Syarovy, Muhdan, Eko Noviandi Ginting, Dimas Wiratmoko, and Heri Santoso. “OPTIMALISASI PERTUMBUHAN TANAMAN KELAPA SAWIT DI TANAH SPODOSOL”. Jurnal Online PERTANIAN TROPIK 2, no. 3 (1): 340- 347. Accessed May 7, 2024. https://talenta.usu.ac.id/jpt/article/view/2942.