., Kiran, DS Duhan, MK Rana, Harshita Singh, and Makhan Mazoka. “Effect of Phosphorus and Zinc on Plant Growth and Yield of Vegetable Cowpea”. Vegetable Science 45, no. 01 (May 25, 2018): 55-60. Accessed July 3, 2024. https://myresearchjournals.com/index.php/isvs/article/view/13675.