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' Official Series Description - LERDAL Series Page 3 of 3 <br /> ' DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Surface runoff is high to very high. <br /> Permeability is slow. The perched seasonal high water table is 1.5 to 2.5 feet during April to May in <br /> most years. <br /> ' USE AND VEGETATION: Most are used as cropland. Corn, soybeans, and alfalfa are the commonly <br /> grown crops. Native vegetation is savanna with oaks being the dominant kind of tree. <br /> DISTRIBUTION AND EXTENT: Eastern edge of Des Moines lobe in Minnesota. Moderately <br /> extensive. <br /> ' MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota <br /> ' SERIES ESTABLISHED: Hennepin County, Minnesota, 1969. <br /> REMARKS: Diagnostic horizons and features in this pedon are: ochric epipedon- from the soil surface <br /> ' to a depth of 7 inches -too thin for a mollic horizon(Ap); albic horizon-the zone from 7 to 9 inches <br /> (E); argillic horizon-the zone from 8 to 42 inches(Btl, Bt2, Btgl, Btg2). <br /> This pedon has been reclassified to Fine, smectitic mesic Aeric Vertic Epiaqualf on 12/96 <br /> ' National Cooperative Soil Survey <br /> U.S.A. <br /> http://ortho.ftw.nres.usda.gov/cgi-bin/osd/osdname.cgi?-P 11/2/2004 <br />