Indonesian Journal of Oil Palm Research Volume 34 Number 1 Year 2026 is published by presenting articles: Growth Responses and Phosphate Nutrient Uptake of Oil Palm Nursery (Elaeis guineensis Jacq.) on Peat Media Applied Ameliorants and Biofertilizers, Implementation of YOLOv5 for Estimating the Number of Oil Palm (Elaeis guineensis Jacq.) Trees, The Ideal Age Composition in Oil Palm Plantation, The Effect of Water on The Changes in Physical, Chemical, and Microstructural Properties of Oil Palm Empty Fruit Bunch Biochar, and The Impact of Company Size, Beta, and ESG Ratings on the Efficiency of Palm Oil Companies Listed on the IDX during Crisis Periods.

Indonesian Journal of Oil Palm Research Volume 33 Number 3 Year 2025 is published by presenting articles: The Role of Media in Agenda Setting: Environmental Impact Discourse of Indonesian Palm Oil Industry, (Prediction of Combining Ability and DxT Progeny Keragaannce of Oil Palm (Elaeis guineensis Jacq.)), Growth Response of OiI PaIm (EIaeis guineensis Jacq.) in the First Year of Mature Phase to the AppIication of OiI PaIm Empty Fruit Bunch Compost and Humic Acid, Optimization of Microcrystalline Cellulose Production from Oil Palm Empty Fruit Bunch Cellulose Using Response Surface Methodology, and Bird Diversity in Oil Palm (Elaeis guineensis Jacq.) Plantation Landscapes as a Conservation Model.

Indonesian Journal of Oil Palm Research Volume 33 Number 2 Year 2025 is published by presenting articles: Effect of Drought Stress on Vegetative Growth and Curvularia oryzae Leaf Spot Disease Severity on Oil Palm (Elaeis guineensis) Seedlings, Assessing the Sustainability Level of Oil Palm Smallholders Plantation Business using Application of RAPPO Method in Simalungun District, North Sumatra, Morphological Response of Oil Palm Seedlings to Fertilizer Application, The Impact of Enhancing CPO Productivity and Production Capacity in the CPO Downstream Industry on Indonesian Biodiesel Production, and R&D Expenditures and Firm Performance of Plantation Firms Listed on the Indonesia Stock Exchange (IDX), 2019–2023.

Indonesian Journal of Oil Palm Research Volume 33 Number 1 Year 2025 is published by presenting articles: Analysis of Consumer Attitudes, Preferences, and Satisfaction Towards Germinated Oil Palm Seeds Indonesian Oil Palm Research Institute, Utilization of Mechanization in the Process of Yield Transporting in Oil Palm Plantations, The Effect of Application of Mycorhyza and Inorganic Fertilizers on The Growth of Palm Seedlings in Pre and Main Nursery, Microorganism Identification of Contaminant on Oil Palm (Elaeis guineensis Jacq.) Tissue Culture, and (Single Nucleotide Polymorphism (SNP) Analysis of the Laccase-24 (EgLCC24) Gene in the Resistance of Oil Palm (Elaeis guineensis Jacq.) to Ganoderma boninense).

Indonesian Journal of Oil Palm Research Volume 32 Number 3 Year 2024 is published by presenting articles: Matriconditioning as an Invigoration Method on Oil Palm (Elaeis guineensis L. Jacq) Seeds, More Effective and Efficient Method to Measure Moisture Content of Oil Palm (Elaeis guineensis L. Jacq) Seeds, Production and Income Risk of RSPO Certified and Non-Certified Oil Palm Smallholders, Application Of Multi-Criteria Decision Analysis using The PROMETHEE Method in Initial Selection of Dura Mother Palm Trees: A Case Study of Field Observation Data in The IOPRI BJ43S (DxD) Experimental Estate, Bah Jambi, North Sumatra, and (Effect of Phosphate Solubilizing Bacteria and P Fertilizer on Maize Growth (Zea mays L.) on Mature Oil Palm (Elaeis guineensis Jacq.) Stage 1

