Saiman, Mohamad Faris, Nur Maizatul Idayu Othman, and Norazlina Abu Sari. “Influence of Copper-Zinc Mixture in Different Rates on PH and Electrical Conductivity As a Potential for Foliar Spray Fertilization”. Journal of Tropical Resources and Sustainable Science (JTRSS) 10, no. 1 (June 30, 2022): 47–50. Accessed July 3, 2024. http://journal.umk.edu.my/index.php/jtrss/article/view/898.