LOCATION TARRUS NCEstablished Series
TAXONOMIC CLASS: Fine, kaolinitic, thermic Typic Kanhapludults
TYPICAL PEDON: Tarrus silt loam-woodland. (Colors are for moist soil.)
A--O to 6 inches; reddish yellow (7.5YR 6/6) silt loam; weak fine granular structure; friable; common fine and medium roots; strongly acid; clear smooth boundary. (0 to 8 inches thick)
Bt1--6 to 20 inches; red (2.5YR 5/8) silty clay; moderate medium subangular blocky structure; firm, slightly sticky, slightly plastic; few fine roots; common distinct clay films on faces of peds; very strongly acid; gradual wavy boundary.
Bt2--20 to 44 inches; red (2.5YR 5/8) clay; common medium prominent brownish yellow (10YR 6/8) mottles; moderate medium subangular blocky structure; firm, slightly sticky, slightly plastic; common distinct clay films on faces of peds; very strongly acid; gradual wavy boundary. (Combined thickness of the Bt horizon is 25 to 56 inches.)
Cr--44 to 62 inches; weathered, moderately fractured argillite.
TYPE LOCATION: Randolph County, North Carolina; 0.9 mile east of intersection of Secondary Road 1181 and Secondary Road 1105, 500 feet north of intersection of Secondary 1105 and logging road; 30 feet west of logging road in woods. Eleazer USGS topographic quadrangle.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 30 to 60 inches. Depth to soft bedrock ranges from 40 to 60 inches. Depth to hard bedrock is more than 60 inches. The upper 20 inches of the Bt horizon ranges from 35 to 60 percent clay. The soil is very strongly acid or strongly acid throughout unless limed. Rock fragments of quartz or other fine-grained rock range from 0 to 40 percent in individual horizons throughout. Flakes of mica may be present throughout the soil.
The A or Ap horizon has hue of 5YR to 10YR, value of 3 through 6, and chroma of 2 through 8. It is silt loam, loam, very fine sandy loam, or fine sandy loam in the fine-earth fraction. Eroded areas include clay loam or silty clay loam in the fine earth fraction.
The E horizon, where present, has hue of 7.5YR or 10YR, value of 5 or 6, and chroma of 3 through 6. It is loam, silt loam or fine sandy loam in the fine-earth fraction.
The BE horizon, where present, has hue of 2.5YR through 10YR, value of 4 through 6, and chroma of 3 through 8. It is loam, silt loam, clay loam, or silty clay loam in the fine-earth fraction.
The Bt horizon has hue of 10R or 2.5YR, value of 4 or 5, and chroma of 6 to 8. Some pedons have mottles in shades of yellow, red, or brown. It is silty clay loam, silty clay, clay loam, or clay in the fine-earth fraction and contains more than 30 percent silt or more than 40 percent silt plus very fine sand.
The BC or CB horizons, where present, have hue of 10R through 5YR, value of 4 through 6, and chroma of 4 through 8. Some pedons have mottles in shades of yellow, red, or brown. Other colors occur as streaks or mottles in some pedons. Texture is clay loam, silty clay loam, silty clay, or clay in the fine-earth fraction.
The C horizon, where present, has hue of 10R through 5YR, value of 4 through 6, and chroma of 4 through 8. Some pedons have mottles in shades of yellow, red, or brown. It is silt loam, loam, clay loam, silty clay loam, silty clay, or clay saprolite in the fine-earth fraction.
The Cr horizon is weathered, slightly fractured to highly fractured argillite or other fine grained metavolcanic rock
COMPETING SERIES: These are the Brockroad, Catharpin, Georgeville, Herndon, and Nanford series in the same family. Brockroad and Catharpin soils have a lithologic discontinuity. Georgeville and Herndon soils do not have a paralithic contact within 60 inches. Nanford soils have Bt horizons that are 5YR or yellower.
