Indonesian Journal of Oil Palm Research Volume 31 Number 2 Year 2023 is published by presenting articles: The use of Oil Palm Mesocarp Serat as a Substitute for Synthetic Serat in the Manufacture of Fiberglass Composites, Accuracy Improvement of Basal Stem Rot Disease Identification in Oil Palm Plantation Using Unmanned Aerial Vehicle and Machine Learning, Biofertilizer Application to Enhance The Oil Palm Growth and Productivity, Quantification of Climate Factors Contributing to Variation of Oil Palm Yield, and Mapping of Leaf Nutrient Content Using Multispectral Imagery in Oil Palm Based on Unmanned Aerial Vehicles.