LOCATION AUGUSTA LAKE MNTentative Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Hapludolls
TYPICAL PEDON: Augusta Lake fine sandy loam, on a 2 percent slope in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 25 cm (0 to 10 inches); black (10YR 2/1) fine sandy loam, dark gray (10YR 4/1) dry; weak very fine granular structure; friable; slightly acid; abrupt smooth boundary. [Thickness of the A horizons is 25 to 41 cm (10 to 16 inches)]
AB--25 to 38 cm (10 to 15 inches); very dark brown (10YR 2/2) and dark brown (10YR 3/3) fine sandy loam, grayish brown (10YR 5/2) dry; weak fine subangular blocky structure parting to weak fine granular; friable; moderately acid; gradual smooth boundary.[Thickness of the AB horizons is 0 to 15 cm (0 to 6 inches)]
Bw1--38 to 58 cm (15 to 23 inches); dark brown (10YR 3/3) and dark yellowish brown (10YR 3/4) fine sandy loam, brown (10YR 5/3) dry; weak fine and medium subangular blocky structure; friable; slightly acid; clear wavy boundary.
Bw2--58 to 71 cm (23 to 28 inches); dark yellowish brown (10YR 4/4) fine sandy loam; weak fine and medium subangular blocky structure; friable; slightly acid; gradual wavy boundary.
Bw3--71 to 117 cm (28 to 46 inches); dark yellowish brown (10YR 4/4) loamy fine sand; weak fine and medium subangular blocky structure; very friable; neutral; gradual smooth boundary. [Combined thickness of the Bw horizons is 76 to 127 cm (30 to 50 inches)]
2Bk--117 to 168 cm (46 to 66 inches); olive brown (2.5Y 4/4) loam; weak medium subangular blocky structure; friable; common fine distinct gray (2.5Y 5/1) Fe depletions, common fine prominent yellowish brown (10YR 5/6) and common fine prominent brown (7.5YR 4/4) Fe concentrations; common very pale brown (10YR 8/2) calcium carbonate nodules; about 6 percent gravel; violently effervescent; moderately alkaline. gradual wavy boundary. [Thickness of the Bk horizon is 0 to 64 cm (0 to 25 inches)]
2C--168 to 203 cm (66 to 80 inches); light olive brown (2.5Y 5/4) loam; massive; friable; common fine distinct gray (2.5Y 5/1) Fe depletions, common fine prominent yellowish brown (10YR 5/6) and common fine prominent brown (7.5YR 4/4) Fe concentrations; few very pale brown (10YR 8/2) calcium carbonate nodules; about 7 percent gravel; strongly effervescent; moderately alkaline.
TYPE LOCATION: Cottonwood County, Minnesota (Major Land Resource Area 103); about 8 miles north and 1 mile west of Jeffers, Minnesota; about 213 m (700 feet) north and 152 m (500 feet) west of the southeast corner of section 12, T. 108 N., R. 37 W.; at an elevation of about 421 m (1380 feet) above mean sea level; USGS Sanborn quadrangle; latitude 44 degrees 10 minutes 04 seconds N., longitude 95 degrees 13 minutes 23 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 25 to 61 cm (10 to 24 inches)
Depth to Loamy Sediment or Glacial till: 102 to 152 cm (40 to 60 inches)
Depth to Seasonal High Saturation:1.2 to 1.8 m (4 to 6 feet )
RANGE OF INDIVIDUAL HORIZONS:
Ap and A horizons:
Hue: 10YR
Value: 2 or 3
Chroma: 1 through 3
Texture: loam, fine sandy loam, or sandy loam
Clay: 10 to 25 percent
Sand: 40 to 60 percent
Reaction: moderately acid to neutral
Bw horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 through 6
Texture: fine sandy loam, sandy loam or loamy fine sand
Clay: 8 to 18 percent
Sand: 55 to 80 percent
Reaction: moderately acid to neutral
2Bk horizon:
Hue: 10YR, 2.5Y or 5Y
Value: 4 through 6
Chroma: 3 or 4
Texture: loam
Clay: 18 to 27 percent
Sand: 35 to 50 percent
Reaction: slightly alkaline or moderately alkaline
2C horizon:
Hue: 10YR, 2.5Y or 5Y
Value: 4 through 6
Chroma: 2 through 4
Texture: silt loam or loam
Clay: 10 to 27 percent
Sand: 20 to 40 percent
Reaction: slightly alkaline or moderately alkaline
COMPETING SERIES: These are the
Aureola,
Becker,
Bertram,
Bolan,
Dickinson,
Elrick,
Etter,
Filley,
Flagler,
Gardencity,
Olin,
Ridgeport,
Roine,
Wadenill, and
Zenor series.
Aureola--have carbonates within depths of 50 to of 102 centimeters (20 to 40 inches)
Becker--have a mollic epipedon 60 to 102 centimeters (24 to 40 inches) thick
Bertram--have a lithic contact within depths of 50 to 102 centimeters (20 to 40 inches)
Bolan--have a clay content of 12 to 32 percent in the upper third of the series control section and have a sand content of greater than 50 percent in the lower third of the series control section
Dickinson, Filley, Flagler, Ridgeport and Zenor--do not have glacial till within depths of 60 inches
Elrick--have a sand content of more than 50 percent medium sand and coarser sand in the lower third of series control section
Etter--have a clay content of less than 10 percent in the lower third of the series control section
Gardencity--have a sand content of 15 to 50 percent in the particle-size control section Olin and Roine--have a bulk density more than 1.6 g/cc in the lower third of the series control section.
Wadenill--have carbonates within depths of 46 to 102 centimeters (18 to 40 inches)
GEOGRAPHIC SETTING:
Landscape: Glaciated uplands
Landform: Summits and backslopes
Elevation: 274 to 479 m (900 to 1,500 feet) above sea level
Parent Material: Eolian sediments and loamy sediment over glacial till
Mean Annual Air Temperature: 7 to 10 degrees C (45 to 50 degrees F)
Mean Annual Precipitation: 660 to 762mm (26 to 30 inches)
Frost Free Period: 155 to 200 days
Slopes: 1 to 6 percent
GEOGRAPHICALLY ASSOCIATED SOILS:
The well drained
Amiret and
Clarion and somewhat poorly drained
Nicollet and
Normania soils do not have a lithologic discontinuity in the series control section. The moderately well drained
Ocheyedan soils occupy similar positions on the landscape and contain less sand throughout the profile. The somewhat poorly drained
Fostoria soils occur lower on the landscape and are fine-loamy.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: well drained--seasonally high saturation occurs between depths of 1.2 to 1.8 m (4 and 6 feet) during the wettest portions of normal years.
Saturated hydraulic conductivity:14.11 to 42.34 micrometers per second (2.0 to 6.0 inches) in the loamy sediments and 4.23 to 14.11 micrometers per second (.6 to 2.0 inches) in the glacial till
Surface runoff potential: negligible to low
USE AND VEGETATION: Commonly used for row crops. Native vegetation is tall grass prairie
DISTRIBUTION AND EXTENT: MLRA-103, Southern Minnesota and Northern Iowa. Augusta Lake soils are not extensive
MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota
SERIES PROPOSED: Cottonwood County, Minnesota 2005
REMARKS: Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from 0 to 23 inches (Ap, AB, and Bw1 horizons); cambic horizon - the zone from 23 to 46 inches (Bw2 and Bw3 horizons); calcic horizon-the zone from 46 to 66 inches).
This soil was formerly included with the Dickman and Grogan soils in Cottonwood County.