LOCATION GUCKEEN MN+IAEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Aquertic Hapludolls
TYPICAL PEDON: Guckeen silty clay loam with a 2 percent slightly convex slope on a clayey mantled ground moraine, cultivated field. (Colors are for moist conditions unless otherwise stated.)
Ap--0 to 8 inches; black (10YR 2/1) silty clay loam; weak very fine subangular blocky structure; friable; slightly acid; abrupt smooth boundary.
A1--8 to 12 inches; black (10YR 2/1) silty clay; moderate fine subangular blocky structure; friable; moderately acid; clear smooth boundary.
A2--12 to 15 inches; very dark gray (10YR 3/1) silty clay; moderate fine subangular blocky structure; friable; moderately acid; clear smooth boundary. (Combined thickness of A horizons is 12 to 24 inches.)
Bw1--15 to 18 inches; dark grayish brown (2.5Y 4/2) silty clay; very dark grayish brown (10YR 3/2) and dark grayish brown (10YR 4/2) coatings on faces of peds; strong fine angular blocky structure; firm; common very dark gray (10YR 3/1) earthworm casts; moderately acid; clear smooth boundary.
Bw2--18 to 24 inches; dark grayish brown (2.5Y 4/2) silty clay; dark grayish brown (10YR 4/2) coatings on faces of peds; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; moderately acid; clear smooth boundary (Combined thickness of B horizon is 6 to 18 inches.)
2Bw3--24 to 30 inches; grayish brown (2.5Y 5/2) clay loam; dark grayish brown (10YR 4/2) coatings on faces of peds; moderate coarse prismatic structure parting to moderate fine and medium subangular blocky; firm; about 5 percent coarse fragments; slightly acid; clear smooth boundary. (0 to 10 inches thick)
2C--30 to 60 inches; grayish brown (2.5Y 5/2) clay loam; massive; friable; about 5 percent coarse fragments;common medium faint olive gray (5Y 5/2), many fine distinct olive (5Y 5/6), and few medium prominent red (2.5YR 4/8) iron concentrations; slightly effervescent; slightly alkaline.
TYPE LOCATION: Waseca County, Minnesota; about 2 miles south and 4 miles west of Waldorf; 100 feet east and 100 feet north of the southwest corner of sec. 7, T. 105 N., R. 24 W., USGS Mapleton NE quadrangle; lat. 43 degrees 54 minutes 22 seconds N., long. 93 degrees 46 minutes 03 seconds W., NAD 27.
RANGE IN CHARACTERISTICS: Depth to free carbonates range from 18 to 44 inches. Thickness of the lacustrine mantle over glacial till ranges from 20 to 40 inches. The upper sediment typically lacks coarse fragments but in some pedons it contains up to 5 percent by volume of coarse fragments. The glacial till contains 2 to 8 percent by volume of coarse fragments. The coarse fragments are mixed in lithology, but shale is a significant component. A thin stone line or loamy or sandy layer is at the base of the upper sediment in some pedons. The mollic epipedon ranges from 12 to 24 inches in thickness. The 10 to 40 inch control section averages between 35 and 48 percent clay and 15 and 35 percent sand. The upper sediment averages between 35 and 60 percent clay and between 10 to 30 percent sand. The sand is mostly fine and very fine. The 2C horizon has moist bulk density of 1.3 to 1.6 g/cc.
The A horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2. Typically it is silty clay or silty clay loam, but clay loam and clay are within the range. It is moderately acid through neutral.
The part of the B horizon in the upper sediment has hue of 10YR or 2.5Y, value of 3 or 4, and chroma of 2 or 3. It is silty clay loam, silty clay, or clay. It is moderately acid through neutral.
The 2B horizon has hue of 2.5Y, value of 4 or 5, and chroma of 2 through 4. It typically is loam or clay but it has a thin sandy subhorizon in the upper part in some pedons. It is slightly acid through neutral.
The 2Bk horizon (when present) has hue of 2.5Y or 5Y, value of 5 or 6, and chroma of 2 through 4. It is loam or clay loam. It has a calcium carbonate equivalent of 15 to 25 percent. It is slightly alkaline or moderately alkaline.
The 2C horizon has hue of 2.5Y or 5Y, value of 5 or 6, and chroma of 2 through 4. It is loam or clay loam. It has a calcium carbonate equivalent of 10 to 18 percent. It is slightly alkaline or moderately alkaline.
COMPETING SERIES: These are the Collinwood, Kandiyohi, Lakeport, Nameoke and Ocheda soils. The Collinwood soils do not have loamy glacial till in the lower part of the series control section. The Kandiyohi soils have a moist bulk density of 1.6 to 1.8 g/cc in the lower part of the series control section. The Lakeport soils do not have rock fragments in the lower third of the series control section. The Nameoke soils do not have loamy glacial till in the lower third of the series control section. The Ocheda soils have loamy glacial till at depths of 40 to 60 inches.
GEOGRAPHIC SETTING: These soils have plane or slightly convex on nearly level to moderately steep till plains or ground moraines. Slope gradients are 1 to 6 percent. These soils formed in a 20 to 40 inch thick mantle of clayey lacustrine sediments and in underlying loamy calcareous glacial till or modified glacial till. These deposits are Late Wisconsinan in age. Mean annual temperature is approximately 45 to 52 degrees F, and mean annual precipitation is approximately 26 to 32 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the moderately well drained Kamrar soils on higher lying, more sloping areas. The poorly drained Marna soils in swales and flats. The very poorly drained Okoboji and Lura soils in depressions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. Seasonal high saturation occurs as high as 1.5 feet during the months of April to June in years of normal percipitation. Surface runoff is low. Saturated hydraulic conductivity is moderately low in the upper part and moderately high in the lower part.
USE AND VEGETATION: Most all of this soil is cultivated with corn and soybeans being the principal crops. Native vegetation is tall grass prairie.
DISTRIBUTION AND EXTENT: MLRA-103. South-central Minnesota and northern Iowa. Moderately extensive.
MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Faribault County, Minnesota, 1949.
REMARKS: The dual drainage of moderately well and somewhat poor was dropped in favor of just somewhat poorly drained. Kamrar was changed to moderately well drained.
Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from the surface to a depth of 15 inches (Ap, A1, A2 horizons); cambic horizon - the zone from 15 to 30 inches (Bw1, Bw2, and 2Bw3 horizons); Aquertic subgroup based on 2 chroma colors below the A and more than 6 inches of cole in the upper 40 inches.
ADDITIONAL DATA: Refer to Minnesota Agricultural Experiment Station Central File Code Numbers 503 and 506 for results of some laboratory analysis of two pedons of this series.