This research aimed to determine the effect of the interaction giving cellulolytic microorganisms and inorganic fertilizers or single factor to the growth of immature oil palm plantations. This research has been conducted in land PT.Tunggal Perkasa Plantation Air Molek, District Pasir Penyu, Indragiri Hulu-Riau. The research was carried out for 4 months, starting from July to October 2012. Thi…