LOCATION FRIBERG MNEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Argiaquolls
TYPICAL PEDON: Friberg loam with a 1 percent concave northwest facing slope in a cultivated field. (Colors are for moist soils unless otherwise stated.)
Ap--0 to 9 inches; black (10YR 2/1) loam, dark gray (10YR 4/1) dry; weak medium subangular blocky structure; friable; common to many fine and medium roots; about 1 percent gravel; neutral; abrupt smooth boundary.
A--9 to 19 inches; black (10YR 2/1) loam, dark gray (10YR 4/1) dry; weak fine and medium subangular blocky structure; friable; common to many fine and medium roots; about 1 percent gravel; neutral; clear wavy boundary. (Combined thickness of A horizons is 10 to 30 inches.)
Btg1--19 to 24 inches; very dark gray (10YR 3/1) clay loam, dark gray (10YR 4/1) dry; moderate medium subangular blocky structure; firm; few fineroots; common continuous faint black (10YR 2/1) clay films on faces of peds; about 1 percent gravel; neutral; clear wavy boundary.
2Btg2--24 to 41 inches; grayish brown (2.5Y 5/2) sandy clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; common medium distinct light olive brown (2.5Y 5/6) Fe concentrations; common continuous distinct very dark gray (10YR 3/1) clay films on faces of peds and in old root channels and pores; about 5 percent gravel; neutral; gradual wavy boundary.
2Btg3--41 to 47 inches; grayish brown (2.5Y 5/2) sandy clay loam; weak coarse prismatic structure parting to weak medium subangular blocky; firm; common medium distinct light olive brown (2.5Y 5/6) Fe concentrations; few patchy distinct very dark gray (10YR 3/1) clay films on faces of peds and in old root channels and pores; about 3 percent gravel; neutral; clear wavy boundary. (Combined thickness of the 2Btg horizons is 10 to 35 inches.)
2Cg--47 to 80 inches; grayish brown (2.5Y 5/2) fine sandy loam; massive; friable; many medium prominent yellowish brown (10YR 5/8) Fe concentrations; few distinct black organic fillings in old root channels; about 6 percent gravel; slightly effervescent; slightly alkaline.
TYPE LOCATION: Otter Tail County, Minnesota, about 11 miles Northeast of Fergus Falls; 1650 feet west and 300 feet south of the NE corner of Section 6, T.133 N., R.41 W.; USGS Wall Lake quadrangle; Lat. 46 degree 22 minutes 06 seconds N.; Lon. 95 degrees 53 minutes 24 seconds W., NAD27.
RANGE IN CHARACTERISTICS: The depth to free carbonates range from 20 to 80 inches. The thickness of the upper sediment is 20 to 40 inches. The mollic epipedon ranges from 16 to 42 inches thick and includes the upper part of the argillic horizon. The particle size control section ranges from 18 to 35 percent clay and more than 35 percent fine sand and coarser. Rock fragments make up 1 to 3 percent, by volume, of the upper mantle and 3 to 10 percent, by volume, of the lower part.
The A horizon has hue of 10YR through 5Y or is neutral, value of 2 or 3, and chroma of 0 through 2. It is loam, fine sandy loam, sandy loam, or silt loam. It has ped coatings of fine sand grains and silt particles in the lower part of the A horizon in some pedons. Reaction is moderately acid to neutral, but in some pedons the upper part of the A horizon may be slightly alkaline because of erosion sediments from the adjacent slopes.
Some pedons have an E horizon 2 to 6 inches thick.
The Btg horizons have hue of 10YR to 5Y; value of 2 to 5 and chroma of 1 or 2. It is clay loam or silty clay loam high in sand. Reaction is moderately acid to neutral.
The 2Btg horizon has hue of 10YR through 5Y, value of 2 to 5 and chroma of 1 or 2. It is sandy clay loam or loam high in sand content. Reaction is moderately acid to neutral.
Some pedons have a 2Bkg horizon.
The 2Cg horizon has a hue of 2.5Y or 5Y, value of 4 to 6 and chroma of 1 to 6. It is loam, fine sandy loam, or sandy loam. Reaction is slightly alkaline or moderately alkaline.
COMPETING SERIES: These are the Alamosa, Brandsvold, and Smiley series. Alamosa soils have less than 35 percent fine sand and coarser in the particle size control section. Brandsvold and Smiley soils have mollic epipedons less than 16 inches thick.
GEOGRAPHIC SETTING: Friberg soils are on plain to concave swale positions on moraines primarily of the Wadena lobe of the Wisconsin Age glaciation. They formed in loamy colluvium and loamy glacial till. Slope gradients range from 0 to 2 percent. Mean annual temperature ranges from 38 to 45 degrees F. Mean annual precipitation ranges from 22 to 27 inches. Frost-free days range from 90 to 150. Elevation above sea level ranges from 675 to 1950 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chapett and Weetown soils. The Chapett soils are well drained and the Weetown soils are moderately well drained. Both are on higher landscape positions.
DRAINAGE AND PERMEABILITY: Poorly drained and very poorly drained. Surface runoff is slow. Permeability is moderate. Depth to seasonal high water table is .5 to 1.5 feet on the poorly drained phase and +1 to .5 on the very poorly drained phase at some time from November to July in normal years.
USE AND VEGETATION: Much of this soil is cropped to corn, small grain, hay and soybeans. Some areas are in woodland or pasture. Native vegetation is mixed prairie grasses and hardwoods.
DISTRIBUTION AND EXTENT: Northwest and West Central Minnesota. Inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Otter Tail County, Minnesota, 1996.
REMARKS: Diagnostic properties and features recognized in this soil are mollic epipedon - the zone from the surface to a depth of 24 inches (Ap, A and Btg1 horizons); argillic horizon - the zone from 19 to 47 inches (Btg1, 2Btg1, 2Btg2 horizons); Aquic moisture regime with low chroma and mottles in the argillic horizon.
ADDITIONAL DATA: Refer to Minnesota Agricultural Experiment Station CFC No. 4440 for laboratory results of the typical pedon. Soil Interpretation Record number MN0608.