Category: 2025

(60 Articles)

REVIEW ARTICLE
Vol. 37 (2) June 2025, p. 187-208

OIL PALM ECONOMIC PERFORMANCE IN MALAYSIA AND R&D PROGRESS IN 2024

GHULAM KADIR AHMAD PARVEEZ1*; RAZMAH GHAZALI1; NUR AIN MOHD HASSAN1; AHMAD ZAIRUN MADIHAH1; ABRIZAH OTHMAN1; PARTHIBAN KANNAN1; TEH SOEK SIN1; VOON PHOOI TEE1; ZAINAB IDRIS1 and RAMLE MOSLIM1
DOI: https://doi.org/10.21894/jopr.2025.0031  |   Published Online: 13 June 2025
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 741-750

DIETARY INCLUSION OF CRUDE PALM OIL, RED PALM OIL, REFINED PALM OIL, PALM KERNEL OIL AND SOYBEAN OIL ON MODULATION OF INTESTINAL BARRIER INTEGRITY AND IMMUNITY IN LAYING HENS

WAN IBRAHIM IZUDDIN1; TECK CHWEN LOH1,2*; NAZRI NAYAN1,2; HOOI LING FOO3,4 and HENNY AKIT1,4
DOI: https://doi.org/10.21894/jopr.2025.0014  |   Published Online: 7 March 2025
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 719-728

INSIGHT INTO FATTY ACID-AMINO ACIDS INTERACTIONS IN LIPASE ENZYME CATALYSIS OF TRANSESTERIFICATION REACTION OF PALM OIL USING DENSITY FUNCTIONAL THEORY B3LYP 6-31G(D,P)

RADIAH ALI1; ALYZA AZZURA AZMI1 and SABIQAH TUAN ANUAR1*
DOI: https://doi.org/10.21894/jopr.2024.0056  |   Published Online: 27 November 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 646-657

MULTIDIMENSIONAL ANALYSIS SUSTAINABILITY OF CORN-SOYBEAN INTERCROPPING MODEL IN SMALLHOLDER OIL PALM REPLANTING

SRI AMBAR KUSUMAWATI1; AGUSTINUS N KAIRUPAN2*; RACHMIWATI YUSUF3; NURHAYATI4; IDA NUR ISTINA5; F FATHURRAHMAN5; HERY WIDYANTO6; PARLIN HALOMOAN SINAGA3; TENGKU HARUNUR RASYID7 and MEVIE LINTANG8
DOI: https://doi.org/10.21894/jopr.2024.0055  |   Published Online: 27 November 2024
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SHORT COMMUNICATION
Vol. 37 (2) June 2025, p. 370-376

THE FIRST RECORD OF THE WHITE-THROATED KINGFISHER, Halcyon smyrnensis, BREEDING IN BORNEO, INDONESIA

MUHAMMAD SILMI1; MAHFUD HUDA1; ALI AMRAN1; SURYADI1; MISLAN1; FILA ISTINA MACHID1; ALDINO FAUZIL FANANI1; AGUSTINA KRISTIN HANDAYANI1 and CARL TRAEHOLT2*
DOI: https://doi.org/10.21894/jopr.2024.0052  |   Published Online: 19 November 2024
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SHORT COMMUNICATION
Vol. 37 (4) December 2025, p. 751-756

MOLECULAR IDENTIFICATION OF A MEALYBUG SPECIES (HEMIPTERA: PSEUDOCOCCIDAE) INFESTING AN OIL PALM PLANTATION IN TAWAU, SABAH

NURHAFIZHOH ZAINUDDIN1*; MUHAMMAD NURUL YAQIN SYARIF1; SHAMSILAWANI AHAMED BAKERI1; ZAHIDAH AYOB1 and MOHAMED MAZMIRA MOHD MASRI1
DOI: https://doi.org/10.21894/jopr.2024.0051  |   Published Online: 8 November 2024
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REVIEW ARTICLE
Vol. 37 (4) December 2025, p. 581-597

