RIFANI, M. A.; YOSEPHINE, I. O. The Effect of Providing Boiler Ash as a Planting Medium on Plant Growth of Vegetative Seeds of Coconut Palm Oil (Elaeis guineensis Jacq.) in Pre-Nursery . JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA), v. 8, n. 2, p. 616 -, 1 May 2026.