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Zimmerman Soil Series (continued) The Bw horizon has hue of 10YR, value of 4 to 6, and chroma of 2 to 6. It has few to many, faint to prominent redox features. The reddish brown Fe concentrations commonly are weakly cemented. Colors with chromas of 2 or less occur as either the matrix or as Fe depletions above a depth of 40 inches. The Bw horizon typically is fine sand, but sand, loamy fine sand or loamy sand in the upper part is within the range. It is strongly acid or moderately acid. The C horizon has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 2 to 4. It has common or many redox features. It is fine sand or sand. It is strongly acid to slightly acid. COMPETING SERIES: These are the Aylmer, Hiwood, Meehan, Poppleton, Redby, Rushlake, and Winterfield series. Aylmer, Poppleton, and Rushlake soils have pH greater than 6.0 in the series control section. Hiwood, Poppleton, and Redby soils are substantially drier in the soil moisture control section during the 120 days following the summer solstice. Hiwood soils also contain more than 5 percent coarse and very coarse sand. Meehan and Rushlake soils have more than 5 percent coarse and very coarse sand in the particle -size control section. Winterfield soils have an irregular decrease in organic matter with increasing depth. GEOGRAPHIC SETTING: Lino soils have slightly concave to slightly convex slopes on glacial outwash plains. Slopes range from 0 to 3 percent. They formed in sandy sediments of glacial outwash or eolian origin. The deposits are of Late Wisconsinan Age. Mean annual air temperature ranges from 37 to 45 degrees F. Mean annual precipitation ranges from 24 to 33 inches. Frost -free days range from 90 to 150. Elevation above sea level ranges from 700 to 1400 feet. GEOGRAPHICALLY ASSOCIATED SOILS: These are the poorly and very poorly drained Isanti soils, the excessively drained Zimmerman and Sartell soils, and the moderately well drained Friendship soils which form a hydrosequence with the Lino soils. The poorly drained Blomford soils, the well drained Anoka soils, and the somewhat poorly drained Soderville soils are also closely associated in some places. DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Surface runoff is very low. Permeability is rapid. An apparent water table is at 1.5 to 3.0 feet during November to June in most years. USE AND VEGETATION: Approximately 50 percent of these soils are cropped to soybeans and corn. The remaining areas are in pasture, forested pasture, or forest. Native vegetation was deciduous forest with red and bur oak, aspen, and some water tolerant grasses being the dominant plants. DISTRIBUTION AND EXTENT: East - central Minnesota and west - central Wisconsin. MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota SERIES ESTABLISHED: Isanti County, Minnesota, 1956. REMARKS: Diagnostic horizons and features recognized in this pedon are: ochric epipedon - the zone from the surface to 7 inches (Ap horizon); udic moisture regime; aquic subgroup - low chroma redox depletions above 1 meter. The Preserve Conservation Development - Restoration and Management Plan B -9