Research on "Test of Boiler Ash Application and NPK 16:16:16 on Oil Palm (Elaeis guineensis Jacq) Nursery in Pre Nursery on Peat Media". The research was conducted at the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Pekanbaru City, from June to September 2023. The purpose of the study was to examine the interaction and main effects of boiler ash and NPK 16:16:16 o…