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length. These soils formed in calcareous loamy glacial till. Montmorillonite is the dominant clay <br /> mineral in the glacial till. Mean annual temperature is 45 to 50 degrees, and mean annual <br /> precipitation is 27 to 33 inches. <br /> GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ames, Dundas, Hamel, Luther, <br /> and Nessel soils which are members of a toposequence with the Hayden soils. Moderately well <br /> drained Nessel soils have plane or slightly convex slopes. Poorly drained Ames and Dundas soils <br /> have slightly concave to slightly convex slopes with gradient of less than 2 percent. Poorly <br /> drained Hamel soils are on toe slopes. Organic soils are common associates in some places. <br /> DRAINAGE AND PERMEABILITY: Well drained. Runoff is medium and rapid. <br /> Permeability is moderate. <br /> USE AND VEGETATION: Mostly cleared and cultivated to corn, soybeans, small grain, and <br /> hay. Native vegetation was deciduous forest of maple, basswood, oak, and elm. <br /> DISTRIBUTION AND EXTENT: Southeastern Minnesota and in central Iowa. Extensive. <br /> MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota <br /> SERIES ESTABLISHED: Hennepin County, Minnesota, 1929. <br /> ADDITIONAL DATA: Refer to Minnesota Agricultural Experiment Station Central File Code <br /> No. 967 for results of some laboratory analysis of the typical pedon. <br /> Svoboda Ecological Resources 1350 Orono Oaks Drive <br /> Project No.: 2007-061-03 30 Ron Ridgeway <br />