0 to 4 in) (moderately decomposed hemic plant material) (Oe horizon)
Andic soil properties: 11 to 105 cm (4 to 41 in) (A, Bw1, Bw2 horizons)
Cambic horizon: 25 to 105 cm (10 to 41 in) (Bw1, Bw2 horizons)
Lithological discontinuity: 105 to 200 cm (41 to 79 in)
Aquic conditions: 41 to 100 cm (16 to 40 in) (Bw1, Bw2, 2C1, 2C2 horizons)
ADDITIONAL DATA:
User pedon Id: 08AO 12102
National Cooperative Soil Survey
U.S.A.