The university is headquartered in the city of Berkeley in Alameda County, on the mainland side of San Francisco Bay in the US state of California. Additional branches are located in Los Angeles, San Francisco, San Diego and Davis. In 1880, it was decided to add viticulture and enology as new branches. However, since Berkeley had too poor climatic conditions for viticulture, an inland branch was established in the city of Davis (Davis is frequent shorthand for the viticulture branch). Eugene Hilgard, an agriculture professor at the time, noted (as one of several) the great importance of grafting in the fight against phylloxera and the connection between climate and the grape variety suitable for it. Prohibition (1920-1933) severely curtailed these activities. Shortly after the lifting of prohibition, the viticulture department was revived at the university in 1935. The focus was on the analysis of grape varieties and the training of the new generation of winemakers.
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