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Dekalb soil and landscape

Soil profile: Dekalb very channery loam. This Dekalb soil, which formed under forests, has dark organic horizons at a depth of 0 to 10 centimeters. Dekalb soils have bedrock at a depth of 50 to 100 centimeters. In this photo, bedrock occurs at a depth of approximately 70 centimeters. (Soil Survey of New River Gorge National River, West Virginia; by Wendy Noll and James Bell, Natural Resources Conservation Service)

 

Landscape: An area of a Layland-Dekalb-Rock outcrop complex, 55 to 80 percent slopes, extremely stony. The extremely stony Layland soil is in the foreground, and the Dekalb soils and Rock outcrop are in the background.

 

Layland-Dekalb-Rock outcrop complex, 55 to 80 percent slopes, extremely stony

Map Unit Setting

Major land resource area (MLRA): 127—Eastern Allegheny Plateau and Mountains

Landscape: Mountains

Elevation: 250 to 874 meters

Mean annual precipitation: 1,034 to 1,289 millimeters

Mean annual air temperature: 5 to 17 degrees C

Frost-free period: 141 to 190 days

 

Map Unit Composition

Layland and similar soils: 45 percent

Dekalb and similar soils: 30 percent

Rock outcrop: 10 percent

Dissimilar minor components: 15 percent

 

Description of the Dekalb Soil

Soil Classification: Loamy-skeletal, siliceous, semiactive, mesic Typic Dystrudepts

 

Setting

Landform: Convex mountain slopes

Landform position (two-dimensional): Shoulder and backslope

Landform position (three-dimensional): Mountain flank and nose slope

Down-slope shape: Convex

Across-slope shape: Convex

Aspect (representative): Southwest

Aspect range: All aspects

Slope range: 55 to 80 percent

Parent material: Acid loamy residuum weathered from sandstone

 

Properties and Qualities

Depth to restrictive feature: 51 to 102 centimeters to lithic bedrock

Shrink-swell potential: Low (about 2.1 LEP)

Salinity maximum based on representative value: Nonsaline

Sodicity maximum: Not sodic

Calcium carbonate equivalent percent: No carbonates

Hydrologic Properties

Slowest capacity to transmit water (Ksat ): High

Natural drainage class: Well drained

Flooding frequency: None

Ponding frequency: None

Seasonal water table: None within a depth of 160 centimeters

Available water capacity (entire profile): Moderate (about 8.0 centimeters)

 

Interpretive Groups

Land capability subclass (nonirrigated areas): 7s

West Virginia grassland suitability group (WVGSG): Not Suited (NS)

Dominant vegetation map class(es):

Oak - Hickory Forest

Oak / Ericad Forest

Eastern Hemlock - Chestnut Oak / Catawba Rhododendron Forest

Hydric soil status: No

Hydrologic soil group: A

 

Representative Profile

A—very channery highly organic sandy loam

Bw—very channery loam

BC—extremely channery loam

R—bedrock

 

For additional information about the survey area, visit:

www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/west_virginia/...

 

For a detailed description, visit:

soilseries.sc.egov.usda.gov/OSD_Docs/D/DEKALB.html

 

For acreage and geographic distribution, visit:

casoilresource.lawr.ucdavis.edu/see/#dekalb

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Uploaded on February 23, 2011
Taken in January 2000