Indonesian Journal of Oil Palm Research Volume 29 Number 1 Year 2021 is published by presenting articles: The Use of Alcohol and Sodium Hypochlorite as Single Sterilizing Agents for Oil Palm Explant Sterilization; A Water Balance’s Effect on Oil Palm Productivity under Varying Soil Types: Case Study in Central and West Kalimantan; Physicochemical Properties of Oil Mixtures from Virgin Red Palm Oil with Olive Oil, Corn Oil, Soybean Oil or Sunflower Oil; Comparison of Roundtable On Sustainable Palm Oil (RSPO), Indonesian Sustainable Palm Oil (ISPO), and Malaysian Sustainable Palm Oil (MSPO); and The Exploration of The Oil Palm Leaf Nutrients Content Using Unmanned Aerial Vehicle and Multispectral Camera.