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Official Series Description -LESTER Series LOCATION LESTER Established Series Rev. AGG-TCJ-KDS 05/2001 MN+IA LESTER SERIES Page l of 3 The Lester series consists of very deep, well drained soils that formed in calcareous loamy glacial till on till plains and moraines. These soils have moderate permeability. Their slopes range from 5 to 70 percent. Mean annual precipitation is about 28 inches. Mean annual temperature is about 47 degrees F. TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Mollie Hapludalfs TYPICAL PEDON: Lester loam with a convex slope of about 9 percent on a ground moraine in a cultivated field. (Colors are for moist soil unless otherwise noted.) Ap--0 to 7 inches; very dark grayish brown (lOYR 3/2) loam, grayish brown (lOYR 5/2) dry; moderate fine subangular blocky structure; friable; many fine roots; about 3 percent gravel; slightly acid; abrupt smooth boundary. (6 to 10 inches thick) Btl--7 to 21 inches; brown (lOYR 4/3) clay loam; moderate medium subangular blocky structure; firm; many very fine roots; common very dark grayish brown (l0YR 3/2) clay films on faces ofpeds and few very dark gray (1 0YR 3/1) organic coats on faces of peds; about 2 percent gravel; slightly acid; clear smooth boundary. Bt2--21 to 38 inches; dark yellowish brown (lOYR 4/4) clay loam; moderate medium subangular blocky structure; friable; common fine roots; common dark grayish brown (l0YR 4/2) clay films on faces of peds and few very dark brown (l0YR 2/2) organic coats on faces ofpeds; about 3 percent gravel; slightly acid; gradual smooth boundary. (Combined Bt horizon is 10 to 40 inches.) Bkl--38 to 50 inches; yellowish brown (l0YR 5/4) loam; weak medium subangular blocky structure; friable; few fine roots; common very pale brown (1 0YR 8/2) carbonate threads; about 2 percent gravel; violently effervescent; slightly alkaline; clear wavy boundary. Bk2--50 to 60 inches; yellowish brown (l0YR 5/4) loam; weak medium subangular blocky structure; friable; common fine distinct yellowish brown (l0YR 5/6) relict Fe concentrations; common very pale brown (1 0YR 8/2) carbonate threads; about 2 percent gravel; violently effervescent; slightly alkaline; clear wavy boundary. C--60 to 80 inches; yellowish brown (1 0YR 5/4) loam; ; massive; friable; common medium distinct yellowish brown (lOYR 5/6) relict Fe concentrations and few fine distinct light brownish gray (l0YR 6/2) relict Fe depletions; about 1 percent gravel; strongly effervescent; slightly alkaline. TYPE LOCATION: Wright County, Minnesota; about 3 miles west of Otsego, 1460 feet south and 200 feet west of the northeast comer of Sec. 15, T.121 N., R.24 W.; USGS Big Lake quadrangle; lat. 45 degrees 17 minutes 29 seconds N.; long. 93 degrees 41 minutes 3 seconds W., NAD27 http://ortho.ftw.nrcs.usda.gov/cgi-bin/osd/osdname.cgi?-P 8/16/2006