Response of Vidal 256 Grapevines to the Geneva Double Curtain and Six Cane Kniffin Training Systems as Grown in South Central Pennsylvania. jpom [Internet]. 1991 Jan. 1 [cited 2026 Aug. 18];45(1):29-33. Available from: https://journal.americanpomological.org/index.php/jofaps/article/view/1889