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LE SUEUR SERIES <br /> The Le Sueur series consists of very deep, somewhat poorly drained soils that formed in calcareous loamy <br /> glacial till on moraines.These soils have moderate permeability. Their slopes range from 1 to 3 percent. <br /> Mean annual precipitation is about 29 inches. Mean annual air temperature is about 47 degrees F. <br /> TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquic Argiudolls <br /> TYPICAL PEDON: Le Sueur clay loam with a 2 percent plane slope on glacial till plain <br /> in a pastured woodlot. (Colors are for moist soil unless otherwise noted.) <br /> Ap--O to 12 inches; black (lOYR 2/1) clay loam, dark grayish brown (IOYR 4/2) dry; <br /> moderate medium granular blocky structure parting to moderate fine subangular; friable; <br /> about 2 percent gravel; s1ig11tly acid; abrupt smooth boundary. (6 to 12 inches thick) <br /> AB--12 to 17 inches; very dark gray (lOYR 3/1) and about 2S percent dark yellowish <br /> brown (lOYR 4/4) clay loam, grayish brown (lOYR 5/2) dry; moderate fine subangular <br /> blocky structure; friable; about 2 percent gravel; slightly acid; clear smooth boundary. (0 <br /> to 8 inches thick) <br /> Btl--l7 to 24 inches; olive brown (2.SY 4/3) clay loam; moderate medium prismatic <br /> structure parting to strong fine subangular blocky; friable; common dark brown (lOYR <br /> 3/3) clay films on faces of peds; about 2 percent gravel; few fine faint dark grayish brown <br /> (2.SY 4/2) Fe depletions; slightly acid; clear smooth boundary. <br /> Bt2--24 to 37 inches; olive brown (2.SY 4/3) clay loam; weak medium prismatic <br /> structure parting to moderate fine subangular blocky; friable; common very dark grayish <br /> brown (2.SY 3/2) clay films on faces of peds and in pores; about 4 percent gravel; few <br /> fine faint grayish brown (2.SY 5/2) Fe depletions and few fine prominent dark yellowish <br /> brown (lOYR 4/6) Fe concentrations; neutral; abrupt smooth boundary. (Combined <br /> thickness of the Bt horizon is 16 to 45 inches.) <br /> Bk--37 to 46 inches; light olive brown (2.SY 5/4) loam; weak medium subangular blocky <br /> structure; friable; common light gray pale brown (2.SY 7/2) soft masses of carboante <br /> throughout and carbonate threads; about 5 percent gravel; common medium distinct <br /> grayish brown (2.SY 5/2) Fe depietions and common medium distinct light olive brown <br /> (2.SY 5/6) Fe concentrations; strongly effervescent; slightly alkaline; clear smooth <br /> boundary. <br /> C--46 to 80 inches; grayisli brown (2.SY 5/2) loam; weak medium subangular blocky <br /> structure parting to massive; friable; common light gray pale brown (2.SY 7/2) soft <br /> masses of carbonate throughout and carbonate threads; about 5 percent gravel; many <br /> common medium prominent dark yellowish brown (I OYR 4/4) and dark yellowish brown <br /> (lOYR 4/6) Fe concentrations; strongly effervescent; slightly alkaline. <br /> TYPE LOCATION: Waseca County, Minnesota; about 9 miles south of Waseca; 2000 <br /> feet south and 1950 feet south of northwest corner of sec. 26, T. 108 N., R. 22 W.; USGS <br />