LOCATION BRENSALL MNEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Oxyaquic Argiudolls
TYPICAL PEDON: Brensall clay loam - on a nearly level slope in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; black (10YR 2/1) clay loam, very dark gray (10YR 3/1) dry; moderate fine and medium subangular blocky structure; firm; common fine roots; about 2 percent rock fragments; neutral; abrupt smooth boundary. (7 to 14 inches thick)
Bt--8 to 15 inches; brown (10YR 4/3) clay loam; moderate fine and medium subangular blocky structure; firm; few fine roots; common faint very dark grayish brown (10YR 3/2) clay films on faces of peds; about 2 percent rock fragments; neutral; gradual smooth boundary. (6 to 16 inches thick)
Bk1--15 to 26 inches; olive brown (2.5Y 4/4) clay loam; weak fine and medium subangular blocky structure; firm; many fine masses of carbonates; about 2 percent rock fragments; violently effervescent; moderately alkaline; gradual smooth boundary.
Bk2--26 to 48 inches; grayish brown (2.5Y 5/2) clay loam; weak fine and medium subangular blocky structure; firm; common medium faint light olive brown (2.5Y 5/3) and common medium prominent yellowish brown (10YR 5/6) redox concentrations; common fine masses of carbonates; about 2 percent rock fragments; violently effervescent; moderately alkaline; gradual smooth boundary. (Combined thickness of the Bk horizons 12 to 36 inches)
BC1--48 to 60 inches; grayish brown (2.5Y 5/2) clay loam; moderately coarse and extremely coarse prismatic parting to moderate medium and coarse angular blocky structure; firm; common medium distinct light olive brown (2.5Y 5/6) redox concentrations; about 2 percent rock fragments; strongly effervescent; moderately alkaline; gradual smooth boundary.
BC2--60 to 80 inches; light olive brown (2.5Y 5/4) clay loam; moderately coarse and extremely coarse prismatic parting to moderate medium and coarse angular blocky structure; firm; common medium distinct grayish brown (2.5Y 5/2) redox depletions and common medium prominent yellowish brown (10YR 5/6) redox concentrations; about 2 percent rock fragments; strongly effervescent; moderately alkaline.
TYPE LOCATION: Yellow Medicine County, Minnesota; 1558 feet east and 70 feet north of southwest corner of section 22, T. 114 N., R. 45 W.; USGS Canby quadrangle; lat. 44 degrees 39 minutes 36 seconds N.; long. 96 degrees 16 minutes 14 seconds W., NAD 83.
RANGE IN CHARACTERISTICS: Depth to calcium carbonate ranges from 14 to 30 inches. Thickness of the mollic epipedon ranges from 7 to 16 inches. Rock fragments range from 1 to 8 percent throughout, mostly pebble in size.
The A horizon has hue of 10YR, value of 2 or 3, and chroma of 1or 2. It typically is clay loam, but the range includes loam. It is neutral or slightly acid.
The Bt horizon has hue of 10YR or 2.5Y, value of 3 to 5, and chroma of 2 to 4. It is neutral or slightly alkaline. Peds in the Bt horizon have common or many, faint or distinct clay films.
The Bk horizons have hue of 2.5Y, value of 4 to 6, and chroma of 2 to 4. They are clay loam or loam. They are moderately alkaline and contain both diffuse and segregated carbonates. There are common to many redox features above a depth of 40 inches.
The C horizon has hue of 2.5Y, value of 4 to 6, and chroma of 2 to 6. It is clay loam or loam. It is slightly alkaline or moderately alkaline. There are common to many redox features.
COMPETING SERIES: These are the Knute, Oakcreek and Reiner series. Knute soils have less than 18 percent clay in the Bk and C horizons. Oakcreek soils have sandy 2C horizons. Reiner soils have less than 20 percent clay in the A horizon.
GEOGRAPHIC SETTING: Brensall soils are nearly level to gently undulating on uplands. Slope gradients typically range from 1 to 4 percent. The soils formed in calcareous glacial till. Mean annual air temperature ranges from 38 to 45 degrees F, and the mean annual precipitation ranges from19 to 27 inches. Annual frost free days are 120 to 170. Elevation ranges from 890 to 1950 feet above mean sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aastad, Forman and Parnell soils. The Aastad soils are in slightly concave positions. The Forman soils are on higher, better drained slopes. The Parnell soils are in drainways and depressions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. Surface runoff is low. Saturated hydraulic conductivity is .2 to .6 inches per hour. The apparent seasonal high saturation is at a depth of 24 to 40 inches at some time from March to June in normal years.
USE AND VEGETATION: Most areas are cultivated. The main crops are corn and soybeans. Native vegetation is tall grass prairie.
DISTRIBUTION AND EXTENT: Southwestern Minnesota.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Lincoln County, Minnesota, 2006.
REMARKS: Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from the surface of the soil to a depth of 8 inches (Ap horizon); argillic horizon - the zone 8 to 15 inches (Bt horizon); calcic horizon - the zone from 15 to 48 inches (Bk horizons).
This soil was included with Aastad or Forman soils in the past.