Dubakella

Dubakella soil series is the name given to a reddish-brown stony loam soil which has developed on ultramafic rock containing magnesium minerals such as serpentine or asbestos.[1] This soil occurs from southwestern Oregon south to the Coast Ranges of California near Healdsburg, and it also is found in the Sierra Nevada mountains and foothills. [2]

In common with other ultramafic soils, Dubakella has a poor balance of nutrients which does not allow the vegetation it supports to match the luxuriance seen on adjacent non-ultramafic sites. Jeffrey Pine is usually the most common tree, accompanied by Douglas-Fir, Incense-Cedar, and Sugar Pine -- all in open, somewhat stunted stands. In some areas, as at Grass Valley, the less stately Gray Pine is dominant.[3] On the poorest sites vegetation may be held to a chaparral-like state.

In addition to being inferior for forestry and poor for agriculture, Dubalkella may present a health hazard due to presence of asbestos. Any Dubakella land which has been developed or is scheduled in that direction should be tested.[4]

  1. ↑ https://soilseries.sc.egov.usda.gov/OSD_Docs/D/DUBAKELLA.html Official Series Description
  2. ↑ http://casoilresource.lawr.ucdavis.edu/see/#dubakella Series Extent Explorer (DUBAKELLA)
  3. ↑ https://www.google.ca/maps/@39.2258162,-121.0474607,3a,75y,291.18h,76.97t/data=!3m4!1e1!3m2!1sH_ppfDYbTkOzB_i11BCCzA!2e0!6m1!1e1 Archived 2017-08-12 at the Wayback Machine.
  4. ↑ http://www.epa.gov/superfund/health/contaminants/asbestos/pdfs/noa_factsheet.pdf Naturally Occurring Asbestos:Approaches for Reducing Exposure
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