Indonesian Journal of Oil Palm Research Volume 27 Number 3 Year 2019 is published by presenting articles: The Effectiveness of Fluroksipir MHE 480 g/l Herbicides as Controlling Chromolaena odorata (L.) Weeds On Mature Oil Palm; Evaluation for Compact Character of Third Cycle Progeny Test in IOPRI’s Oil Palm Breeding Program; Analysis of the Influencing Factors of  the Indonesian Palm Kernel Oil Trade Performance in Main Importer Countries; Insect Biodiversity in Oil Palm Ecosystem which Exposed Long-Term Insecticides Application; and Simulation and Analysis of Water Management System in Tidal Swamp Land: The Initial Study of Oil Palm Plantation in South Kalimantan.