Indonesian Journal of Oil Palm Research Volume 32 Number 2 Year 2024 is published by presenting articles: Infectiveness And Effectiveness Tests Of Arbuscula Mycorrhizal Fungi (AMF) In Increasing The Availability Of Nutrient P, Total Microbes, And Soil Respiration In Palm Oil (Elaeis guineensis Jacq.) Seeds, Diagnosis of Macronutrients in Oil Palm (Elaeis guineensis Jacq.) Using DOP and DRIS Methods, Application Of Urea Coated By Humic Acid and Nitrogen Inhibitor On Pre Nursery Phase Oil Palm (Elaeis guineensis Jacq.) Seedling, Potential of Combination of Garlic Extract and Polyphenols as a Curative Method for Controlling Ganoderma boninense, and Can Oil Palm Smallholders Become Financially Independent?.  

Indonesian Journal of Oil Palm Research Volume 32 Number 1 Year 2024 is published by presenting articles: Analysis of Water Behavior in Oil Palm Plantations on Spodosol and Ultisol Using Soil Moisture Content Monitoring System (SMCMS), (Plant Community Composition Under Mature Oil Palm Stands), Low-Cost In vitro Propagation of Oil Palm Through the Use of Bulk/Commercial Agar and Sugar, Chemical Characteristics of Acid Sulphate Soil at Various Depths of Sulfuric Layers and Their Impact on The Development of Oil Palm Plant Roots, and The Implementation of Indonesian National Standard (SNI) on Palm Oil Seed Production in Indonesia.

Indonesian Journal of Oil Palm Research Volume 31 Number 3 Year 2023 is published by presenting articles: Potassium Use Efficiency of Natural Zeolite-Based Potassium Fertilizer in Oil Palm Seedlings (Elaeis guineensis Jacq.) Using Peat Soil Media, Potential of Fumyco (Arbuscular Mycorrhiza Fungi) in Increasing The Growth of Oil Palm (Elaeis guineensis Jacq.) Seedling in Nursery, Social Conflict, Legal and Financial Analysis in the Feasibility Study of Smallholder's Oil Palm Plantation Partnership: A Case Study in the Agrarian Conflict of KKPA Bongkal Malang, Indragiri Hulu Regency, Riau Province, (Effect of Liquid Organic Ingredients from Banana Peel and Rice Wash Water on Oil Palm Seedling Growth (Elaeis guineensis Jacq.) in Pre-nursery), and The Effect Of Empty Bunch Applications On Production Of Oil Palm.

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.

Indonesian Journal of Oil Palm Research Volume 31 Number 1 Year 2023 is published by presenting articles: Validation of Early Infection Markers for Ganoderma in Oil Palm at Three Endemic Ganoderma Locations, The Effect of Oil Palm Empty Fruit Bunch and Kernel Meal Composition as Black Soldier Fly Larvae (Hermetia Illucens) Feedstock on Driving the Changes in Larval Fatty Acids Composition, Improvement of Soil Chemical Properties and Growth of TM-1 Oil Palm with Combination of Inorganic-Organic Fertilizer and Asystasia gangetica (L.) T. Anderson as Cover Crop, Evaluation of Indigenous Plant Growth-Promoting Bacteria (PGPB) From The Oil Palm Rhizosphere in Oil Palm Nursery, and Social Sustainability Assessment of Oil Palm Smallholders Business Partnership and Its Relation to The Achievement of Sustainable Development Goals: Case Study in North Sumatra Province.

Indonesian Journal of Oil Palm Research Volume 30 Number 3 Year 2022 is published by presenting articles: Effect of Mycorrhizal Consortium Application on Plant Growth and the Development of Ganoderma Disease in Oil Palm Nursery, Rats Community, Attack, and Its Control Efforts on Smallholder Oil Palm In Kuantan Singingi, The Role of Ortet Sources, Fronds and Incubation to Callus Production of Oil Palm (Elaeis guineensis Jacq.), Analysis of Critical Point for Quality Assurance of Palm Oil Seed in Indonesia,  and Does rainfall affect the oil palm bunch ripening and increase the number of loose fruits?

