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, [S. l.], v. 4, n. 1, p. 15–19, 2019. DOI: 10.24017/science.2019.1.3. Disponível em: https://kjar.spu.edu.iq/index.php/kjar/article/view/264.. Acesso em: 8 aug. 2025.