LOCATION KENMOOR MO+IAEstablished Series
TAXONOMIC CLASS: Sandy over clayey, mixed, superactive, calcareous, mesic Oxyaquic Udifluvents
TYPICAL PEDON: Kenmoor loamy fine sand - on a level flood plain under cultivation. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 15 centimeters; dark grayish brown (10YR 4/2) loamy fine sand, light brownish gray (10YR 6/2) dry; weak fine granular structure; very friable; common fine roots; neutral; abrupt smooth boundary. (10 to 20 centimeters thick)
C--15 to 71 centimeters; stratified grayish brown (10YR 5/2) loamy fine sand and fine sand; single grain; loose; common fine roots; strongly effervescent; slightly alkaline; abrupt smooth boundary. (25 to 86 centimeters thick)
2Ab--71 to 94 centimeters; very dark grayish brown (10YR 3/2) silty clay; moderate fine and very fine angular and subangular blocky structure; firm; few fine roots; slightly effervescent; slightly alkaline; clear smooth boundary. (0 to 30 centimeters thick)
2Bgb--94 to 170 centimeters; dark grayish brown (10YR 4/2) silty clay; moderate medium angular blocky structure; firm; common medium prominent yellowish brown (10YR 5/6) masses of oxidized iron throughout; strongly effervescent; slightly alkaline.
TYPE LOCATION: Carroll County, Missouri; 250 feet north and 60 feet east of the southwest corner of sec. 11, T. 51 N., R. 24 W. USGS Waverly quadrangle; lat. 39 degrees 14 minutes 22 seconds N. and long. 93 degrees 34 minutes 4 seconds W., UTM northing 4343505.91 and easting 450983.42, Zone 15; NAD 83.
RANGE IN CHARACTERISTICS:
Thickness of the orchric epipedon--10 to 20 centimeters
Depth to carbonates--0 to 25 centimeters
Depth to a buried soil (strongly contrasting particle size)--51 to 97 centimeters
Particle-size control section (sandy alluvium)--averages 0 to 10 percent clay and 75 to 95 percent sand
Particle-size control section (clayey alluvium)--averages 35 to 60 percent clay and 1 to 35 percent sand
Reaction--slightly alkaline or moderately alkaline throughout, but may be neutral in the Ap horizon
Ap horizons
Value--3 to 5
Chroma--1 to 4
Texture--loam, fine sandy loam, sandy loam, loamy fine sand, loamy sand, or fine sand
Average clay content--0 to 15 percent
Average sand content--40 to 90 percent
Reaction--neutral to moderately alkaline
C horizons
Hue--10YR to 5Y
Value--4 to 6
Chroma--2 or 3
Texture--loamy fine sand, fine sand, sand, or coarse sand
Average clay content--0 to 10 percent
Average sand content--75 to 95 percent
Reaction--slightly alkaline or moderately alkaline
2Ab horizons
Hue--10YR to 5Y
Value--2 or 3
Chroma--1 to 3
Texture--clay, silty clay, clay loam, or silty clay loam
Average clay content--35 to 60 percent
Average sand content--1 to 35
Reaction--slightly alkaline or moderately alkaline
2Bg horizons
Hue--10YR to 5Y
Value--3 to 5
Chroma--1 to 4
Texture--commonly clay, silty clay, clay loam, or silty clay loam individual layers of silt loam are allowed
Average clay content--30 to 50 percent
Average sand content--1 to 35
Reaction--slightly alkaline or moderately alkaline
2Cg horizons (where present)
Hue--10YR to 5Y
Value--4 or 5
Chroma--1 or 2
Texture--silt loam or very fine sandy loam
Average clay content--5 to 27 percent
Average sand content--20 to 65
Reaction--slightly alkaline or moderately alkaline
COMPETING SERIES: There are no competing series in the same family.
Soils that are similar are the
Modale,
Moville,
Sarpy and
Waubonsie series.
Modale and Moville soils are coarse-silty over clayey.
Sarpy soils are sandy and do not have contrasting textures.
Waubonsie soils are coarse-loamy over clayey.
GEOGRAPHIC SETTING:
Parent materials--sandy alluvium over clayey alluvium
Landscape--river valleys
Landforms--flood plains and flood-plain steps of major streams
Slope--0 to 3 percent
Elevation-122 to 274 meters above sea level
Mean annual temperature--8 to 14 degrees C.
Mean annual precipitation--660 to 1016 millimeters
Frost-free period--155 to 230 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Haynie,
Leta,
Modale,
Sarpy,
Waldron, and
Waubonsie soils.
Haynie soils have more silt and clay in the upper part of the particle-size control section and are at higher elevations and occupy positions further back from the stream.
Leta and Waldron soils have more than 35 percent clay in the upper part of the particle-size control section and are at lower elevations and occupy positions farther back from the stream.
Modale and Waubonsie soils more silt and clay in the upper part of the particle-size control section and are at similar elevations and occupy similar positions.
Sarpy soils are sandy throughout and occupy positions close to the stream.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage--Moderately well drained. In undisturbed areas, water saturation is at 61 to 96 centimeters during November to June in years with normal amounts of precipitation.
Saturated hydraulic conductivity (Ksat)--10 to 141 micrometers per second (high or very high) in the sandy alluvium and 0.42 to 1.4 micrometers per second (moderately low or moderately high) in the underlying clayey alluvium
Flooding--rare or occasional for brief to long periods
USE AND VEGETATION: Most areas are cleared and utilized the same way as adjoining soils. These soils are used to grow corn, wheat, and soybeans, or are used for hay and pasture. Native vegetation is mostly willow, cottonwood and oak trees.
DISTRIBUTION AND EXTENT:
Land Resource Region: M - Central Feed Grains and Livestock Region
Major Land Resource Areas:
--107B - Iowa and Missouri Deep Loess Hills
--115B - Central Mississippi Valley Wooded Slopes, Western Part
The Kenmoor soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Harrison County, Iowa, 1971.
REMARKS: Kenmoor soils do not seem to have a wetness problem during much of the growing season. In fact, droughtiness is a problem even though the finer-textured material underneath is wet for periods of time.
Diagnostic horizons and features recognized in this series are:
Ochric epipedon- the zone from the surface of the soil to a depth of 15 centimeters (Ap horizon)
Contrasting particle size--71 centimeters (2Ab horizon)
Taxonomic Subgroup changed from Aquic to Oxyaquic in March 2009.