The aim of this study was to determine the interaction and main effect of Ecofarming fertilizer and NPK 16:16:16 on the growth of oil palm seedlings in the main nursery on peat soil planting media. This research was carried out at the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Pekanbaru City, for 4 months from August to November 2022. The study used a Completely…