Wu Rui-Hong, Tay Chia-Chay, Li He, and Liu Zhao. “Preparation and Properties of Kaolin Based Slow-Release Fertilizer”. Journal of Advanced Research in Applied Sciences and Engineering Technology 30, no. 2 (April 19, 2023): 205–215. Accessed May 6, 2024. https://semarakilmu.com.my/journals/index.php/applied_sciences_eng_tech/article/view/1542.