This subseries consists of newsletters, publications, and trial reports related to tomatoes. Topics covered include economic studies, fresh market tomatoes, ethel studies, marketing tomatoes, green tomatoes, population trials, mildew on tomatoes, and California Fresh Market Tomato Advisory Board.

This series consists of subject research files compiled by various Farm Advisors documenting agricultural trials, research findings, extension outreach, and professional engagement in a range of crop production areas. Materials include publications, newsletters, photographs, trial data, experimental reports, newspaper clippings, lecture notes, and administrative documentation. The series is divided into six subseries, each focusing on specific crop types.