LOCATION LACKSTOWN VA NCEstablished Series
TAXONOMIC CLASS: Fine, mixed, semiactive, mesic Aquic Hapludults
TYPICAL PEDON: Lackstown fine sandy loam (in an area of Lackstown fine sandy loam, 2 to 8 percent slopes), forested. (Colors are for moist soil, unless otherwise indicated.)
A--0 to 9 inches; yellowish brown (10YR 5/4) fine sandy loam, light yellowish brown (10YR 6/4), dry; weak fine granular structure; very friable, nonsticky, nonplastic; common fine and very fine roots; slightly acid; abrupt smooth boundary.
E--9 to 14 inches; yellowish brown (10YR 5/4) sandy loam; weak fine subangular blocky structure; friable, slightly sticky, nonplastic; few fine roots; strongly acid; clear smooth boundary.
Bt1--14 to 28 inches; yellowish brown (10YR 5/8) clay loam; moderate medium subangular blocky structure; firm, slightly sticky, slightly plastic; many fine vesicular pores; 15 percent distinct clay films on all faces of peds; 1 percent fine faint yellowish red (5YR 5/6) masses of oxidized iron; very strongly acid; clear smooth boundary.
Bt2--28 to 40 inches; yellowish brown (10YR 5/8) clay; strong coarse prismatic structure; very firm, moderately sticky, very plastic; common fine vesicular pores; 15 percent distinct clay films on all faces of peds; 10 percent medium prominent light brownish gray (2.5Y 6/2) iron depletions; very strongly acid; clear smooth boundary.
Btg1--40 to 46 inches; light brownish gray (2.5Y 6/2) clay; strong coarse prismatic structure parting to moderate medium angular blocky structure; very firm, moderately sticky, very plastic; 15 percent distinct clay films on all faces of peds; 10 percent medium prominent yellowish brown (10YR 5/8) masses of oxidized iron; very strongly acid; clear smooth boundary.
Btg2--46 to 54 inches; light brownish gray (2.5Y 6/2) clay; weak coarse angular blocky structure; firm, moderately sticky, moderately plastic; 15 percent distinct clay films on all faces of peds; very strongly acid; clear smooth boundary.
C--54 to 65 inches; 50 percent dark reddish brown (2.5YR 3/3) and 25 percent pale brown (10YR 6/3) and 25 percent yellowish brown (10YR 5/8) loam; massive; friable, slightly sticky, nonplastic; very strongly acid.
TYPE LOCATION: Halifax County, Virginia; about 700 feet north of the intersection of Secondary Roads 613 and 914, 200 feet northwest of Secondary Road 914, about 4,200 feet west of Scottsburg; USGS Unknown, VA topographic quadrangle; lat. 36 degrees 45 minutes 22 seconds N. and long. 78 degrees 48 minutes 20 seconds W.
RANGE IN CHARACTERISTICS:
Depth to top of Argillic horizon: 4 to 20 inches
Depth to base of Argillic horizon: 30 to 60 inches
Depth to Bedrock: Greater than 60 inches
Depth to top of Seasonal High Water Table: 12 to 30 inches, January to March
Depth to base of Seasonal High Water Table: 45 to 60 inches, January to March
Rock Fragment Content: 0 to 5 percent, by volume throughout
Soil Reaction: Strongly acid to extremely acid throughout, unless limed
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon:
Color--hue of 7.5YR to 2.5Y, value of 3 to 6, chroma of 1 to 6
Texture--fine sandy loam, loamy sand, coarse sandy loam, sandy loam, loam, silt loam, sandy clay loam, or clay loam
E horizon:
Color--hue of 7.5YR to 2.5Y, value of 5 to 7, chroma of 2 to 4
Texture--fine sandy loam, loamy sand, coarse sandy loam, sandy loam, loam, or silt loam
BE horizon (if it occurs):
Color--10YR or 2.5Y, value of 5 to 7, chroma of 4 to 6
Texture--sandy loam, sandy clay loam, loam, silt loam or silty clay loam
Bt horizon:
Color--hue of 7.5YR to 2.5Y, value of 5 to 7, chroma of 3 to 8
Texture--sandy clay loam, silty clay loam, clay loam, sandy clay, clay, or silty clay.
Redoximorphic features (if they occur)--iron depletions in shades of brown or gray and masses of oxidized iron in shades of red, yellow, or brown
Btg horizon:
Color--hue of 7.5YR to 2.5Y, value of 5 to 7, chroma of 1 or 2
Texture--sandy clay loam, silty clay loam, clay loam, sandy clay, clay, or silty clay. The Bt horizon is distinctly finer in texture and firmer in consistence than the Bt horizon.
