The research aimed to determine the optimal NPK fertilizer dosage for growing of oil palm seedling (Elaeis guineensis Jacq.) of the Yangambi and Dumpy varieties in the pre-nursery. The research was conducted at the Rubber and Oil Palm Plantation Research Area of PT Pupuk Sriwidjaja, Indralaya Utara District, Ogan Ilir Regency, South Sumatra, at coordinates 3°10'33"S 104°40'26"E, from November…