LOCATION NEEPER MOEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Hapludolls
TYPICAL PEDON: Neeper loam - on a slightly concave 4 percent slope in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; very dark gray (10YR 3/1) loam, gray (10YR 5/1) dry; moderate fine granular structure; friable; common fine roots; slightly acid; abrupt smooth boundary.
A1--6 to 13 inches; very dark gray (10YR 3/1) loam, gray (10YR 5/1) dry; moderate fine subangular blocky structure; friable; common fine roots; slightly acid; clear smooth boundary.
A2--13 to 20 inches; very dark grayish brown (10YR 3/2) loam, grayish brown (10YR 5/2) dry; weak fine subangular blocky structure; friable; few fine roots; moderately acid; clear smooth boundary. (Combined thickness of the A horizon is 10 to 24 inches.)
Bw1--20 to 31 inches; dark yellowish brown (10YR 3/4) clay loam; weak fine subangular blocky structure; firm; few fine roots; moderately acid; gradual smooth boundary.
Bw2--31 to 42 inches; dark yellowish brown (10YR 4/4) clay loam, weak fine subangular blocky structure; firm; few fine roots; moderately acid; gradual smooth boundary.
Bw3--42 to 51 inches; yellowish brown (10YR 5/4) clay loam; weak fine subangular blocky structure; firm; very few fine roots; slightly acid; gradual smooth boundary.
BCg--51 to 60 inches; yellowish brown (10YR 5/4) loam; common fine weak medium subangular blocky structure; firm; distinct dark grayish brown (10YR 4/2) Fe depletions; slightly acid.
TYPE LOCATION: Clark County, Missouri; about 3 miles north of Wayland; 540 feet west and 1480 feet north of the southeast corner of sec. 8, T. 65 N., R. 6 W.
RANGE IN CHARACTERISTICS: The mollic epipedon is 10 to 24 inches thick.
The Ap or A horizon has color value of 2 or 3 moist, 4 or 5 dry and chroma of 1 or 2. It commonly is loam, but includes silt loam or clay loam. Reaction is moderately acid to neutral. Some pedons have a BA horizon.
The Bw horizon has hue of 10YR or 7.5YR, value of 3 to 5 and chroma of 4 or 5 with 2 chroma Fe depletions below depths of 40 inches. It commonly is clay loam, but includes silt loam or loam. Reaction is moderately acid or slightly acid. The BCg horizon has color and texture similar to the Bw horizon.
COMPETING SERIES: These include the Arbor, Aredale, Bode, Clarion, Cresken, Everly, Farrar, Frontenac, Garmore, Kenyon, Limecreek, Liscomb, Moland, Ocheyedan, Ostrander and Rossfield series. Arbor, Cresken, Kenyon, Moland and Ostrander soils have 2B horizons with more than 2 percent coarse fragments. Aredale soils have a layer of sandy loam or loamy sand. Bode, Clarion, Everly, Farrar, Frontenac, Liscomb, Ocheyedan and Rossfield soils have carbonates in the lower part of the series control section. Garmore soils have more than 2 percent coarse fragments. Limecreek soils have a paralithic contact at less than 40 inches. In addition, these competing series have cooler mean annual soil temperature.
GEOGRAPHIC SETTING: Neeper soils are on lower footslope and toeslope positions. These soils formed in colluvium and slopes range from 2 to 7 percent. Mean annual temperature ranges from 52 to 57 degrees F., and mean annual precipitation ranges from 33 to 39 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Armstrong, Gara, Lindley and Vesser soils. Armstrong, Gara and Lindley soils do not have a mollic epipedon and are on more sloping positions above the Neeper soils. Vesser soils have an albic horizon and are on lower floodplain positions.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is medium. Permeability is moderate. The upper depth of an apparent water table is 4 to 6 feet during November to April.
USE AND VEGETATION: Most areas are used for cultivated crops. Some areas are used for pasture or hayland. Native vegetation is mixed grass and hardwood trees.
DISTRIBUTION AND EXTENT: Northeast Missouri and possibly southeastern Iowa. The series is inextensive, but some areas have been included in other mapping units in adjacent counties.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Clark County, Missouri, 1994.
REMARKS: Diagnostic horizons and features recognized in this series are: mollic epipedon - the zone from the surface of the soil to a depth of 20 inches (Ap, A1 and A2 horizons); cambic horizon - the zone from approximately 20 inches to 60 inches or more (Bw1, Bw2, Bw3 and BC horizons).