LOCATION TRELOAR MOEstablished Series
TAXONOMIC CLASS: Sandy over loamy, mixed, superactive, calcareous, mesic Oxyaquic Udifluvents
TYPICAL PEDON: Treloar fine sandy loam on a one percent slope in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 18 centimeters (0 to 7 inches); very dark grayish brown (10YR 3/2), fine sandy loam, grayish brown (10YR 5/2) dry; weak fine subangular blocky structure; friable; many very fine and fine roots; common very fine and fine tubular pores; very slightly effervescent; moderately alkaline; clear smooth boundary. (Combined thickness of the A horizon is 0 to 23 centimeters, 0 to 9 inches.)
C1--18 to 36 centimeters (7 to 14 inches); dark grayish brown (10YR 4/2) fine sand; single grain; loose; few very fine roots; few very fine sandy loam mixings from deep plowing; slightly effervescent; moderately alkaline; clear smooth boundary.
C2--36 to 48 centimeters (14 to 19 inches); dark grayish brown (10YR 4/2) fine sand; single grain; loose; few very fine roots; few very fine sandy loam mixings from deep plowing; slightly effervescent; slightly alkaline; clear smooth boundary.
C3--48 to 71 centimeters (19 to 28 inches); 40 percent dark grayish brown (10YR 4/2), 30 percent brown (10YR 4/3), and 30 percent grayish brown (10YR 5/2) fine sand; single grain; loose; slightly effervescent; moderately alkaline; clear smooth boundary. (Combined thickness of the C horizon is 36 to 76 centimeters, 14 to 30 inches.)
2Bw1--71 to 102 centimeters (28 to 40 inches); 50 percent brown (10YR 4/3), 30 percent grayish brown (10YR 5/2), and 20 percent dark grayish brown (10YR 4/2) loam; weak fine and medium subangular blocky structure; friable; few fine tubular pores; common fine prominent yellowish brown (10YR 5/6) masses of oxidized iron (fe+3) in matrix; common fine distinct dark gray (10YR 4/1) iron depletions in matrix; many very dark grayish brown (10YR 3/2) silt loam mixings from deep plowing; strongly effervescent; moderately alkaline; clear smooth boundary.
2Bw2--102 to 114 centimeters (40 to 45 inches); dark grayish brown (10YR 4/2) fine sandy loam; weak fine and medium subangular blocky structure; very friable; few fine tubular pores; common fine prominent yellowish brown (10YR 5/6) masses of oxidized iron (fe+3) in matrix; few fine faint dark gray (10YR 4/1) iron depletions in matrix; common sandy mixings from deep plowing; strongly effervescent; slightly alkaline; clear smooth boundary. (Combined thickness of the 2Bw horizon is 0 to 168 centimeters, 0 to 66 inches.)
2C1--114 to 130 centimeters (45 to 51 inches); dark grayish brown (2.5Y 4/2) stratified silt loam; massive; very friable; common fine prominent yellowish brown (10YR 5/6) masses of oxidized iron (fe+3) in matrix; few fine faint gray (10YR 5/1) iron depletions in matrix; strongly effervescent; moderately alkaline; clear smooth boundary.
2C2--130 to 150 centimeters (51 to 59 inches); grayish brown (2.5Y 5/2) stratified fine sand and fine sandy loam; massive; very friable; common fine prominent yellowish brown (10YR 5/6) masses of oxidized iron (fe+3) in matrix; slightly effervescent; moderately alkaline; clear smooth boundary.
2C3--150 to 183 centimeters (59 to 72 inches); 70 percent grayish brown (2.5Y 5/2) and 30 percent dark grayish brown (2.5Y 4/2) stratified very fine sandy loam and silt loam; massive; very friable; many fine prominent yellowish brown (10YR 5/6) masses of oxidized iron (fe+3) in matrix; common fine faint gray (10YR 6/1) iron depletions in matrix; strongly effervescent; moderately alkaline; clear smooth boundary.
2C4--183 to 221 centimeters (72 to 87 inches); 60 percent grayish brown (2.5Y 5/2), 20 percent dark grayish brown (2.5Y 4/2) , and 20 percent light brownish gray (2.5Y 6/2) stratified silt loam; massive; very friable; common fine prominent yellowish brown (10YR 5/6) masses of oxidized iron (fe+3) in matrix; many fine faint gray (10YR 5/1) iron depletions in matrix; few dark gray (10YR 4/1) silty strata 1 inch thick; violently effervescent; moderately alkaline. (Combined thickness of the 2C horizon is 0 to 112 centimeters, 0 to 44 inches.)
TYPE LOCATION: Warren County, Missouri; 1,893 feet West and 3,695 feet North from the Southeast corner of Section 29, Township 45N, Range 2W of the 5th Principal Meridian. Topo quad: 38091-F2 Treloar, Missouri; latitude 38 degrees, 37 minutes 32.5 seconds N. and longitude 91 degrees, 10 minutes, 7.6 seconds W. UTM 659,406 meters easting, 4,276,832 meters northing, Zone 15, NAD 83.