Indonesian Journal of Oil Palm Research Volume 30 Number 2 Year 2022 is published by presenting articles: The Effect of The use of Palm Oil and Palm Olein Mixtures on Physicochemical and Sensory Properties of Chocolate Spread, (Growth Evaluation of Asystasia gangetica (L.) T. Anderson as a Cover Cover in Mature Oil Palm Plantations on Different Plant Spacing and Types of Stem Cuttings), The Design of a Motorized Palm Portable Harvesting Tool using a Flexible Shaft, Comparison of Crude Palm Oil (CPO) Competitiveness Between Indonesia and Malaysia in The International Market, and Flood Mitigation of Peatlands on Oil Palm Plantation Based on HEC-RAS 2D Model.

Indonesian Journal of Oil Palm Research Volume 30 Number 1 Year 2022 is published by presenting articles: Comparasion Study of Sludge Separator and 3 Phase Decanter Performance in Palm Oil Mill (POM), Parental Selection Based on Breeding Value of Dura x Tenera Bunch Component, Technique to Estimate Oil Palm Transpiration Using Heat Ratio Method, Determination of RGB and Grayscale Value on Palm Oil (Elaeis guineensis Jacq.) Fresh Fruit Bunch (FFB) Images using MATLAB, and Characterization and Mechanical Properties Analysis of Cellulose Ester Derived From Oil Palm Empty Fruit Bunch for 3D Printing Alternative Materials.

Indonesian Journal of Oil Palm Research Volume 29 Number 3 Year 2021 is published by presenting articles: Effect of Coumatetralyl and Sarcocystis Singaporensis Application on RAT Attack in Oil Palm Plantation, Production and Characterization of Microcrystalline Cellulose from Oil Palm Trunk Waste (Elaeis guineensis Jacq.) from Plantation Replanting, Preference Study of Merck in Palm Oil Mill using Analytical Hierarcy Process, Preliminary Study of Vitamin E Content in IOPRI'S Oil Palm Varieties, and Characteristic Observation of Cordyceps Militaris (L) Wild Type Strain from Five Oil Palm Plantation in Muara Wahau East Borneo.

Indonesian Journal of Oil Palm Research Volume 29 Number 2 Year 2021 is published by presenting articles: Effect Calcium Carbonat (CaCO3) Addition on FreeFatty Acid Content of Restored Palm Oil Fruit; Conservation of Pisifera Genetic Resources: Callogenesis of Oil Palm Derived SP540T 41-Year-Old; Genome-Wide SNP Identification of The Elaeis guineensis x Elaeis oleifera Population; Genome-Wide Association Study (GWAS) for Bunch Components of The Interspecific Population of Elaeis oleifera and Elaeis guineensis; and Study of Density and Diversity of Soil Organisms Under Mature Oil Palm on Peatland.

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.

Indonesian Journal of Oil Palm Research Volume 28 Number 3 Year 2020 is published by presenting articles: Determination of Yield, Quality and Chemical Composition of Palm Oil and Palm Kernel Oil of Fresh Fruit Bunches with Variation Maturity as A Basic for Determining Harvest Maturity Standard; Performance of Random Forest Group for Basal Stem Rot Disease Classification Caused by Ganoderma boninense in Oil Palm Plantation; Changes on Moisture Content and Electrical Conductivity of Oil Palm (Elaeis guineensis L.) Seeds During Short Period Storage Using Polypropylene and Vacuum Plastic in AC Controlled Room; Growth Response of Oil Palm Seedlings to Empty Fruit Bunch Mulching and Watering Frequency Adjustment; and Calcium Addition Improving Pectin Level in Oil Palm Seedlings (Elaeis guineensis Jacq.).

Indonesian Journal of Oil Palm Research Volume 28 Number 2 Year 2020 is published by presenting articles: DNA Fingerprinting of Tissue Culture Material by Using SSR and AFLP; Soil Fertility, Oil Palm Growth and Productivity on Three Pyritic Depths; Water Table Fluctuations Impact on Oil Palm Low Frond Desiccation Case Study in North Sumatra Peatland; The Oil and Kernel Content of Outer Fruit During Variation of Maturation and Lodging of Oil Palm Fruit Bunches; and Effectiveness of Indaziflam and Glyphosate Tank Mix to Control Weed in Mature Oil Palm.

