FIRST AGRICULTURAL ERA | By the dawn of the 20th century, Luther Burbank, botanist, horticulturist and pioneer, had arrived and introduced over 800 varieties of fruits, flowers, grains, grasses, and vegetables to the region. The wine business was booming with over 250 wineries in the region by the turn of the century. Hops were also a major crop in Sonoma at the time, at one point leading the world in production. Both industries were severely affected by Prohibition. By its end in 1933, less than 50 wineries had survived, and the hop fields disappeared completely.