LOCATION ROSIE                   AK

Established Series
Rev. DKM/DLM
02/2022

ROSIE SERIES

Depth class: Moderately deep
Drainage class: somewhat excessively drained
Parent material: loess over residuum weathered from schist
Landform: back slopes and shoulders of hills
Slopes: 45 to 90 percent
Mean annual precipitation: about 11 inches, 280 mm
Mean annual temperature: about 25 degrees F., -4 degrees C.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive Ustic Calcicryolls

TYPICAL PEDON: Rosie silt loam - on a slope of 75 percent under Alaska sage and prickly rose at 600 feet elevation. (All colors are for moist soil unless noted)

A--0 to 12 inches, (0 to 30 cm); dark brown (7.5YR 3/2) and brown(7.5YR 4/3); silt loam; moderate fine subangular blocky structure; very friable, nonsticky, nonplastic; many very fine and fine and few medium roots; 5 percent channers; slightly alkaline (pH 7.4); clear wavy boundary. (7 to 15 inches thick)

Bk1--12 to 20 inches, (30 to 50 cm); brown (10YR 4/3) and yellowish brown (10YR 5/4); channery silt loam; weak medium subangular blocky; very friable, nonsticky, nonplastic; common very fine and fine and few medium roots; finely disseminated calcium carbonate, strongly effervescent (5 percent calcium carbonate); 30 percent channers (20 percent calcium carbonate nodules on the bottom of rock fragments); moderately alkaline (pH 8.0); clear wavy boundary.

Bk2--20 to 28 inches, (50 to 70 cm); brown (10YR 4/3 and 10YR 5/3); very channery fine sandy loam; massive; very friable, nonsticky, nonplastic; few very fine and fine and few medium roots; finely disseminated calcium carbonate, strongly effervescent (7 percent calcium carbonate); 35 percent channers (25 percent calcium carbonate nodules n the bottom of rock fragments); moderately alkaline (pH 8.0); clear wavy boundary. (The combined thickness of the Bk horizons is 10 to 39 inches thick)

Crk--28 to 72 inches, (70 to 183 cm); Fractured schist bedrock; extremely effervescent

TYPE LOCATION: Greater Nenana Area, Alaska; about 18 miles southwest of Fairbanks; in the SE 1/4 of the SW 1/4, section 26, T. 2S., R. 4W; Fairbanks (C-3) 1:63,360 quad; Fairbanks Meridian; UTM north 7176125 and UTM east 437917, zone 6.

RANGE IN CHARACTERISTICS:

Particle-size control (weighted average):
Percent clay in the control section: 3 to 14 percent
Total coarse fragments in the control section: 15 to 75 percent; weighted average is less than 35 percent.

Soil moisture regime: ustic
Mean annual soil temperature: 26 degrees F., 50 cm
Texture of the loess mixed with residuum substratum: channery to extremely channery silt loam or sandy loam
Percent clay in the loess mantle: 3 to 14 percent
Percent clay in the loess mixed with residuum substratum: 3 to 10 percent
Total coarse fragments in the loess mantle: 0 to 7 percent
Total coarse fragments in the loess mixed with residuum substratum: 15 to 75 percent
Thickness of mollic epipedon 7 to 15 inches, 18 to 35 cm
Thickness of calcic horizon 10 to 39 inches, 25 to 100 cm
Depth to paralithic: 20 to 39 inches, 50 to 100 cm

A horizon:
Matrix color: hue of 10YR or 7.5YR; value of 2 to 4; chroma of 2 to 4
Coarse fragments: Total coarse fragments; 0 to 7 percent channers
Effervescence: nonefforvecent or slightly effervescent
Reaction class: neutral to moderately alkaline

Bk horizon:
Matrix color: hue of 10YR or 7.5YR; value of 3 to 5; chroma of 3 or 4
Texture: channery to extremely channery modifiers for silt loam, silt, or very fine sandy loam
Coarse fragments: Total coarse fragments; 15 to 75 percent, 15 to 50 percent channers and 0 to 25 percent flagstones
Effervescences: slightly effervescent or strongly effervescent
Reaction class: slightly alkaline or moderately alkaline

2Crk horizon:
Texture: weathered schist bedrock

COMPETING SERIES: There are no competing soils in the same family.

GEOGRAPHIC SETTING:
Parent material: loess over residuum weathered from schist
Landform: back slopes and shoulders of hills
Slope: 45 to 90 percent
Mean annual temperature: 23 to 28 degrees F., -5 to -2 C.
Mean annual precipitation: 10 to 15 inches, 250 to 380 mm

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Steese and Gilmore series. Steese and Gilmore soils are well drained and occur on similar landforms.

DRAINAGE AND PERMEABILITY: somewhat excessively drained, very high runoff, saturated hydraulic conductivity is moderate in the loamy surface mantle and very high in the loess mixed with residuum and weathered schist bedrock.

USE AND VEGETATION: Used for wild life habitat and recreation. The native vegetation includes grasses, red cedar, roses.

DISTRIBUTION AND EXTENT: MLRA 231, Interior Alaska Highlands, The series is of limited 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:
Thickness of mollic epipedon 0 to 12 inches, 0 to 30cm
Thickness of calcic horizon 12 to 39 inches, 25 to 100 cm
Depth to paralithic: 28 inches, 70cm
Temperature regime: cryic 26 F., -3 C.
Moisture regime: Udic

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.