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Cropley Soil Series

USDA Code: CA0121

K-Factor

0.37

Soil Erodibility Factor

Texture Class

clay

Drainage Class

moderately well drained

About Cropley

Deep, moderately well drained soils formed in alluvium from mixed sedimentary and crystalline rock sources. Vertic subgroup with high clay content (>35%) causing moderate to strong shrink-swell. Found on alluvial fans and terraces with slopes of 0 to 2 percent.

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

California Distribution

Widespread on the alluvial fans at the margin of San Francisco Bay in Santa Clara, Santa Cruz, and San Mateo counties. Historically a productive agricultural soil; now largely urbanized in Silicon Valley. Commonly encountered in geotechnical investigations.

Counties Where Found

Alameda
San Mateo
Santa Clara
Santa Cruz

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