LOCATION ZANONI MOEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, active, mesic Ultic Hapludalfs
TYPICAL PEDON: Zanoni fine sandy loam, 1 to 3 percent slopes, occasionally flooded, in a fescue pasture at an elevation of 860 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 4 inches; dark brown (10YR 3/3) fine sandy loam, pale brown (10YR 6/3) dry; moderate fine granular structure; very friable; many very fine and fine roots throughout; many very fine irregular pores; 10 percent angular chert gravel; strongly acid (pH 5.5); clear smooth boundary. (4 to 11 inches thick)
AB--4 to 9 inches; brown (10YR 4/3) fine sandy loam; weak subangular structure; friable; common fine and medium roots throughout; many very fine irregular and tubular pores; 5 percent angular chert gravel; slightly acid (pH 6.1); clear smooth boundary. (0 to 12 inches thick)
Bt1--9 to 18 inches; strong brown (7.5YR 4/6) and brown (7.5YR 4/4) fine sandy loam; weak fine subangular blocky structure; friable; few fine and medium roots throughout; common very fine tubular pores; few distinct discontinuous yellowish red (5YR 5/6) clay films on faces of peds and few prominent discontinuous very dark grayish brown (10YR 3/2) organic coats on faces of peds; 10 percent rounded chert gravel; moderately acid (pH 5.7); gradual smooth boundary.
Bt2--18 to 26 inches; brown (7.5YR 4/4) gravelly fine sandy loam; moderate coarse subangular blocky structure; friable; few very fine roots throughout; many fine tubular pores; few distinct discontinuous yellowish red (5YR 5/6) clay films on faces of peds and few prominent discontinuous very dark grayish brown (10YR 3/2) organic coats on faces of peds; 15 percent rounded chert gravel; strongly acid (pH 5.2); clear smooth boundary.
Bt3--26 to 34 inches; strong brown (7.5YR 4/6) gravelly fine sandy loam; weak very fine subangular blocky structure; friable; few very fine roots throughout; many fine tubular pores; few distinct discontinuous yellowish red (5YR 5/6) clay films on faces of peds; 15 percent rounded chert gravel; very strongly acid (pH 4.8); clear smooth boundary.
Bt4--34 to 44 inches; brown (7.5YR 4/4) gravelly fine sandy loam; weak fine subangular blocky structure; friable; few very fine roots throughout; many fine tubular pores; few distinct discontinuous yellowish red (5YR 5/6) clay films on rock fragments; 30 percent rounded and subrounded chert gravel; very strongly acid (pH 4.8); abrupt smooth boundary. (combined thickness of the Bt horizons is 30 or more inches)
2C1--44 to 58 inches; brown (7.5YR 5/4) extremely gravelly coarse sand; massive; friable; many fine irregular pores; 70 percent rounded and subrounded chert gravel; very strongly acid (pH 4.9); gradual smooth boundary.
2C2--58 to 80 inches; strong brown (7.5YR 5/6) extremely gravelly loamy coarse sand; massive; friable; many fine irregular pores; 80 percent rounded and subrounded chert gravel; very strongly acid (pH 4.9). (combined thickness of the 2C horizons is 0 to 40 inches)
TYPE LOCATION: Douglas County, Missouri; near Topaz; 2,000 feet north and 400 feet west of the SE corner of section 12, T. 26 N., R. 12 W; Nichols Knob, Missouri USGS quadrangle; UTM coordinates, Easting: 571125m, Northing: 4089120m.
RANGE IN CHARACTERISTICS:
Depth to bedrock: more than 80 inches
Solum thickness: 34 to more than 60 inches
A horizon
Rock fragments: 0 to 15 percent gravel
Hue: 7.5YR or 10YR
Value: 3 or 4
Chroma: 2 to 4
Texture: loam, fine sandy loam, sandy loam, silt loam, coarse sandy loam
Reaction: very strongly acid to slightly alkaline
AB horizon
Rock fragments: 0 to 15 percent gravel
Hue: 10YR or 7.5YR
Value: 4 or 5
Chroma: 3 to 6
Texture: sandy loam, fine sandy loam, loam, coarse sandy loam
Reaction: strongly acid to neutral
Bt and 2Bt horizons
Rock fragments: 0 to 35 percent gravel
Hue: 10YR to 2.5YR
Value: 4 to 6
Chroma: 4 or 6
Texture: sandy loam, fine sandy loam, loam, coarse sandy loam, sandy clay loam
Reaction: very strongly acid to neutral
2BC and 2C horizons
Rock fragments: 0 to 80 percent gravel or cobbles
Hue: 10YR or 7.5YR
Value: 4 or 5
Chroma: 4 or 6
Texture: loamy sand, sandy loam, sand, coarse sand, coarse sandy loam, loamy coarse sand
Reaction: very strongly acid to neutral
COMPETING SERIES: These are the Elevasil series. Elevasil soils have a paralithic contact from 20 to 40 inches.
GEOGRAPHIC SETTING: Zanoni soils are on low stream terraces. They formed in loamy alluvium. Slopes range from 0 to 5 percent. Elevations are commonly 550 to 1,000 feet. Mean annual temperature ranges from 54 to 58 degrees F., and the mean annual precipitation ranges from 40 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kaintuck, Lecoma, Possumtrot, Razort, Relfe and Sandbur series. Kaintuck are stratified immediately below the surface layer. Lecoma soils are fine-loamy and are on foot slopes. Possumtrot soils do not have an argillic horizon. Razort soils are fine-loamy. Relfe soils are sandy-skeletal. Sandbur soils have dark colored surface horizons. Kaintuck, Relfe, and Sandbur soils are on flood plains. Possumtrot and Razort soils are on stream terraces.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is very low. Permeability is moderately rapid. The saturated hydraulic conductivity is high. These soils are subject to rare to occasional flooding.
USE AND VEGETATION: This soil is used mainly for pasture and hayland. Native vegetation is mixed hardwoods.
DISTRIBUTION AND EXTENT: The Ozarks Highland region (MLRA 116A) of southcentral Missouri and possibly northern Arkansas. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Douglas County, Missouri soil survey, 2004.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
1) Ochric epipedon - the zone from the surface to a depth of 9 inches. (Ap and AB horizons)
2) Argillic horizon - the zone from 9 to 44 inches (Bt horizons).
This soil is being mapped predominantly in the Roubidoux formation (Ordivician age) in Missouri.
ADDITIONAL DATA: Sampled for the University of Missouri Soil Characterization Lab as M9406725.