Albari, Jabal, Supijatno., and Sudradjat. “Peranan Pupuk Nitrogen Dan Fosfor Pada Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.) Belum Menghasilkan Umur Tiga Tahun”. Buletin Agrohorti 6, no. 1 (January 23, 2018): 42-49. Accessed July 21, 2024. https://jurnal.ipb.ac.id/index.php/bulagron/article/view/16822.