Pit Soil Series

About Pit

Deep, poorly drained soils formed in alluvium from basaltic rock sources with significant influence from basalt residuum. Montmorillonitic clay mineralogy causes strong shrink-swell. Found on basaltic plateaus and alluvial plains at 4,000–5,500 ft.

K-factor values are sourced from the USDA Natural Resources Conservation Service (NRCS) SSURGO database.

California Distribution

One of the most extensive soils of the Modoc Plateau, mapped across large areas of Modoc and Siskiyou counties. The Pit River drainage system gives this series its name; used for range and grain farming.

Counties Where Found