GEOGRAPHIC SETTING: Tarrus soils are on gently sloping to very steep uplands. The slopes are generally convex; gradients are mostly between 4 and 15 percent, but the extreme range is from 0 to 50 percent. The soils formed in residuum weathered from argillite or other fine-grained metavolcanic rocks of the Carolina Slate Belt. The mean annual air temperature ranges from 59 to 65 degrees F., and mean annual precipitation ranges from about 40 to 50 inches. Length of growing season ranges from 175 to 240 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Georgeville, Herndon, and Nanford series, and the Alamance, Badin, Cid, Goldston, Gundy, Kirksey, Lignum, and Orange series. Alamance and Kirksey soils have less than 35 percent clay in the Bt horizon. Gundy soils have a base saturation greater than 35 percent. Lignum soils have iron depletions in the upper 10 inches of the Bt horizon. Goldston soils have paralithic contact at less than 20 inches.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow to very rapid, and permeability is moderate.
USE AND VEGETATION: Mostly in woodland of mixed hardwoods and pine. Some acreage is in cultivated crops and pasture. Crops are mostly corn, small grain, hay, and soybeans.
DISTRIBUTION AND EXTENT: In the thermic Piedmont Plateau in North Carolina, and possibly South Carolina, Alabama, Georgia, and Virginia. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Randolph County, North Carolina, 1999.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
a. Ochric epipedon - the zone from 0 to 6 inches (A horizon).
b. Argillic horizon - the zone from 6 to 44 inches (Bt horizons).
c. Paralithic contact at 44 inches.
ADDITIONAL DATA: None
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NC0000 TARRUS 0- 50 59- 65 175-240 40- 50 250- 900 NC0000 TARRUS 0- 50 58- 65 180-200 38- 46 250- 900 NC0000 TARRUS 0- 50 58- 65 180-200 38- 46 250- 900SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness NC0000 NONE 6.0-6.0 - 40-60 SOFT NC0000 NONE 6.0-6.0 - 40-60 SOFT NC0000 NONE 6.0-6.0 - 40-60 SOFT
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- NC0000 0- 6 SIL L VFSL 0- 5 80-100 12-27 - NC0000 0- 6 FSL 0- 5 80-100 5-20 - NC0000 0- 6 SICL CL 0- 5 75- 90 27-40 - NC0000 6-44 SICL SIC C 0- 5 75- 95 45-60 - NC0000 44-62 WB - - - - NC0000 0- 6 GR-SIL GR-L GR-VFSL 0- 10 55- 75 12-27 - NC0000 0- 6 GR-FSL 0- 10 55- 75 5-20 - NC0000 0- 6 GR-SICL GR-CL 0- 10 55- 75 40-50 - NC0000 6-44 SICL SIC GR-C 0- 10 55- 95 45-60 - NC0000 44-62 WB - - - - NC0000 0- 6 GR-C 0- 10 55- 75 40-50 - NC0000 6-44 SICL SIC GR-C 0- 10 55- 95 45-60 - NC0000 44-62 WB - - - -
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll NC0000 0- 6 4.5- 5.5 .5-2. 0- 0 0.6- 2.0 LOW NC0000 0- 6 4.5- 5.5 .5-2. 0- 0 0.6- 2.0 LOW NC0000 0- 6 4.5- 5.5 0.-2. 0- 0 0.6- 2.0 LOW NC0000 6-44 4.5- 5.5 0.-.5 0- 0 0.6- 2.0 LOW NC0000 44-62 - - - 0.00-0.06 NC0000 0- 6 4.5- 5.5 .5-2. 0- 0 0.6- 2.0 LOW NC0000 0- 6 4.5- 5.5 .5-2. 0- 0 0.6- 2.0 LOW NC0000 0- 6 4.5- 5.5 .5-2. - 0.6- 2.0 LOW NC0000 6-44 4.5- 5.5 0.-.5 0- 0 0.6- 2.0 LOW NC0000 44-62 - - - 0.00-0.06 NC0000 0- 6 4.5- 5.5 .5-2. 0- 0 0.6- 2.0 LOW NC0000 6-44 4.5- 5.5 0.-.5 0- 0 0.6- 2.0 LOW NC0000 44-62 - - - 0.00-0.06