RANGE IN CHARACTERISTICS:
Thickness of orchric epipedon: 0 to 23 centimeters (0-9 inches)
Depth to top of the cambic horizon (where present): 41 to 97 centimeters (16 to 38 inches inches)
Depth to the base of the cambic horizon (where present): 91 to greater than 203 centimeters (36 to 80 inches)
Particle-size control section (upper part): averages 2 to 10 percent clay and 75 to 95 percent sand
Particle-size control section (lower part): averages 8 to 35 percent clay and 10 to 50 percent sand
Depth to a buried soil (strongly contrasting particle size): 36 to 99 centimeters (14 to 39 inches)
Depth to carbonates: 0 to 25 centimeters (0 to 10 inches)
A or Ap horizons
Hue: 10YR or 2.5Y
Value: 3 to 6
Chroma: 2 to 4
Texture: fine sandy loam, loamy fine sand, sandy loam, fine sand, sand, or coarse sand
Average clay content: 2 to 10 percent
Average sand content: 60 to 95 percent
Reaction: neutral to moderately alkaline
C horizon
Hue: 10YR or 2.5Y
Value: 3 to 6
Chroma: 2 to 4
Texture: loamy fine sand, fine sand, sand, or coarse sand
Average clay content: 2 to 10 percent
Average sand content: 75 to 95 percent
Reaction: slightly to strongly alkaline Redox depletions and concentrations can be present in the lower part of this horizon.
2Ab horizon (if present)
Hue: 10YR or 2.5Y
Value: 2 or 3
Chroma: 1 to 3
Texture: silt loam or very fine sandy loam
Average clay content: 10 to 25 percent
Average sand content: 10 to 70 percent
Reaction: slightly or moderately alkaline Redox depletions and concentrations are present in this horizon.
2Bw horizon (if present)
Hue: 10YR or 2.5Y
Value: 3 to 5
Chroma: 1 to 3
Texture: commonly silt loam, very fine sandy loam, loam, fine sandy loam or silty clay loam Individual horizons are extremely variable and can have other textures. Average clay content: 10 to 35 percent
Average sand content: 10 to 70 percent
Reaction: slightly or moderately alkaline Redox depletions and concentrations are present in this horizon.
2C horizon (if present)
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 2 or 3
Texture: commonly silt loam, very fine sandy loam, or fine sandy loam less commonly loamy fine sand or fine sand
Individual horizons are extremely variable and can have other textures. Average clay content: 10 to 25 percent
Average sand content: 10 to 90 percent
Reaction: slightly or moderately alkaline
Redox depletions and concentrations are present in this horizon.
COMPETING SERIES: There are no competing series. Kenmoor and Sandover are similar soils. Kenmoor soils are sandy over clayey. Sandover soils lack cambic horizons and also lack carbonates throughout the control section for the calcareous class.
GEOGRAPHIC SETTING: Treloar soils formed in Missouri River alluvium on flood plains and flood plain steps. They occur on nearly level, linear to convex areas and have slopes of 0 to 2 percent. The mean annual temperature ranges from 10 to 13 degrees C (50 to 55 degrees F), and mean annual precipitation ranges from 889 to 1020 millimeters (35 to 40 inches).
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blake, Haynie, Kenmoor, Lowmo, Peers, and Sarpy soils. Blake, Haynie, Lowmo, and Peers soils contain less sand in the upper part of the control section, lack contrasting textures, and occur on similar landforms. Kenmoor soils have more clay in the lower part of the control section and are on similar landforms. Sarpy soils are better drained, lack contrasting textures and occur on similar but slightly higher landforms.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. The potential for runoff is negligible to low. Permeability is rapid in the upper part and moderate in the lower part. Saturated hydraulic conductivity (Ksat) is 42 to 141 micrometers per second in the upper sandy part and 4-14 micrometers per second in the lower loamy part. In undisturbed areas an apparent water table has an upper limit of 51 to 100 centimeters (20 to 39 inches) during November to May in most years. These soils are subject to frequent and occasional flooding.
USE AND VEGETATION: Most areas are used for cultivated crops or alfalfa. Some areas have been abandoned. The native vegetation is trees.
DISTRIBUTION AND EXTENT: The Central Mississippi Valley Wooded Slopes, MLRA 115B, of east central Missouri. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Warren County, Missouri, 2009.
REMARKS: These soils were formed primarily by levee failures and the resultant sand deposition from blow holes. Reclamation resulted in extremely variable soil horizons which change in very short distances. The name is from a small village in Warren County.
Diagnostic horizons and features recognized in this pedon are: orchic epipedon - the zone from the surface of the soil to a depth of 18 centimeters (7 inches) (Ap horizon); depth to strongly contrasting particle size 71 centimeters (28 inches) (top of 2Bw1 horizon); cambic horizon - the zone from approximately 71 to 114 centimeters (28 inches to 45 inches) (2Bw horizons).
ADDITIONAL DATA: Laboratory data; University of Missouri, Columbia, Missouri; Pedon ID M0721903 is data for the OSD typical pedon; Pedon IDs M0707115, M0713907, M0721916, M0713909, M0718317, M0707108, M0702740, M0718905, M0718906, M9601901 and M0702725, are additional data used for the series range in characteristics.