Indonesian Journal of Oil Palm Research Volume 28 Number 1 Year 2020 is published by presenting articles: Distribution of vascular bundles and physical properties analysis of variety DxP oil palm trunk based on various zones and trunk heights, Validation of zeatin analysis method using ultra high performance liquid chromatography (UHPLC) technique on oil palm (Elaeis guineensis Jacq.) In vitro culture study, The effect of exposure time of plant growth regulator to abnormality rate of oil palm clones, Characteristics of CO₂ emission on peatland under oil palm trees, and Application of cow manure to improve soil chemical characteristics and promote vegetative growth of oil palm (Elaeis guineensis Jacq.) seedling on sub soil media.

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.

Indonesian Journal of Oil Palm Research Volume 27 Number 2 Year 2019 is published by presenting articles: The growth of oil palm with oil palm midrib organic fertilizer and humic acid; Application of palm kernel oil based Cocoa Butter Substitute (CBS) in formulation of insant coffee, chocolate and mix drinks; Characteristics of flower and fruit development of 35 Angola accessions of Indonesian Oil Palm Research Institute’s collection at Adolina Estate of PT Perkebunan Nusantara IV; Economic value of oil palm sap as potentially financing for oil palm smallholders; and Soil fertility and photosythesis rate of oil palm showing white stripe symptoms in peat land in Labuhan Batu.

Indonesian Journal of Oil Palm Research Volume 27 Number 1 Year 2019 is published by presenting articles: Analysis of indonesia's market position in Refined Palm Oil (RPO) market in importer countries; The insecticide effect to the activity and emergence of Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae) on oil palm (Elaeis guineensis Jacq.) male inflorescence; Genetic distance of 47 accessions of oil palm (Elaeis guineensis Jacq.) germplasm from cameroon based on morphological character; Impact of potassium and drought stress on nutrient uptake and production of palm oil (Elaeis gueenensis Jacq.) seedling biomass; and Phenological observation on eight oil palm (Elaeis guineensis Jacq.) varieties using thermal unit concept.

Indonesian Journal of Oil Palm Research Volume 26 Number 3 Year 2018 is published by presenting articles:  Water dynamics and flowering phase that determines oil palm productivity; Potential several weeds as cover crop in mature oil palm plantation; Effect of flubendiamida against nettle caterpillar Setothosea asigna van Eecke, bagworm Metisa plana Walker, bunch moth Tirathaba rufivena Walker of oil palm and it's impact to the activity of pollinator weevil Elaeidobius kamerunicus Faust.; Financial and economic analysis of intercropping (maize and soybean) with immature oil palm ; and The aplication of high constant-temperature oven method and intact seed utilization on determining seed moisture content of oil palm (Elaeis guineensis L. Jacq.)

Indonesian Journal of Oil Palm Research Volume 26 Number 2 Year 2018 is published by presenting articles: Utilization of candlenut shell charcoal (Aleurites moluccana (L.) Willd.) as adsorben on refinery of Crude Palm Oil (CPO); Application of an Artificial Neural Network (ANN) model for predicting oil palm Fresh Fruit Bunch (FFB) yield based on rainfall and the previous level of yield; Utilization of endophytic bacteria to improve the oil palm (Elaeis guineensis Jacq.) seedlings growth; Nutrients use efficiency of several types of fertilizers on the oil palm seedling; and Fatty acid and carotene composition in Elaeis oleifera, interspecific hybrid, and the first pseudo-backcross in North Sumatra, Indonesia.

Indonesian Journal of Oil Palm Research Volume 26 Number 1 Year 2018 is published by presenting articles, Increasing of red palm oil preferences with addition of vegetable oil or flavour and its stability in repeated frying, The growth of oil palm seedling with different plant media and watering Interval, Vegetative and bunch components of first pseudo-backcross of Elaeis Oleifera Brazil and Suriname origin in North Sumatra, Indonesia, Weed management with mixed herbicides (ammonium gluficinate 150 g/ l and methyl metsulfuron 5 g / l) on oil palm TBM, Leaching of N, P, K, and mg from application of briquette compound fertilizer, granular compound fertilizer, and single fertilizer.