Redoximorphic features--iron depletions in shades of brown or gray and masses of oxidized iron in shades of red, yellow, or brown
BCg horizon (if it occurs):
Color--hue of 2.5YR to 2.5Y, value of 4 to 8, chroma of 1 or 2, or is neutral with value of 4 to 8
Texture--silty clay loam, sandy clay loam, sandy clay, clay loam or silty clay
Redoximorphic features--iron depletions in shades of brown or gray and masses of oxidized iron in shades of red, yellow, or brown
Cg horizon (if it occurs:
Color--hue of 10R to 2.5Y, value of 3 to 8, chroma of 1 or 2, or is neutral with value of 3 to 8
Texture--silt loam, loam, sandy loam, fine sandy loam, sandy clay loam, clay loam, silty clay loam, silty clay, or sandy clay
Redoximorphic features--iron depletions in shades of brown or gray and masses of oxidized iron in shades of red, yellow, or brown
BC horizon (if it occurs):
Color--hue of 2.5YR to 2.5Y, value of 4 to 8, chroma of 3 to 8
Texture--silty clay loam, sandy clay loam, clay loam, sandy clay, or silty clay
Redoximorphic features (if they occur)--iron depletions in shades of brown or gray and masses of oxidized iron in shades of red, yellow, or brown
C horizon:
Color--hue of 10R to 2.5Y, value of 3 to 8, chroma of 3 to 8
Texture--silt loam, loam, sandy loam, fine sandy loam, sandy clay loam, clay loam, silty clay loam, silty clay, or sandy clay
Redoximorphic features (if they occur)--iron depletions in shades of brown or gray and masses of oxidized iron in shades of red, yellow, or brown
COMPETING SERIES:
Banister soils--formed in clayey fluvial deposits
Halifax soils--formed in materials derived from a mixture of mafic and felsic igneous or high grade metamorphic rock
Latham soils--are moderately deep to paralithic contact and formed in shale residuum
GEOGRAPHIC SETTING:
Landscape: Piedmont basin
Landform: Low hill
Geomorphic Component: Interfluve, head slope, side slope
Hillslope Profile Position: Summit
Parent Material: Residuum from Triassic rock, commonly fine-grained sandstone, siltstone, mudstone, or shale
Slope: 0 to 15 percent
Elevation (type location): 300 to 850 feet
Frost Free Period (type location): 160 to 205 days
Mean Annual Air Temperature (type location): 52 to 57 degrees F.
Mean Annual Precipitation (type location): 40 to 55 inches
GEOGRAPHICALLY ASSOCIATED SOILS:
Ayersville soils--are moderately deep (20 to 40 inches) to soft and hard bedrock and have a fine-loamy particle-size class; on higher landforms
Clover soils--are very deep to bedrock, have moderately shrink-swell potential, and are well drained; on higher landforms
Easthamlet soils--are moderately deep to soft bedrock (deep to hard bedrock), are somewhat poorly drained, and have very high shrink-swell potential; on lower-lying landforms
Pinkston soils--have a coarse-loamy particle-size class and are moderately deep to bedrock; on higher landforms
Rockbarn soils--are moderately deep (20 to 40 inches) to soft bedrock and deep or very deep (40 inches or more) to hard bedrock; on higher landforms
Stoneville soils--are deep (40 to 60 inches) to soft bedrock; on higher landforms
Straightstone soils--are very deep to bedrock and are well drained; on higher landforms
Wolftrap soils--have very high shrink-swell potential and are moderately well drained; on higher landforms
DRAINAGE AND PERMEABILITY:
Depth Class: Very deep
Drainage Class (Agricultural): Moderately well drained or somewhat poorly drained
Internal Free Water Occurrence: Shallow (12 to 24 inches free water), common (present 3 months), and thin (12 to 40 inches thick)
Flooding Frequency and Duration: None
Ponding Frequency and Duration: None
Index Surface Runoff: High or very high
Permeability: Very slow
Shrink-Swell Potential: Moderate
USE AND VEGETATION:
Major Uses: About one-third of the soil is under cultivation or in pasture, and the remainder in mixed hardwood forest
Dominant Vegetation: Where cultivated--tobacco, small grains, and corn.
Where wooded--shortleaf and loblolly pine, oaks, hickory, and gum.
DISTRIBUTION AND EXTENT:
Distribution: Virginia and North Carolina
Extent: Moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Halifax County, Virginia; 2003.
REMARKS: Lackstown soils were previously mapped as Creedmoor soils. The April 1997 adjustment of the mesic/thermic line in the Southern Piedmont Major Land Resource Area necessitated the establishment of a mesic counterpart for the Creedmoor series.
Diagnostic horizons and soil characteristics recognized in this pedon:
Ochric epipedon--the zone from the surface of the soil to a depth of 14 inches (A and E horizons)
Argillic horizon--the zone from a depth of 14 to 54 inches (Bt1, Bt2, Btg1, and Btg2 horizons)
Aquic conditions--periodic saturation and reduction within 28 to 54 inches of the soil surface, and one or more unsaturated layers within 80 inches of the surface, occurring below the periodically saturated zone (episaturation)
Other soil features identified with this pedon:
Series control section--the zone from 0 to 60 inches
ADDITIONAL DATA:
Laboratory Data: No known laboratory data available.
Database Information:
Typical Pedon Data Mapunit ID--103298
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NC0056 LACKSTOWN 0-15 52-57 160-205 40-55 300-850SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness NC0056 NONE 1.0-2.5 PERCHED JAN-MAR >60 -
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- NC0056 0-9 SL FSL L 0-3 95-100 7-20 2-6 NC0056 0-9 LS COSL 0-3 95-100 4-20 1-6 NC0056 9-28 SCL CL SICL 0-3 95-100 20-35 4-8 NC0056 28-54 C SIC SC 0-3 95-100 35-60 7-13 NC0056 54-65 SL SCL SICL 0-5 95-100 5-35 1-8
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll NC0056 0-9 3.5-5.5 0.5-2.0 0-0 2.0-6.0 LOW NC0056 0-9 3.5-5.5 0.5-2.0 0-0 6.0-20 LOW NC0056 9-28 3.5-5.5 0.0-0.5 0-0 0.2-0.6 MODERATE NC0056 28-54 3.5-5.5 0.0-0.5 0-0 0.0-0.06 HIGH NC0056 54-65 3.5-5.5 0.0-0.5 0-0 0.0-0.06 LOW