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to 3 pereent. Mean annu�l air temperature ranges from 45 to 52 degrees F. Mean annual <br /> _ precipitation ranges from 25 to 32 inches. Frost-free days range from !25 to 165. � <br /> Elevation �bove sea level ranges From 700 to I600 feet, <br /> GEOGRAPHICALLY ASSOCIATED SOILS: The main ones are tl�e Cordova, <br /> Lester, and Hamel soils, These soils formed in materials simifar to the Le Sueur soils and <br /> are members of a hydrosequence with the Le Sueur soiis. The poorly drained Cordova <br /> _ and Hamei soils are cammon associates on adjacent nearly level slopes. The well drained <br /> Lester soils are the most common associate on the undulating to gently undulating slopes. <br /> - The well drained Ha den soils and the pooriy drained Dundas soils are associates in some <br /> , places. <br /> � . DRAINAGE AND PERMEABILITY: Somewhat pooriy drained. Surface runoff is <br /> . 1ow. Permeability is moderate. An apparent water table is at 1.5 to 2.5 feet during <br /> November to June in most years. . <br /> , � USE AND VEGETATION: Mostly under cultivation with corn, soybeans, grain, and <br /> ' hay the principal crops. Native.vegetation was deciduous forest, dominantly eim, <br /> basswood, and maple in some areas, and oak with prairie and brush understory in the <br /> timber outliers within the prairie. ' , <br /> � DISTRIBUTION AND EXTENT: South-central Minnesota and north-central Iowa. <br /> � This soil is extensive. � <br /> MLRA OFFICE RESPONSIBLE: St. Paul,Minnesota <br /> SERIES ESTABLISHED: Le Sueur County,Minnesota, 1944. . <br /> . REMARKS: Diagnostic horizans and features recognized in this pedon are: moilic <br /> epipedon-the zone from the surface to 13 inches (A and AB horizons); argillic horizon- <br /> the zone from 13 to 41 inches(Bt horizons); aquic subgroup-hue of 1 QYR and chroma of <br /> . 2 immediately below mallic epipedon. <br /> � Somewhat poorly drained matches depth to redox (2 chroma at 17 inches) and taxonomic 1 <br /> ` . class (Aquic subgroup)closer than the previous moderately well drained class. � <br />