LOCATION CHICKAHOMINY VA+NCEstablished Series
TAXONOMIC CLASS: Fine, mixed, semiactive, thermic Typic Endoaquults
TYPICAL PEDON: Chickahominy silt loam - on a 1 percent slope in woodland. (Colors are for moist soil unless otherwise stated.)
A--0 to 2 inches; dark grayish brown (2.5Y 4/2) silt loam; moderate medium and fine granular structure; friable, sticky, plastic; many fine medium and coarse roots; few very fine tubular pores; extremely acid; abrupt smooth boundary. (1 to 4 inches thick)
Eg--2 to 7 inches; dark grayish brown (2.5Y 4/2) silt loam; common fine faint light olive brown (2.5Y 5/4) mottles and common fine distinct very dark grayish brown (1OYR 3/2) mottles; moderate medium granular and weak fine subangular blocky structure; friable, sticky, plastic; many fine medium and coarse roots; common very fine tubular pores; few fine flakes of mica; extremely acid; clear smooth boundary. (0 to 10 inches thick)
Btg1--7 to 13 inches; gray (N 6/0) silty clay loam; common medium prominent yellowish brown (1OYR 5/8) mottles; strong medium and fine subangular blocky structure; very firm, sticky, plastic; common fine medium and coarse roots; few very fine tubular pores; few faint clay films on faces of peds; few fine flakes of mica; extremely acid; gradual smooth boundary.
Btg2--13 to 33 inches; gray (N 6/0) silty clay; common fine and medium prominent yellowish brown (1OYR 5/8) mottles; weak medium prismatic structure parting to strong fine and medium angular blacky; very firm, sticky, plastic; common fine and medium roots along primary structural faces; few very fine tubular pores; common distinct clay films on faces of peds; few fine flakes of mica; very strongly acid; gradual smooth boundary.
Btg3--33 to 47 inches; gray (5Y 6/1) silty clay; common medium Prominent yellowish brown (1OYR 5/8) mottles; moderate coarse prismatic structure parting to strong medium and fine angular blocky; very firm, sticky, plastic; common fine and few medium roots along primary structural faces; common prominent clay films on faces of peds; few fine roots of mica; extremely acid; gradual smooth boundary.
Btg4--47 to 61 inches; gray (5Y 5/1) silty clay; common medium prominent yellowish brown (1OYR 5/8) mottles; strong medium and fine subangular and angular blocky structure; firm, sticky, plastic; few fine and medium roots; few prominent clay films on faces of peds; few fine flakes of mica; very strongly acid; gradual smooth boundary.
Btg5--61 to 85 inches; gray (5Y 6/1) clay loam; common medium prominent yellowish brown (1OYR 5/8) mottles; strong medium and fine subangular and angular blocky structure; firm, sticky, plastic; few fine roots; few very fine tubular pores; few prominent clay films on faces of peds; few fine flakes of mica; very strongly acid. (Combined thickness of toe Bt horizon is 50 to more than 80 inches)
TYPE LOCATION: James City County, Virginia; approximately 300 feet west of intersection of VA-5 and VA-613, 100 feet south of VA-5.
RANGE IN CHARACTERISTICS:: The solum thickness ranges from 60 to 80 inches or more. Quartz gravel make up 0 to 2 percent of the solum. The particle-size control section has more than 30 percent silt. Aluminum saturation on the exchange complex is commonly more than 50 percent and ranges from 10 to 25 meq/100 grams of soil. Fine flakes of mica range from few to common in most pedons. The soil is extremely acid through strongly acid unless limed.
The A horizon has hue of 10YR through 5Y, value of 3 through 6, and chroma of 1 or 2. Where value is 3 it is less than 6 inches thick. It is very fine sandy loam, loam, or silt loam.
The Eg horizon has hue of 10YR through 5Y, value of 3 through 6, and chroma of 1 or 2. Some pedons have high and low chroma mottles. The E horizon is very fine sandy loam, loam, or silt loam.
The BAg horizon, where present, has hue of 10YR through 5Y or it is neutral, value of 4 through 6, and chroma 0 through 2. High chroma mottles are in some pedons. It is loam, silt loam, clay loam, or silty clay loam.
The EBg or BEg horizon, where present, has hue of 1OYR through 5Y or they are neutral, value of 4 through 6, and chroma of 0 through 2. High chroma mottles are in some pedons. Texture is loam, silt loam, clay loam, or silty clay loam.
The Btg horizon has hue of 1OYR through 5Y or it is neutral, value of 4 through 7, and chroma of 0 through 2. High chroma mottles are in most pedons. It is clay loam, silty clay loam, silty clay, or clay.
The Cg horizon where present, has hue of 10YR through 5Y, or it is mottled. It commonly is stratified and ranges from sand through clay. rock fragments range from 0 to 15 percent.
COMPETING SERIES: (This section not checked this date; particle-size and activity class changed) These are the Pooler, Roanoke, and Worsham in the same family. Similar sOils in related families include Bethera, Bladen, Cantey, Coxville, Grady, Leaf, and Rembert. Bladen, Pooler, and Worsham soils have less than 30 percent silt in the particle-size control section. Bethera soils have less than 10 percent weatherable minerals in the sand and silt fraction of the particle-size control section. Cantey, Coxville, Grady, and Rembert soils have kaolinitic mineralogy. Leaf soils have an abrupt textural change between the A and B horizons. Roanoke soils have a solum thickness of less than 150 cm.
GEOGRAPHIC SETTINGS: Chickahominy soils are on nearly level areas of Coastal Plain stream terraces. The soils formed in clayey fluvial sediments of low energy deposition. Slopes range from 0 to 2 percent. Mean annual temperature ranges from 59 to 62 degrees F. and mean annual precipitation ranges from 42 to 48 inches. Elevation at the type location is 30 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Altavista, Augusta, Dogue, Newflat, Peawick, State, and Tetotum soils. All of these soils are on higher landscape positions and are better drained. In addition, all of these soils have a fine-loamy particle-size control section except Dogue, Newflat, and Peawick.
DRAINAGE AND PERMEABILITY: Poorly drained; slow runoff; very slow permeability. A water table is at a depth of 0 to 0.5 feet below the surface from November through April.
USE AND VEGETATION: Chickahominy soils are mostly in woodland. Dominant tree species include red maple, sweetgum, water oak, willow oak, and scattered loblolly pine. Farmed areas are used for corn, soybean, or hay and pasture.
DISTRIBUTION AND EXTENT:: Coastal Plain in Virginia and possibly North Carolina, Alabama, and Georgia. The series is of moderate extent.
ESTABLISHED SERIES: Prince George County, Virginia; 1980.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
REMARKS: Chickahominy soils have previously been included with Roanoke, Bladen, and Coxville soils.
Diagnostic horizons and features recognized in this pedon are: Ochric Epipedon - The zone between the surface and 7 inches (A and E horizon). Argillic horizon - the zone between 7 and 85 inches (Btg horizons) Typic Aquults - All horizons dominated with chroma of 2 or less.
ADDITIONAL DATA: Particle-size and chemical data from VPI & SU is available for the typical pedon. Particle-size, chemical, and engineering data from VPI & SU is available for pedon 79VA-149-16 in Prince George County, Virginia.
SIR=VA0172, VA0321 (PONDED)
MLRA=133A, 153A
REVISED=9/6/95, MHC
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip ElevationSOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC-
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll