LOCATION WEINGARTEN MOEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Fragic Hapludalfs
TYPICAL PEDON: Weingarten silt loam - on a 9 percent east-facing slope in pasture at an elevation of 745 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; dark brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; moderate fine and very fine granular structure; friable; many fine roots; slightly acid; abrupt smooth boundary. (3 to 9 inches thick)
BA--7 to 11 inches; yellowish brown (10YR 5/6) silt loam; moderate very fine subangular blocky structure; friable; common fine roots; moderately acid; clear smooth boundary. (0 to 7 inches thick)
Bt1--11 to 22 inches; yellowish brown (10YR 5/6) silty clay loam; moderate fine subangular blocky structure; friable; common fine roots; few faint clay films on faces of peds; thin clay depletions in lower 2 inches; strongly acid; abrupt smooth boundary.
Bt2--22 to 28 inches; yellowish brown (10YR 5/4) silty clay loam; moderate fine prismatic structure parting to moderate fine subangular blocky; firm; common fine roots; common distinct clay films on faces of peds; few thin clay depletions; very strongly acid; gradual smooth boundary.
Bt3--28 to 35 inches; dark yellowish brown (10YR 4/6) silt loam; weak fine subangular blocky structure; friable; few fine roots; few distinct clay films on faces of peds; very strongly acid; diffuse wavy boundary. (Combined thickness of the Bt horizon is 15 to 35 inches.)
Btx--35 to 51 inches; brown (10YR 5/3) silt loam; weak fine subangular blocky structure; firm, about 30 percent of the matrix is brittle; few faint clay films on faces of peds; many medium distinct yellowish brown (10YR 5/6) masses of iron accumulation; few fine dark iron and manganese concretions; moderately acid; abrupt smooth boundary. (3 to 22 inches thick)
2Btb--51 to 72 inches; reddish brown (5YR 4/4) gravelly clay; moderate very fine angular blocky structure; very firm; common distinct clay films on faces of peds; common medium distinct dark red (2.5YR 3/6) and brown (7.5YR 5/4) masses of iron accumulation; 15 percent chert gravel; neutral.
TYPE LOCATION: Ste. Genevieve County, Missouri; about 4 miles northeast of Weingarten; 2,600 feet north and 200 feet east of the southwest corner of section 5, T. 37 N., R. 8 E; USGS Weingarten quadrangle, latitude 37 degrees 56 minutes 25 seconds N. and longitude 90 degrees 10 minutes 55 seconds W.
RANGE IN CHARACTERISTICS: Thickness of the solum is 60 inches or more. Depth to the 2Btb horizon ranges from 40 to 60 inches. The mean annual soil temperature is 55 to 59 degrees F.
The Ap or A horizon has value of 3 to 5 and chroma of 2 to 4. Dry value is 6 or more. Reaction is neutral to moderately acid.
Some pedons have an E horizon with hue of 10YR or 7.5YR, value of 4 to 6 and chroma of 3 or 4.
The Bt horizon has hue of 10YR or 7.5YR, value of 4 or 5 and chroma of 3 to 6. It is silty clay loam or silt loam. Some pedons have up to 10 percent chert gravel in the lower part of the Bt horizon and the Btx horizon. Reaction is very strongly acid to moderately acid.
The Btx horizon has hue of 10YR or 7.5YR, value of 4 to 6, and chroma of 2 to 6. Reaction is strongly acid to slightly acid. Brittleness is evident in 30 to 60 percent of the mass.
The 2Btb horizon has hue of 10YR to 2.5YR; value of 4 or 5; and chroma of 4 to 8. It is clay, silty clay, and, less commonly, silty clay loam or their gravelly or very gravelly analogues. Reaction ranges from strongly acid to slightly alkaline. Some pedons have a thin stone line at the top of the 2Btb horizon.
COMPETING SERIES: There are not other series in this family. Series in similar families are the Baraboo, Blackhammer, Cadiz, Dodge, Dubuque, Hackers, Jackson, Knowles, La Farge, Lomira, Marseilles, Mentor, Palermo, Palsgrove, Pottersville, Russell, Sandview, Stubenville, Uniontown, Westbend, Westmore, Wrengart, and Yellowriver series. Baraboo, Dubuque, Knowles, La Farge, and Marseilles soils have a lithic or paralithic contact at depths of 20 to 40 inches. Blackhammer soils have a soil temperature of less than 54 degrees F., and have the lower part of the solum formed in stratified loamy pedisediment. Cadiz, Dodge, Lomira, Pottersville, Russell, and Stubenville soils have a calcareous horizon within 40 inches of the surface. Hackers, Mentor, Polermo, Uniontown, and Westmore soils lack a 2Btb horizon. Jackson and Yellowriver soils have a soil temperature of less than 54 degrees F. Palsgrove and Westbend soils have a lithic or paralithic at a depth of 40 to 60 inches. Wrengart soils are oxyaquic.
GEOGRAPHIC SETTING: Weingarten soils are on upland ridgetops, back slopes and foot slopes. Slope ranges from 2 to 45 percent. The soils formed in 40 to 60 inches of loess and other silty sediment over residuum weathered from cherty limestone or dolomite. The mean annual temperature ranges from 54 to 57 degrees F, and the mean annual precipitation ranges from 40 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Menfro, Minnith, Bucklick, Caneyville, Gasconade, Goss, and Hildebrecht, and Wrengart soils. Menfro soils are on ridgetops and foot slopes where the loess is thicker. Minnith soils are on similar positions. Bucklick, Caneyville, and Gasconade soils have bedrock at depths less than 60 inches and are on lower side slopes. Goss soils have cherty clayey subsoils and are on lower side slopes. Hildebrecht soils have a fragipan and are in similar positions. Wrengart soils are oxyaquic and are on similar postions.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is medium. Permeability is moderately slow.
USE AND VEGETATION: Most of the soils are cleared and used for pasture and hay. Some are cropped to corn and wheat, and the remainder is mixed hardwood forest. Native vegetation is mixed hardwood forest.
DISTRIBUTION AND EXTENT: Weingarten soils are mapped in the Ozark Border of eastern and central Missouri. The acreage is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Ste. Genevieve County, Missouri, 1982.
REMARKS: These soils were origionally classified as Typic Hapludalfs. The addition of the fragic subgroup to the Hapludalf order changed the classification. These soils have been included in the mapping of or considered a taxadjunct to the Menfro or Winfield series. They occupy landscapes between the deep loess (Menfro soils) near the Mississippi River and the thin loess (Hildebrecht and Union) soils with fragipans.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface to a depth of 7 inches (Ap horizon)
Argillic horizon - the zone from 11 to a depth of over 72 inches (Bt horizons)