The Archive of Documentary Arts has a wide range of works that relate to agricultural history. The collection is particularly rich with sources that touch upon agricultural economy, farm labor, and labor activism.
Image is part of the Tobacco Series in the Chris Johnson Farmworker Photographs, 1990s.
These links will lead you to oral history and other documentary arts projects that touch upon American food cultures.
Part of the Southern Foodways Alliance's Carrboro Farmers' Market Oral History Project.