“EFFECTIVENESS OF NPK 15-15-15 FERTILIZER COMBINED WITH EGG SHELL FLOUR ON THE GROWTH OF OIL PALM (ELAEIS GUINEENSIS JACQ.) SEEDLINGS: EFEKTIVITAS PUPUK NPK 15-15-15 YANG DIKOMBINASIKAN DENGAN TEPUNG CANGKANG TELUR TERHADAP PERTUMBUHAN BIBIT KELAPA SAWIT (Elaeis Guineensis Jacq.)”. ROCE : Jurnal Pertanian Terapan 3, no. 1 (January 31, 2026). Accessed February 5, 2026. https://jurnal.rocewisdomaceh.com/index.php/roce/article/view/173.