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,, , <br /> LESTER SERIES <br /> The Lester series consists of very deep,well drained soils that formed in calcareous loamy glacial till on till <br /> plains and moraines.These soils have moderate permeability.Their slopes range from 5 to 70 percent. <br /> Mean annual precipitation is about 28 inches.Mean annual temperature is about 47 degrees F. <br /> TAXONOMIC CLASS: Fine-loamy, mixed, superactive,mesic Mollic Hapludalfs <br /> TYPICAL PEDON: Lester loam with a convex slope of about 9 percent on a ground <br /> moraine in a cultivated field. (Colors are for moist soil unless otherwise noted.) <br /> Ap--O to 7 inches;very dark grayish brown (lOYR 3/2) loam, grayish brown(lOYR 5/2) <br /> dry; moderate fine subangular blocky structure; friable;many fine roots;about 3 percent <br /> � gravel; slightly acid; abrupt smooth boundary.(6 to 10 inches thick) <br /> Btl--7 to 21 inches;brown(lOYR 4/3)clay loam; moderate medium subangular blocky <br /> structure;firm;many very fine roots; common very dark grayish brown(lOYR 3/2)clay <br /> films on faces of peds and few very dark gray(lOYR 3/1)organic coats on faces of peds; <br /> about 2 percent gravel;slightly acid;clear smooth boundary. <br /> Bt2--21 to 38 inches;dark yellowish brown(lOYR 4/4)clay loam;moderate medium <br /> subangular blocky structure; friable;common fine roots; common dark grayish brown <br /> (lOYR 4/2)clay films on faces of peds and few very dark brown(lOYR 2/2)organic <br /> coats on faces of peds; about 3 percent gravel;slightly acid; gradual smooth boundary. <br /> (Combined Bt horizon is 10 to 40 inches.) <br /> Bk1--38 to 50 inches;yellowish brown(lOYR 5/4) loam;weak medium subangular <br /> blocky structure; friable; few fine roots;common very pale brown(lOYR 8/2)carbonate <br /> threads; about 2 percent gravel;violently effervescent; slightly alkaline;clear wavy <br /> , boundary. <br /> Bk2--50 to 60 inches; yellowish brown(l 0YR 5/4) loam;weak medium subangular <br /> blocky structure; friable; common fine distinct yellowish brown (lOYR 5/6)relict Fe <br /> concentrations; common very pale brown(lOYR 8/2)carbonate threads; about 2 percent <br /> gravel;violently effervescent; slightly alkaline;clear wavy boundary. <br /> C--60 to 80 inches; yellowish brown(lOYR 5/4) loam; ;massive; friable;common <br /> � medium distinct yellowish brown(I OYR 5/6)relict Fe concentrations and few fine <br /> distinct light brownish gray(lOYR 6/2)relict Fe depletions;about 1 percent gravel; <br /> strongly effervescent;slightly alkaline. <br /> � TYPE LOCATION: Wright County,Minnesota;about 3 miles west of Otsego, 1460 <br /> feet south and 200 feet west of the northeast corner of Sec. 15,T.121 N.,R24 W.; USGS <br /> Big Lake quadrangle; lat. 45 degrees 17 minutes 29 seconds N.; long. 93 degrees 41 <br /> minutes 3 seconds W.,NAD27 <br /> RANGE IN CHARACTERISTICS: Depth to free carbonates ranges from 20 to 54 <br /> inches. Rock fragments of mixed lithology comprise 1 to 8 percent of the volume of the <br /> control section. <br /> i <br />