Caption: "Demonstration of Mr. Daw Jacks, near Marianna, Ark., Nov., 1908. Triumph cotton, 1 1/2 bales per acre, Sweet potatoes in foreground, 400 bushels per acre, Corn in background, 65 bushels per acre. Land in cultivation 75 years. (Mr. Jacks holding up stalk of cotton)." GEB photo 4000.36
General Education Board
Rockefeller Archive Center, General Education Board records, series 13, box 48, folder 559
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Marianna (Ark.) Arkansas
General Education Board, “Daw Jacks demonstration field,” 100 Years: The Rockefeller Foundation, accessed May 26, 2017, http://rockefeller100.org/items/show/1963.