LOCATION PUTCO MOEstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, calcareous, mesic Typic Udorthents
TYPICAL PEDON: Putco silty clay loam - on a 16 percent slope in mixed hardwood trees, grasses and legumes. (Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry; weak fine granular structure; friable; common fine roots; 30 percent soft shale fragments; strong effervescence; moderately alkaline; clear wavy boundary. (0 to 6 inches thick).
C--4 to 60 inches; mixed grayish brown (2.5Y 5/2), very dark gray (N 3/0), and dark reddish brown (2.5YR 3/4) silty clay; massive; firm; few fine roots; 50 percent soft shale fragments; strong effervescence; moderately alkaline.
TYPE LOCATION: Putnam County, Missouri; 3.5 miles northwest of Omaha; 600 feet south and 1200 feet east of the northwest corner of sec. 32, T. 67 N., R. 17 W.
RANGE IN CHARACTERISTICS: Depth to bedrock is 60 to 80 inches or more. Content of soft shale fragments in the A or Ap horizon ranges from 15 to 45 percent and in the C horizon from 25 to 60 percent. Content of hard fragments of shale or limestone range from 0 to 15 percent throughout. Reaction in the A horizon ranges from neutral to moderately alkaline and the C horizon is slightly alkaline or moderately alkaline.
The A or Ap horizon has hue of 10YR or 2.5Y, value of 2 to 5 and chroma of 1 to 6 or is neutral. It is silty clay loam or silty clay.
The C horizon has hue of 10R to 2.5Y, value of 3 to 6 and chroma of 1 to 6 or is neutral. It is silty clay or clay.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Putco soils are on man-made ridgetops and sideslopes of uplands and structural benches. Slopes range from 0 to 70 percent. The mean annual temperature ranges from 50 to 54 degrees and mean annual precipitation ranges from 30 to 35 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gorin, Keswick, Vanmeter and Winnegan series. Gorin, Keswick and Winnegan soils do not have soft fragments of shale in the profile. Gorin soils are upslope on narrow ridgetops and formed in loess and pedisediment. Keswick soils are upslope on narrow ridgetops, interfluves, and sideslopes and formed mostly in glacial till. Winnegan soils are on higher slopes and formed in glacial till. Vanmeter soils are commonly upslope, formed in residuum from calcareous shale and have a Cr horizon at a depth of 20 to 40 inches.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow to very rapid. Permeability is slow.
USE AND VEGETATION: Most areas are idle and support hardwoods, grasses and legumes.
DISTRIBUTION AND EXTENT: Northern Missouri and possibly southern Iowa. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Putnam County, Missouri, 1989.
REMARKS: Diagnostic horizons and features recognized in this series are: ochric epipedon-the zone from the surface of the soil to a depth of 4 inches (A horizon). These soils were formerly mapped as mine spoils. Soil colors with value of 2 or 3 result from finely divided coal or black shale and do not result from genetic soil development.