LOCATION SANDOVER MOEstablished Series
TAXONOMIC CLASS: Sandy over loamy, mixed, superactive, nonacid, mesic Aquic Udifluvents
TYPICAL PEDON: Sandover fine sand on a flood plain at an elevation of 825 feet, in a cultivated field with a slope of about 1 percent. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 9 inches; brown (10YR 4/3) fine sand; pale brown (10YR 6/3) dry; single grain; loose; common fine roots; very strongly acid; clear smooth boundary. (6 to 10 inches thick)
C--9 to 25 inches; brown (10YR 5/3) fine sand, with strata of very dark grayish brown (10YR 3/2); single grain; loose; few fine roots; strongly acid; abrupt wavy boundary. (12 to 36 inches thick)
2Cg1--25 to 32 inches; dark grayish brown (10YR 4/2) silt loam, with strata of grayish brown (10YR 5/2) and very dark grayish brown (10YR 3/2); massive, has distinct bedding planes; friable; common medium prominent reddish brown (5YR 4/4) masses of iron accumulation throughout; moderately acid; gradual smooth boundary.
2Cg2--32 to 45 inches; dark grayish brown (10YR 4/2) silt loam, with strata of grayish brown (10YR 5/2) and very dark grayish brown (10YR 3/2); massive, has distinct bedding planes; friable; common medium prominent strong brown (7.5YR 4/6) and reddish brown (5YR 4/4) masses of iron accumulation throughout; moderately acid; gradual smooth boundary.
2Cg3--45 to 60 inches; dark gray (10YR 4/1) silt loam, with strata of dark grayish brown (10YR 4/2) and grayish brown (10YR 5/2); massive, has distinct bedding planes; friable; common medium prominent dark reddish brown (2.5YR 3/4) masses of iron accumulation throughout; slightly acid.
TYPE LOCATION: Mercer County, Missouri, about 2.5 miles south of Princeton; 1750 feet east and 1350 feet south of the northwest corner of Sec. 9, T. 64 N., R. 24 W.; Mill Grove quadrangle, lat. 40 degrees 21 minutes 46 seconds N and long. 93 degrees 36 minutes 25 seconds W.
RANGE IN CHARACTERISTICS: Depth to the loamy horizon ranges from 20 to 40 inches. Reaction ranges from very strongly acid to slightly acid and is moderately acid or slightly acid in some part of the 10 to 40 inch control section.
The A horizon has color value of 3 or 4 and chroma of 2 to 4. It is fine sand, sand, loamy fine sand or loamy sand and in some places, loam.
The C horizon has color value of 3 to 6 and chroma of 2 to 4. It is fine sand, sand, loamy fine sand or loamy sand.
The 2Cg horizon has color value of 3 to 5 and chroma of 1 to 3. Masses of iron have higher value and chroma. It typically is silt loam or silty clay loam, however, some pedons have thin strata of loam or sandy loam.
COMPETING SERIES: There are no competing series. Similar soils are the Floris, Klum and Nodaway series. Floris soils have more silt and clay in the upper part of the series control section. Klum soils have more silt and clay in the upper part of the series control section and have a darker colored surface layer. Nodaway soils are fine-silty.
GEOGRAPHIC SETTING: Sandover soils are on flood plains. Slopes are 0 to 2 percent and are adjacent to stream channels that have been straightened. These soils formed in mostly sandy over loamy alluvium. The mean annual temperature ranges from 50 to 54 degrees and mean annual precipitation ranges from 32 to 35 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Humeston, Nodaway and Zook soils. Nodaway soils are on similar areas. Humeston soils formed on slightly concave parts of second bottoms and have more clay. Zook soils are on lower or slightly depressional areas and have more clay.
DRAINAGE AND PERMEABILITY: Moderately well drained. Surface runoff is slow. Permeability is rapid in the upper part and moderate in the lower part. In undisturbed areas, the upper depth of an apparent water table is 2.0 to 3.0 feet during March to June in most years.
USE AND VEGETATION: These soils are cultivated. Corn, soybeans and winter wheat are the major crops. These soils are of recent origin, so vegetation has had minor influence on soil properties.
DISTRIBUTION AND EXTENT: Along the streams in North Central Missouri and possibly in adjoining states. They are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Mercer County, Missouri, 1995.
REMARKS: NSSL Sample No. S91MO129009. Sandover soils were included with the Nodaway soils in previous surveys.
Diagnostic features and horizons recognized in this series are ochric epipedon - the zone from the surface of the soil to a depth of 9 inches (Ap horizon); udic moisture regime.