LOCATION ALANGO MN+WI

Established Series
MAR-CWT-AGG
01/2011

ALANGO SERIES

The Alango series consists of very deep, somewhat poorly drained soils that formed in calcareous lacustrine sediments on glacial lake plains. Slopes range from 1 to 4 percent. Mean annual air temperature is about 3 degrees C. Mean annual precipitation is about 660 mm.

TAXONOMIC CLASS: Very-fine, smectitic, frigid Chromic Vertic Epiaqualfs

TYPICAL PEDON: Alango silty clay loam, on a convex backslope of 3 percent, under mixed deciduous forest. (Colors are for moist soil unless otherwise stated).

A--0 to 5 cm; very dark gray (10YR 3/1) silty clay loam, dark gray (10YR 4/1) dry; moderate fine granular structure; friable; many fine roots; slightly acid; clear wavy boundary. (2 to 10 cm thick)

Eg--5 to 25 cm; light brownish gray (10YR 6/2) silty clay loam, light gray (10YR 7/2) dry; weak thick platy structure parting to moderate fine subangular blocky; friable; common medium distinct brownish yellow (10YR 6/6) Fe concentrations; common medium roots; moderately acid; clear wavy boundary. (0 to 20 cm thick)

Btg1--25 to 46 cm; dark grayish brown (2.5Y 4/2) clay; moderate medium subangular blocky structure; firm; common dark gray (N 4/0) and dark grayish brown (2.5Y 4/2) clay films on faces of peds and in root channels; few grayish brown (10YR 5/2) silt coats on faces of peds; common medium distinct olive brown (2.5Y 4/4) Fe concentrations; common medium roots; moderately acid; gradual wavy boundary

Btg2--46 to 71 cm; grayish brown (2.5Y 5/2) clay; moderate medium subangular blocky structure; firm; common grayish brown (2.5Y 5/2) and few very dark grayish brown (2.5Y 3/2) clay films of faces of peds; common medium distinct light olive brown (2.5Y 5/4) Fe concentrations; few medium roots; neutral; clear wavy boundary. (Combined thickness of the Btg horizon is 30 to 76 cm)

Bkg--71 to 152 cm; olive gray (5Y 5/2) clay; weak medium subangular blocky structure; firm; common light gray (5Y 7/2) medium carbonate threads; common medium prominent light olive brown (2.5Y 5/6) and few fine prominent yellowish brown (10YR 5/8) Fe concentrations; strongly effervescent; moderately alkaline; gradual wavy boundary. (0 to 91 cm thick)

Cg--152 to 203 cm; dark gray (5Y 4/1) clay; massive; firm; few light gray (5Y 7/2) medium carbonate threads; few medium prominent light yellowish brown (2.5Y 6/4) Fe concentrations; strongly effervescent; moderately alkaline.

TYPE LOCATION: St. Louis County, Minnesota; about 2.5 miles north and 2 miles west of Cook; about 2,100 feet east and 100 feet north of the southwest corner of section 28, T. 63 N., R. 19 W.; USGS Haley topographic quadrangle; lat. 47 degrees 54 minutes 26 seconds N. and long. 92 degrees 46 minutes 32 seconds W., NAD 83.

RANGE IN CHARACTERISTICS: Depth to carbonates ranges from 51 to 127 cm. Rock fragment content ranges from 0 to 2 percent, by volume, throughout the profile, mostly fine gravel in size.

The A horizon has hue of 10YR or 2.5Y, value of 2 or 3, and chroma of 1 or 2. It is silty clay loam, silty clay, clay loam, or clay. Reaction is strongly acid to slightly acid.

The E horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 1 or 2. It is silty clay loam, or silty clay. Reaction is strongly acid to neutral.

The Btg horizon has hue of 10YR, 2.5Y or 5Y, value of 4 to 6 and chroma of 1 or 2. Texture is clay, with thin subhorizons of silty clay or silty clay loam. Clay content averages 60 to 85 percent. Reaction is strongly acid to neutral.

The Bkg horizon has hue of 10YR, 2.5Y, or 5Y, value of 4 or 5, and chroma of 1 or 2. It is clay, or silty clay with thin subhorizons of silty clay loam, and averages 50 to 85 percent clay. Reaction is slightly alkaline or moderately alkaline. It has soft accumulations of calcium carbonate.

Some pedons have a BCg horizon. Properties are similar to the Cg horizon.

The Cg horizon has hue of 10YR, 2.5Y, or 5Y, value of 4 to 6 and chroma of 1 to 3. Texture is clay or silty clay with thin subhorizons of silty clay loam or silt loam. Clay content averages 50 to 85 percent. Reaction is slightly alkaline or moderately alkaline.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Alango soils are on slightly convex to plane surfaces of glacial lake plains. Slopes range from 1 to 4 percent. They formed in calcareous lacustrine sediments. Mean annual air temperature ranges from 2 to 4 degrees C. and mean annual precipitation ranges from 635 to 686 mm. The frost-free period ranges from 90 to 120 days. Elevation ranges from 305 to 490 meters above seal level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Daisybay, Dora, Indus, Taylor, and Woodslake soils. The very poorly drained Dora and Daisybay soils formed in organic material over clayey sediments and are in lower lying concave positions. The poorly drained Indus soils are closely associated and are on plane to slightly concave slopes. The moderately well drained Taylor soils are on more convex slopes and higher lying positions. The very poorly drained Woodslake soils are in lower lying concave positions.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. Runoff is low to medium. Saturated hydraulic conductivity is .01 to 1.41 micrometers per second (.0015 to .20 inches per hour). Perched seasonal high saturation is as high as 15 cm below the surface sometime during spring and fall in normal years.

USE AND VEGETATION: Alango soils are used for mainly for pastureland, hayland and woodland. Aspen, pine, and white spruce are the principal tree species. Native vegetation is mixed coniferous and deciduous forest.

DISTRIBUTION AND EXTENT: MLRA-88 and 91B. Northern Minnesota and northwestern Wisconsin, Moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota

SERIES ESTABLISHED: Burnett County, Wisconsin, 2004

REMARKS: Diagnostic horizons and features recognized in this pedon include: Ochric epipedon - the zone from the surface to a depth of 5 cm (A horizon); Albic horizon - the zone from 5 to 25 cm (Eg horizon); Argillic horizon - the zone from 25 to 71 cm (Btg horizons). 1/28/2011-TYPE LOCATION error was corrected.

The Alango series was formerly recognized as the somewhat poorly drained phase of the Indus series.

ADDITIONAL DATA: For results of some laboratory analysis refer to MAES Central File Code #2567, #2565, #3192. Soil Interpretation Record number MN0824.

National Cooperative Soil Survey
U.S.A.