DkB - Dickson

 DkB—Dickson silt loam, 2 to 5 percent slopes

Map Unit Setting

  • National map unit symbol: 2rgxr

  • Elevation: 590 to 1,410 feet

  • Mean annual precipitation: 48 to 58 inches

  • Mean annual air temperature: 57 to 59 degrees F

  • Frost-free period: 190 to 230 days

  • Farmland classification: All areas are prime farmland

Map Unit Composition

  • Dickson and similar soils: 85 percent

  • Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Dickson

Setting

  • Landform: Flats

  • Landform position (two-dimensional): Shoulder

  • Landform position (three-dimensional): Crest

  • Down-slope shape: Linear

  • Across-slope shape: Linear

  • Parent material: Silty loess over clayey residuum weathered from cherty limestone over clayey residuum weathered from limestone and/or clayey residuum weathered from siltstone

Typical profile

  • Ap - 0 to 10 inches: silt loam

  • E/Bt - 10 to 24 inches: silt loam

  • Btx - 24 to 42 inches: silt loam

  • 2Bt - 42 to 72 inches: clay

  • 3Cr - 72 to 82 inches: bedrock

Properties and qualities

  • Slope: 2 to 5 percent

  • Depth to restrictive feature: 20 to 26 inches to fragipan; 69 to 79 inches to paralithic bedrock

  • Natural drainage class: Moderately well drained

  • Runoff class: Low

  • Capacity of the most limiting layer to transmit water (Ksat): Very low to moderately high (0.00 to 0.20 in/hr)

  • Depth to water table: About 12 to 26 inches

  • Frequency of flooding: None

  • Frequency of ponding: None

  • Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)

  • Available water storage in profile: Low (about 5.1 inches)

Interpretive groups

  • Land capability classification (irrigated): None specified

  • Land capability classification (nonirrigated): 2e

  • Hydrologic Soil Group: C/D

  • Hydric soil rating: No

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