Grassland Evaluation Contest Study GuideFifth Edition: October 2005
Practical Exercises

 
Winfield Series  
Soil Map Unit 60031
     
Depth class: Very deep Drainage class: Moderately Well  
Landform: Ridgetops and Sideslopes Parent material: Loess  
Slope range: 9 to 14 Percent Land Capability Classification: 3E  
     
Soil Depths
(Inches)
Available Water Capacity
(In/in range)
Permeability
(In/hr range)
0-6 0.20-0.24 0.60-2.00
6-10 0.18-0.22 0.60-2.00
10-40 0.18-0.20 0.60-2.00
40-60 0.20-0.22 0.60-2.00

Taxonomic class: Fine-silty, mixed, superactive, mesic Oxyaquic Hapludalfs

Typical Pedon: Winfield silt loam, 9 to 14 percent slopes.

Ap=0 to 6 inches; brown (10YR 4/3) silt loam; pale brown (10YR 6/3) dry; moderate fine granular structure; friable; common fine roots; few dark brown (10YR 3/3) stains; neutral; clear smooth boundary.

E=6 to 10 inches; brown (10YR 4/3) silt loam; weak medium subangular blocky structure; friable; common fine roots; slightly acid; clear smooth boundary.

BE=10 to 14 inches; dark yellowish brown (10YR 4/4) silt loam; moderate medium subangular blocky structure; friable; many fine roots; slightly acid; clear smooth boundary.

Bt1=14 to 22 inches; yellowish brown (10YR 5/4) silty clay loam; moderate fine subangular blocky structure; firm; common fine roots; many faint brown clay films on faces of peds; strongly acid; gradual smooth boundary.

Bt2=23 to 30 inches; yellowish brown (10YR 5/6) silt clay loam; strong medium subangular blocky structure; firm; few fine roots; many faint brown clay films on faces of peds; some peds coated with gray silt; common fine very dark brown iron and manganese concretions; very strongly acid; gradual smooth boundary.

Btg1=30 to 40 inches; variegated light brownish gray (10YR 6/2), dark brown (7.5YR 4/4) and yellowish brown (10YR 5/6) silt clay loam; moderate medium prismatic structure parting to weak medium subangular blocky; firm; few fine roots; many faint clay films on peds; very thick light brownish gray clay coatings on flows on some vertical prism faces; many very dark brown iron and manganese concretions; very strongly acid; gradual smooth boundary.

Btg2=40 to 54 inches; gray (10Y 6/1) silty clay loam; moderate medium prismatic structure parting to weak medium subangular blocky; firm; few fine roots; many distinct clay films on vertical faces of prisms; few faint clay films on other faces of peds; many fine distinct dark yellowish brown (10YR 4/4) masses of iron accumulation in ped interiors; many soft very dark brown iron and manganese accumulations; very strongly acid; diffuse wavy boundary.

Cg=54 to 60 inches; gray (10YR 6/1) silt loam; massive; friable; few fine roots; many fine prominent dark brown (7.5YR 4/4) masses of iron accumulation in ped interiors; common soft very dark brown iron and manganese accumulations; moderately acid.

Range in Characteristics: Sand content averages less than 10 percent throughout the series control section. Depth to the base of the argillic is 25 to 65 inches. The Ap horizon is silt loam or silty clay loam.

Drainage and Permeability: Moderately well drained. Runoff is medium to very rapid. Permeability is moderately. In undisturbed areas there is a perched water table that has an upper limit of 2.0 to 3.5 feet during November to April in most years.

Use and Vegetation: Most areas are cleared and used to grow soybeans, small grains, corn, hay, and pasture. Remaining areas are in hardwood forest. Native vegetation is deciduous hardwood (oak and hickory).


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