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Riceville, Skyberg, and Havana soils formed in two distinct materials that are separated <br /> by a stone line. Romulus soils have redder hue. Schley soils have thicker sola and contain <br /> less clay. Ames soils contain more clay. Cordova soils have mollic epipedons. Shields <br /> soils have fine textures. <br /> GEOGRAPHIC SETTING: Dundas soils are on level or nearly level, plane to slightly <br /> convex slopes on end or ground moraines. They formed mostly in friable calcareous, <br /> glacial till of Late Wisconsin Age. In some pedons the upper part of the solum apparently <br /> formed in somewhat modified glacial tilL The climate is humid continental with warm <br /> summers and cold winters. Mean annual temperature is about 45 to 50 degrees F., and <br /> mean annual precipitation is about 28 to 32 inches. <br /> GEOGRAPHICALLY ASSOCIATED SOILS: These are Hayden, Nessel, and Hamel <br /> soils which are members of a hydro sequence with the Dundas soils. Well drained <br /> Hayden soils are on the more sloping areas. Moderately well drained Nessel soils are on <br /> slightly elevated flats and gentle slopes. Poorly drained Hamel soils are on toe slopes. <br /> DRAINAGE AND PERMEABILITY: Somewhat poorly and poorly drained. Surface <br /> runoff is slow. Permeability is moderately slow. <br /> USE AND VEGETATION: Mostly cropped to corn, soybeans, small grains, and hay. <br /> Significant areas are in pasture or farested pasture. Native vegetation was miXed <br /> deciduous forest and prairie grass. <br /> DISTRIBUTION AND EXTENT: Southern and central Minnesota and north central <br /> Iowa. Moderately extensive. <br /> MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota <br /> SERIES ESTABLISHED: Scott County, Minnesota, 1957. <br /> REMARKS: The Dundas series was classified as a Planosol Gray Brown Podzolic <br /> intergrade in the former system. <br /> Classification only was changed 5/94. Competing series and other updates will be made <br /> later. <br /> ADDITIONAL DATA: Refer to MAES Central File Code No. 994 for some results of <br /> laboratory analysis of the typical pedon, and to Nos. 743, 829, and 830 for some data on a <br /> pedon from Wright County and two pedons from Hennepin County. <br />