Abbas A-AM, Hasan AM. Effect of spraying zinc , tryptophan and thiamin on growth and yield of grapevine cv. "khalili". JKAS [Internet]. 2018 Mar. 29 [cited 2024 May 2];5(1):30-48. Available from: https://journals.uokerbala.edu.iq/index.php/Agriculture/article/view/145