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Agricultural worker using a Caterpillar 20 tractor to cultivate a grape vineyard

Agricultural worker using machine for gthering seed from guayule plants

Agricultural workers at an onion seed farm in Santa Clara County, California

Agricultural workers drying out prunes

Agricultural workers fumigating orange trees

Agricultural workers harvesting avocados from the Calavo Grove

Agricultural workers harvesting celery in Los Angeles County, California

Agricultural workers harvesting peaches

Agricultural workers harvesting ripe olives in Los Angeles, California

Agricultural workers in Livermore, circa 1900

Agricultural workers irrigating an orange tree grove, Los Angeles, California

Agricultural workers picking oranges

Agricultural workers picking oranges, California

Agricultural workers picking oranges in California

Agricultural workers planting orange trees

Agricultural workers posing in front of a large machine

Agricultural workers processing hops crops

Agricultural workers steam plowing in Stockton, California

Agricultural workers treating a citrus orchard with pesticides

Agricultural workers with a dog picking oranges in California

Agricultural workers with steam combine at Miller Brothers Ranch, Colusa County, 1890

Agricultural workers with steam combine at Miller Brothers Ranch, Colusa County, circa 1890

Alamitos Avenue from south of East 3rd Street, Long Beach

Alfalfa field and orange grove near Porterville, Tulare County