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INTERPRETIVE GUIDE TO THE SOILS - Fauquier County

INTERPRETIVE GUIDE TO THE SOILS - Fauquier County

Table. Summary of Soil

Table. Summary of Soil Characteristics and Use Potential (**-- not part of official soil survey) MAP. UNIT SYMBOL SOIL NAME SLOPE 75C Casanova loam 8 - 15% 75D** Casanova loam 15 - 25% 76B Sudley-Oatlands complex 3 - 8% 76C Sudley-Oatlands complex 8 - 15% 76D** Sudley-Oatlands complex 15 - 25% 77A** Arcola - Nestoria complex 0 - 3% 77B** Arcola - Nestoria complex 3 - 8% SOIL CHARACTERISTICS Very deep, well drained, dark-red and reddish yellow clayey soils on strongly sloping backslopes; developed in residuum from Triassic conglomerate, shale and siltstone Very deep, well drained, dark-red and reddishyellow clayey soils on moderately steep backslopes; developed in residuum from interbedded Triassic conglomerate, shale and siltstone Complex of very deep (Sudley) and moderately deep (Oatlands) well drained strong brown to reddish-brown loamy soils on summits and gently sloping backslopes; developed in residuum from Triassic conglomerate and sandstone Complex of very deep (Sudley) and moderately deep (Oatlands) well drained strong brown to reddish-brown loamy soils on undulating summits and strongly sloping backslopes; developed in residuum from Triassic conglomerate and sandstone Complex of very deep (Sudley) and moderately deep (Oatlands) well drained strong brown to reddish-brown loamy soils on moderately steep backslopes; developed in residuum from Triassic conglomerate and sandstone Moderately deep, well drained dark red silty soil (Arcola) and shallow, well to excessively drained, yellowish red silty soil containing more than 35% rock fragments in the subsoil (Nestoria), on nearly level summits; developed in residuum from Triassic siltstone and shale Moderately deep, well drained dark red silty soil (Arcola) and shallow, well to excessively drained, yellowish red silty soil containing more than 35% rock fragments in the subsoil (Nestoria), on gently sloping backslopes and summits; developed in residuum from Triassic siltstone and shale EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP High 0.37, 0.28 B High 0.37, 0.28 B Moderate 0.32, 0.15 B Moderate 0.32, 0.15 B High 0.32, 0.15 B Slight 0.32, 0.10 C Moderate 0.32, 0.10 C USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER GOOD Bearing Capacity: moderate Shrink-swell Potential: moderate FAIR steep slopes Bearing Capacity: moderate Shrink-swell Potential: moderate GOOD Bearing Capacity: moderate Shrink-swell Potential: low GOOD Bearing Capacity: moderate Shrink-swell Potential: low GOOD Bearing Capacity: moderate Shrink-swell Potential: low FAIR shallow to rock; little soil available for landscaping or grading Bearing Capacity: low Shrink-swell Potential: low FAIR shallow to rock; little soil available for landscaping or grading Bearing Capacity: low Shrink-swell Potential: low DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD MARGINAL percs slowly MARGINAL percs slowly steep slopes MARGINAL shallow to rock MARGINAL shallow to rock MARGINAL shallow to rock steep slopes POOR shallow to rock POOR shallow to rock AGRICULTURE SECONDARY CROPLAND PRIME PASTURE PRIME CROPLAND SECONDARY CROPLAND PRIME PASTURE PRIME PASTURE PRIME PASTURE FORESTRY (HARDWOOD) MODERATE MODERATE MODERATELY LOW MODERATELY LOW MODERATELY LOW LOW LOW LAND USE CAPABILITY CLASS IIIe IIe IIIe

Table. Summary of Soil Characteristics and Use Potential (**-- not part of official soil survey) MAP. UNIT SYMBOL SOIL NAME SLOPE 77B3** Arcola - Nestoria complex, gullied 3 - 8% 77C Arcola - Nestoria complex 8 - 15% SOIL CHARACTERISTICS Moderately deep, well drained dark red silty soil (Arcola) and shallow, well to excessively drained, yellowish red silty soil containing more than 35% rock fragments in the subsoil (Nestoria), with gullies on gently sloping backslopes; developed in residuum from Triassic siltstone and shale Moderately deep, well drained dark red silty soil (Arcola) and shallow, well to excessively drained, yellowish red silty soil containing more than 35% rock fragments in the subsoil (Nestoria), with gullies on strongly sloping backslopes; developed in residuum from Triassic siltstone and shale 77C2 SEE MAP UNIT 77C 77C3** Shallow, well to excessively drained (Nestoria), and moderately deep, well drained Nestoria – Arcola (Arcola) eroded reddish-brown silty soils with complex, gullied gullies on convex sideslopes in dissected terrain; developed in residuum from Triassic 8 - 15% siltstone and shale 77D** Nestoria gravelly loam 15 - 25% Shallow, well to excessively drained reddishbrown loamy soils containing more than 35% rock fragments on moderately steep backslopes; developed in residuum from Triassic siltstone and shale 77D2 SEE MAP UNIT 77E 77E Shallow, well to excessively drained reddishbrown loamy soils containing more than 35% Nestoria gravelly rock fragments on steep backslopes; developed loam in residuum from Triassic siltstone and shale 25 - 45% EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP High 0.32, 0.10 C High 0.32, 0.10 C High 0.32, 0.10 D Very High 0.32, 0.10 D Very high 0.32, 0.10 D USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER POOR shallow to rock; little soil available for landscaping or grading; gullies Bearing Capacity: low Shrink-swell Potential: low FAIR shallow to rock; little soil available for landscaping or grading Bearing Capacity: low Shrink-swell Potential: low POOR shallow to rock; little soil available for landscaping or grading; gullies Bearing Capacity: low Shrink-swell Potential: low POOR shallow to rock; steep slopes; little soil material available for landscaping or grading Bearing Capacity: low Shrink-swell Potential: low POOR shallow to rock; very steep slopes; little soil material available for landscaping or grading Bearing Capacity: low Shrink-swell Potential: low DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD NOT SUITED shallow to rock POOR shallow to rock NOT SUITED shallow to rock NOT SUITED shallow to rock Steep slopes NOT SUITED shallow to rock very steep slopes AGRICULTURE SECONDARY PASTURE SECONDARY PASTURE SECONDARY PASTURE SECONDARY PASTURE SECONDARY PASTURE FORESTRY (HARDWOOD) LOW LOW LOW LOW LOW LAND USE CAPABILITY CLASS IVs VIIe

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