Nebraska Soils Field Trip - Virginia Tech

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4th IUSS Soil Classification Conference Field Tour Guidebook Mean annual precipitation--66 to 81 centimeters (26 to 32 inches) Frost-free period--145 to 175 days GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dow, Ida, Napier, and Steinauer soils. Dow--are at lower elevations on side slopes, have carbonates within a depth of 25 centimeters (10 inches), and have a matrix chroma of 2 in the lower two thirds of the series control section Ida--are at lower elevations on side slopes, have carbonates within a depth of 25 centimeters (10 inches), and have a matrix chroma greater than 2 in the lower two thirds of the series control section Napier--are at lower elevations on base slopes and have a mollic epipedon 61 to 102 centimeters (24 to 40 inches) thick Steinauer--are at lower elevations on side slopes, have carbonates within a depth of 25 centimeters (10 inches), and have a sand content of 20 to 52 percent in the particle-size control section DRAINAGE AND PERMEABILITY: Drainage class--well drained--saturation does not occur within a depth of 1.8 meters (6 feet) during the wettest periods of most years Saturated hydraulic conductivity--moderately high Surface runoff potential--negligible to high USE AND VEGETATION: Most areas are cultivated. Some steeply sloping areas are forested or pastured. The principal crops are corn, soybeans, small grains, and hay. The native vegetation is big bluestem, little bluestem, indiangrass, switchgrass, and other grasses of the tall grass prairie. DISTRIBUTION AND EXTENT: Physiographic Division--Interior Plains Physiographic Province--Central Lowland Physiographic section--Dissected till plains MLRAs--Nebraska and Kansas Loess-Drift Hills (106) and Iowa and Missouri Deep Loess Hills (107) LRR M; western Iowa, northeastern Kansas, eastern Nebraska, and possibly northwestern Missouri along the Missouri River Extent--large MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota SERIES ESTABLISHED: Monona County, Iowa, 1957. REMARKS: Particle-size control section--the zone from a depth of 25 to 100 centimeters (10 to 40 inches) (A, Bw1, Bw2, and C horizons); series control section--the zone from the surface to a depth of 150 centimeters (0 to 60 inches) (Ap, A, Bw1, Bw2, and C horizons). 98
4th IUSS Soil Classification Conference Field Tour Guidebook Diagnostic horizons and features recognized in this pedon: mollic epipedon--the zone from the surface to a depth of 38 centimeters (15 inches) (Ap and A horizons); cambic horizon--the zone from a depth of 38 to 76 centimeters (15 to 30 inches) (Bw1 and Bw2 horizons); udic moisture regime. Cation-exchange class is supported by lab sample number S87IA-155-003, NSSL. Taxonomy version--Keys to Soil Taxonomy, ninth edition, 2003 The loess deposits are typically 24 to 32 feet thick but is as thin as 6 feet on some convex side slopes and as thin as 5 feet on loess covered stream terraces ADDITIONAL DATA: Laboratory data--Iowa State University, Ames, IA, many pedons Laboratory data--National Soil Survey Laboratory, Lincoln, Nebraska, many pedons (http://ssldata.sc.egov.usda.gov/) National Cooperative Soil Survey U.S.A. 99
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Soil Taxonomy Fine-loamy, mixed, ac
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Nebraska Soils Field Trip - Virginia Tech

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