Sari, Desi Pramida, Warnita Warnita, and Muhsanati Muhsanati. “Impact of Eggshells on Growth and Production of Soybean (Glycine max(L) Merril) in Ultisol”. International Journal of Environment, Agriculture and Biotechnology 8, no. 2 (April 30, 2023). Accessed December 4, 2024. https://i.agriculturejournals.org/index.php/ijeab/article/view/154.