LOCATION FAA                     AK

Established Series
Rev. DKM/DLM
05/2022

FAA SERIES

Depth class: very deep
Drainage class: moderately well drained
Parent material: loess over eolian sand
Landform: stabilized dunes on flood plains
Slopes: 0 to 30 percent
Mean annual precipitation: about 11 inches, 280 mm
Mean annual air temperature: about 28 degrees F., -2 degrees C.

TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive Aquic Haplocryepts

TYPICAL PEDON: Faa silt loam - on a slope of 6 percent under an aspen and white spruce forest at 370 feet elevation. (All colors are for moist soil unless noted)

Oi--0 to 3 inches, (0 to 7 cm); black (7.5YR2.5/1); slightly decomposed plant material; many very fine, fine, medium and coarse roots; neutral (pH 6.6); abrupt smooth boundary. (1 to 5 inches thick)

A--3 to 6 inches, (7 to 15 cm); dark brown (10YR3/3); silt loam; weak fine granular structure; very friable, slightly sticky, slightly plastic; common very fine, fine, and medium roots; slightly acid (pH 6.2); clear smooth boundary. (2 to 5 inches thick)

Bw--6 to 12 inches, (15 to 30 cm); dark brown (7.5YR3/4); silt loam; moderate thin platy structure; very friable, slightly sticky, slightly plastic; common very fine, fine, and medium roots; slightly acid (pH 6.3); clear smooth boundary. (5 to 21 inches thick)

C--12 to 39 inches, (30 to 100 cm); brown (10YR5/3); fine sandy loam; massive; very friable, slightly sticky, slightly plastic; few fine roots; common fine faint yellowish brown (10YR 5/6) redoximorphic concentrations and common fine distinct light brownish gray (2.5Y6/2) redoximorphic depletions; neutral (pH 6.8); clear smooth boundary. (14 to 29 inches thick)

2C1--39 to 59 inches, (100 to 150 cm); reddish brown (2.5YR 5/3); loamy sand; massive; very friable, nonsticky, nonplastic; slight effervescence; common fine faint yellowish brown (10YR 5/6) redoximorphic concentrations and common fine distinct light brownish gray (2.5Y6/2) redoximorphic depletions; slightly alkaline (pH 7.6); clear smooth boundary. (0 to 32 inches thick)

2C2--59 to 72inches, (150 to 183 cm); dark gray (10YR4/1); fine sand; single grain; loose, nonsticky, nonplastic; strong effervescence; slightly alkaline (pH 7.6). (80 to 127 inches thick)

TYPE LOCATION: Greater Nenana Area, Alaska; about 2 miles southeast of Nenana; in the NW 1/4 of the NW 1/4, section 31, T. 4 S., R. 8 W.; Fairbanks C5 1:36,360 quad; Fairbanks Meridian; UTM north 7157927 and UTM east 401218, zone 6.

RANGE IN CHARACTERISTICS:

Particle-size control (section weighted average):
Percent clay in the control section: 3 to 10 percent
Soil moisture regime: udic
Mean annual soil temperature: 33 degrees F., 50 cm
Thickness of organic materials: 1 to 5 inches, 2 to 9 cm
Texture of the loamy mantle: silt loam, silt, very fine sandy loam or fine sandy loam
Texture of the eolian sand substratum: loamy sand, , fine sand,
Percent clay in the loamy mantle: 3 to 10 percent
Percent clay in the eolian sand substratum: 0.2 to 0.4 percent
Thickness of ochric epipedon 2 to 5 inches, 5 to 13 cm
Thickness of cambic horizon 5 to 21 inches, 24 to 53 cm
Depth to eolian sand: 26 to 41 inches, 65 to 105 cm

O horizon:
Matrix color: hue of 7.5YR or 10YR; value of 2 or 3; chroma of 1 to 3
Texture: slightly to moderately decomposed plant material
Reaction class: slightly acid to neutral

A horizon:
Matrix color: hue of 7.5YR or 10YR; value of 2 or 3; chroma of 1 to 3
Texture: silt loam or silt
Reaction class: slightly acid to neutral

Bw horizon:
Matrix color: hue of 7.5YR or 10YR; value of 3 or 4; chroma of 3 to 6
Texture: silt loam or silt
Reaction class: slightly acid to neutral

C or BC horizon:
Matrix color: hue of 7.5YR or 10YR; value of 4 or 5; chroma of 3 to 6
Redoximorphic concentrations: hue of 7.5YR to 10YR; value of 3 to 5; chroma of 3 to 8
Redoximorphic depletions: hue of 10YR or 2.5Y; value of 5 or 6; chroma of 2
There are often buried A horizons 1 to 4 inches thick
Texture: silt loam, very fine sandy loam or fine sandy loam

2C horizon:
Matrix color: hue of 10YR or 2.5Y; value of 4 or 5; chroma of 1 to 3
Redoximorphic concentrations: hue of 7.5YR to 10YR; value of 3 to 5; chroma of 3 to 8
Redoximorphic depletions: hue of 10YR or 2.5Y; value of 5 or 6;
Texture: loamy sand or fine sand
Effervescence: slightly to strongly
Reaction class: neutral to moderately alkaline

COMPETING SERIES: This is the Moosehead series. Moosehead series do not have carbonates in the subsoil.

GEOGRAPHIC SETTING:
Parent material: Loess over eolian sand
Landform: stabilized dunes on flood plains
Slope: 0 to 30 percent
Mean annual air temperature: 25 to 30 degrees F., -4 to -1 C.
Mean annual precipitation: 9 to 15 inches, 230 to 380 mm

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Tatlanika(T) and Totatlanika(T). Tatlanika(T) and Totatlanika soils are on floodplains and are poorly drained.

DRAINAGE AND PERMEABILITY: moderately well drained, moderate runoff, saturated hydraulic conductivity moderate in the loamy mantle and rapid in the eolian sand substratum.

USE AND VEGETATION: Used for recreation, home sites and wildlife habitat. The native vegetation includes aspen, white spruce and paper birch.

DISTRIBUTION AND EXTENT: MLRA 229, Interior Alaska Lowlands, The series is of small extent.

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

SERIES ESTABLISHED: Greater Nenana Area, Alaska, 2007

REMARKS: Diagnostic features and horizons recognized in this profile include:
Ochric epipedon: from 3 to 6 inches, 7 to 15 cm.
Cambic horizon: from 6 to 12 inches, 15 to 30 cm.
redoximorphic concentrations: from 12 to 59 inches, 30 to 150 cm.
redoximorphic depletions: from 12 to 59 inches, 30 to 150 cm.
effervescence with dilute hydrochloric acid: from 39 to 72 inches, 100 to 183 cm.
Temperature regime: cryic 33 F., 0.5 C.
Moisture regime: udic

ADDITIONAL DATA:

---

National Cooperative Soil Survey
U.S.A.