Nebraska Soils Field Trip - Virginia Tech

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).
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