If one looks at the crop succussion timeline for the Salinas Valley, they will see that potatoes were once an important crop.
However, according to the 2017 Crop Report, in 2017, no potatoes were grown in the Salinas Valley.
Books and References
Monterey County Crop Report. Monterey County Ag Commissioner’s Office. 2017 http://www.co.monterey.ca.us/home/showdocument?id=65737