Kakar, Zia-ul-haq, Sajida Parveen, Sabir Gul Khattak, and Zahid Saleem. “Effect of Different Types of Surfectants on Zinc Efficiency in Spinach Yield”. International Journal of Sustainable Agricultural Research 1, no. 2 (June 16, 2014): 45–51. Accessed December 22, 2024. https://archive.conscientiabeam.com/index.php/70/article/view/211.