ريس عراك ر. Response of some vegetative growth ponitars maize zea mays l. To spray potasium and zinc: RANA .R.ARRAK. JKAS [Internet]. 2017 Mar. 1 [cited 2024 Oct. 16];4(1):74-87. Available from: https://mail.journals.uokerbala.edu.iq:8443/index.php/Agriculture/article/view/84