ديب . ع. ., صهيوني . ف. ., & ابودرعى ع. . (2022). Effect of Spraying Gibberellic acid (GA3) , urea and zinc on some production indicators of Orange trees c.v.Valencia. Tishreen University Journal -Biological Sciences Series, 43(6), 241–252. Retrieved from https://journal.tishreen.edu.sy/index.php/bioscnc/article/view/11587