A comprehensive history of agriculture in Shasta County can be learned on Saturday as the Shasta Historical Society hosts a free documentary screening at the Cascade Theater. It’ll be the debut of the film, entitled “Shasta County Farm Bureau: 100 Years And 100 More”. It features stories of agricultural families, from beekeepers to cattle ranchers as it traces the history of farming and ranching from the first white settlers to the present day. The presentation starts at 2 O’clock Saturday at the Cascade.