Silas York (of the York Family) becomes a partner in A. York and Sons.

By 1902 A. York and Sons Winery was making 40,000 gallons of wine per year. They sold locally but also shipped wine to the East Coast in railroad tank cars.


The Dallidet vineyards, lost to the Commercial Bank, are subdivided for housing as the La Viña Tract.

The California Legislature created an agricultural college for California. Money was appropriated to buy 779 acres at Davis, a few miles west of Sacramento with the goal of establishing a University Farm for experimentation and for teaching the sons and daughters of California’s farmers at the University of California at Berkeley. The College did not award degrees, but it gradually became part of the Department of Agriculture, a development formalized in 1922. Eventually the College became a separate campus of the University with its own Department of Agriculture.


A. York and Sons Winery signs a contract to sell large amounts of wine to a Wine Merchant in San Francisco. The contract is the first one to specify that the wine must be shipped in Puncheons, must be transported by wagon to the train station and shipped according to instructions by the Merchant.

A. York and Sons purchase additional land and plants grapes.

The York family expand the winery. The family makes the bricks and adds extensions to the original winery.


Frenchman Adolphe Siot sells his land and winery to Joe Rotta. Adolphe becomes Joe Rotta’s mentor and teaches him how to care for the vineyards and how to make wine. Their friendship and working relationship continues into the 1920s.


Joe Rotta buys the Siot vineyard and winery, heralding a period of Italian dominance, with the Dusi and Pesenti families, of county grape growing and winemaking through the 1960s.
The first practical course on viticulture was offered at UC Davis.


Frederic Bioletti came to UC Davis to take charge of the Viticulture Program.


Grapevines were listed in the State Agriculture report of 1910 in “numbers of bearing grapevines” which were 265,481 (California State Board of Agriculture Statistical Report (Sacramento, California State Printing Office, 1919-1922, pages 318 and 421).