LOCATION GLENDORADO MNEstablished Series
TAXONOMIC CLASS: Sandy, mixed, frigid Aquic Hapludolls
TYPICAL PEDON: Glendorado loamy sand with a plane slope of 1 percent on an outwash plain in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 25 cm; black (10YR 2/1) loamy sand, dark grayish brown (10YR 4/2) dry; weak fine and medium subangular blocky structure; very friable; few fine roots; about 1 percent gravel; moderately acid; abrupt smooth boundary.
A--25 to 38 cm; very dark grayish brown (10YR 3/2) loamy sand, grayish brown (10YR 5/2) dry; common fine distinct brown (7.5YR 4/4) Fe concentrations; weak fine subangular blocky structure; very friable; few fine roots; about 1 percent gravel; moderately acid; gradual wavy boundary. (Combined thickness of the A horizon is 25 to 61 cm)
Bw1--38 to 56 cm; brown (10YR 4/3) loamy sand; weak medium subangular blocky structure; very friable; few fine roots; about 2 percent gravel; common medium distinct brown (7.5YR 4/4) and common fine prominent dark reddish brown (5YR 3/4) Fe concentrations; strongly acid; clear wavy boundary.
Bw2--56 to 122 cm; grayish brown (10YR 5/2) sand; single grain; loose; about 3 percent gravel; many coarse distinct brown (7.5YR 4/4) and few fine prominent reddish brown (5YR 4/4) Fe concentrations and many medium faint light brownish gray (10YR 6/2) Fe depletions; moderately acid; gradual smooth boundary. (Combined thickness of Bw horizon is 25 to 91 cm)
C--122 to 203 cm; brown (10YR 5/3) sand; single grain; loose; about 3 percent gravel; common coarse distinct brown (7.5YR 4/4) and few fine prominent reddish brown (5YR 4/4) Fe concentrations and common medium faint light brownish gray (10YR 6/2) Fe depletions; moderately acid.
TYPE LOCATION: Benton County, Minnesota; about 3 miles west of Duelm, 2520 feet south and 1280 feet east of the northwest corner of Sec. 30, T.36N., R. 29 W.; USGS Cable quadrangle; lat. 45 degrees 34 minutes 54 seconds N. and long. 94 degrees 00 minutes 09 seconds W., NAD 27.
RANGE IN CHARACTERISTICS: Depth to free carbonates ranges from 102 to 203 cm or more. The mollic epipedon thickness ranges from 25 to 61 cm. The series control section averages less than 10 percent rock fragments, but some pedons have thin strata with as much as 15 percent rock fragments.
The Ap or A horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2. It is loamy sand, loamy fine sand, sand or fine sand. Reaction is slightly acid or moderately acid.
The Bw horizon has hue of 10YR or 2.5Y value of 3 to 5, and chroma of 2 to 4. The Bw horizon typically have faint to prominent redox features. It is loamy sand, loamy fine sand, sand or fine sand. Reaction ranges from slightly acid to strongly acid.
The C horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 to 4. It is sand or coarse sand. It is moderately acid to slightly alkaline.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: These soils are on plane to slightly concave positions on level to undulating outwash plains, stream terraces, and valley trains. Slopes range from 0 to 3 percent. The Glendorado soil formed in Des Moines Lobe sandy outwash of Late Wisconsinan Age. Mean annual air temperature ranges from about 3 to 8 degrees C. Mean annual precipitation is about 635 to 865 mm. Frost-free days range from 120 to 180. Elevation above sea level ranges from 245 to 455 meters.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Duelm, Hubbard, and Isan, soils which form the catena and drainage sequence with the Glendorado soils. The excessively drained Hubbard soils and the moderately well drained Duelm soils occupy more sloping areas. The poorly and very poorly drained Isan soils occupy lower landscape positions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. Surface runoff is negligible. Saturated hydraulic conductivity is 42.34 to 141.14 micrometers per second (6 to 20 inches per hour). This soil has season high saturation at depths of 25 cm during April to June in years of normal precipitation.
USE AND VEGETATION: Most areas are cropped to corn, soybeans, small grains, and hay. Native vegetation is mixed tall prairie grasses and deciduous forest.
DISTRIBUTION AND EXTENT: MLRA-91. Central and eastern Minnesota. This series is currently of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Benton County, Minnesota, 2007.
REMARKS: Diagnostic horizons and features recognized in this soil are: mollic epipedon - from the surface to 38 cm (Ap and A horizons); aquic subgroup - aquic conditions and redox features within 40 cm.
This soil was previously included in the Duelm series.