Indonesian Journal of Oil Palm Research Volume 25 Number 3 Year 2017 is published by presenting articles, Modelling of monthly oil palm yield pattern based on depth of rainfall and rainy days, Drought and haze effects on oil palm ecophysiology and productivity in South Sumatra, Impacts of water table and soil ameliorant on soil moisture, CO2 emission, and oil palm yield on peat soil, Application of oil palm empty fruit bunch fibers in strength improvement as a fiber reinforced concrete, Smallholders' and cooperatives' readiness analysis in oil palm smallhoders' plantation replanting program (Case Study of Farmers in Ophir, West Pasaman Regency, West Sumatra Province).

Indonesian Journal of Oil Palm Research Volume 25 Number 2 Year 2017 is published by presenting articles, Characterization of oil during fruit ripening of oil palm (Elaeis guineensis Jacq) variety DxP Simalungun, Assesment of water table model on oil palm area in a hilly land, Analysis of macronutriens contents in soil with Near Infra Red (NIR) spectroscopy, Optimization of technical analysis in the palm oil marketing strategy: daily pricing model for 30 days transaction, Export competitiveness of Indonesia's palm oil.

Indonesian Journal of Oil Palm Research Volume 25 Number 1 Year 2017 is published by presenting articles Genetic variability in fatty acid and beta carotene content of 24 accessions Cameroon germplasm of IOPRI collection, Genetic map construction of IOPRI's oil palm (Elaeis guineensis Jacq.) mapping population derived from SP540T by using Restriction site Associated DNA (RAD) markers, Legitimacy of Progenies using SSR Markers as Controlling System and Earlier Selection in the Oil Palm Nursery (Elaeis guineensis Jacq.), Production of oil palm sex inflorescense and its response on the treatment of plant exogenous hormone treatment under drought condition, The effectiveness of fungicides against fungal isolates carried by oil palm seeds.

Indonesian Journal of Oil Palm Research Volume 24 No. 3 of 2016 is published by presenting articles Genetic traceability of oil palm progenies (Elaeis guineensis Jacq.) using simple sequence repeat (SSR), The role of NAA, GA3, activated charcoal, and sucrose on zygotic embryos culture of Hybrid OG open pollinated clone (Elaeis guineensis Jacq. X Elaeis Oleifera), Characterization of gene β Ketoacyl-ACP Synthase II (KAS II) on Elaeis guineensis, Elaeis oleifera, and interspecific hybrid, Worldview-2 imagery vegetation index calculation for oil palm yield estimation, and Retention of carotene and retinyl palmitate in palm cooking oil and the products fried in the oil.

Indonesian Journal of Oil Palm Research Volume 24 Number 2 Year 2016 is published by presenting articles Suspected symptoms of deep-seated depression and homozygosity levels of self-pollinated palm oil population generation 4 SP540T and 5th generation Dura Deli, (Elaeis guineensis Jacq.) of eight varieties of PPKS, Optimization of DNA extraction protocol Elaeidobius kamerunicus, Relation of rainfall patterns and oil palm plant performance on Sumatra Island and Kalimantan during El Niño 2015, Development of utilization of avocado seed extract (Persea americana Mill .) to decrease the content of free fatty acids (ALB) in crude palm oil.

Indonesian Journal of Oil Palm Research Volume 24 Number 1 Year 2016 is published by presenting articles Fatty acid compositions and IOD oil numbers from nine varieties of commercial palm oil DxP in PPKS, genetic diversity of E. oleifera population and population E. guineensis x E. oleifera in germplasm collection PPKS, Distribution of oil palm plantation and soil physical properties on planting hole size and different palm empty fruit bunch application, Improved properties and prevention of peat soil hydrophobicity in oil palm plantations through application of slag, Progression of Elaeidobius kamerunicus faust post-introduction and increased fruit set of set of oil palm in Seram Island, Maluku, Indonesia.