“Effect of Indoleacetic Acid and Zinc Sulphate Application on Growth and Some Physiological Parameters of Cowpea (Vigna Sinensis Savi) Plants”. Kurdistan Journal of Applied Research 4, no. 1 (June 20, 2019): 15–19. Accessed August 9, 2025. https://cpanel.spu.edu.iq/index.php/kjar/article/view/264.