PREVALENCE OF WORK-RELATED MUSCULOSKELETAL DISORDERS (WMSDs) AND RECENT INITIATIVES TO ADDRESS THEM IN THE OIL PALM INDUSTRY: A SYSTEMATIC REVIEW

‘UMAR MOHAMAD NOOR1 and MOHAMAD IKHWAN ZAINI RIDZWAN1*
DOI: https://doi.org/10.21894/jopr.2024.0048  |   Published Online: 17 October 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 696-706

ENCAPSULATED ACIDIC ASPIRIN-BASED EUTECTIC SOLVENTS FOR ESTERIFICATION OF FREE FATTY ACID

ADEEB HAYYAN1,2*; JIAN LING LEONG1; ANDREW T H YEOW1,2; HANEE F. HIZADDIN1,2; YOUSEF MOHAMMED ALANAZI3; JEHAD SALEH3; BARUN KUMAR CHAKRABARTI4; CHEE TONG JOHN LOW5 and SHARIFAH SHAHIRA SYED PUTRA1
DOI: https://doi.org/10.21894/jopr.2024.0047  |   Published Online: 30 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 627-634

LIFE CYCLE, FOLIAR CONSUMPTION RATE, NATURAL ENEMIES AND POPULATION FLUCTUATION OF Phobetron hipparchia CRAMER, 1777 (LEPIDOPTERA: LIMACODIDAE): AN EMERGING PEST OF OIL PALM IN COLOMBIA

CARLOS ENRIQUE BARRIOS-TRILLERAS1; ROBERTO JOSÉ DIAZ-CASTRO1; LEIDY JOHANNA CONTRERAS-ARIAS1 and ANUAR MORALES-RODRÍGUEZ1*
DOI: https://doi.org/10.21894/jopr.2024.0046  |   Published Online: 20 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 684-695

A BIOMECHANICAL ANALYSIS ON WORKRELATED MUSCULOSKELETAL DISORDERS USING A MECHANISED CHAINSAW FOR OIL PALM HARVESTING

UMESH GANESH1; ZAIDI MOHD RIPIN1; WAN MOHD AMRI WAN MAMAT ALI1; YEO YING HENG1; MITCHELLE LAW JYY JINN1; JEEVINTHIRAN KARUNAGARAN1 and MOHAMAD IKHWAN ZAINI RIDZWAN1*
DOI: https://doi.org/10.21894/jopr.2024.0045  |   Published Online: 19 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 707-718

INVESTIGATION ON MECHANICAL AND CORROSION CHARACTERISTICS OF ASME SA 516 GRADE 70 CARBON STEEL USED IN A BIODIESEL STORAGE FACILITY

NUR NAQIUDDIN MDD NORDIN1*; MOHD NASHRUL MOHD ZUBIR1*; SALIM NEWAZ KAZI1 and NURIN WAHIDAH MOHD ZULKIFLI1
DOI: https://doi.org/10.21894/jopr.2024.0044  |   Published Online: 9 September 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 476-491

A COMPREHENSIVE ASSESSMENT OF COMPOSITION AND NUTRIENT CONTENT IN VARIOUS COMMERCIAL FERTILISERS USED IN INDONESIAN OIL PALM PLANTATIONS

SUKARMAN1,2; LILIK SUTIARSO1*; ANDRI PRIMA NUGROHO1; ARDAN WIRATMOKO1; TAKASHI OKAYASU3; SUWARDI1,4; SEPTA PRIMANANDA5; AHMAD HASANUDDIN4 and HERRY WIRIANATA5
DOI: https://doi.org/10.21894/jopr.2024.0043  |   Published Online: 5 September 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 519-532

SULPHONIC ACIDS SUPPORTED ON Fe3O4/PVA MAGNETIC COMPOSITE AS CATALYSTS FOR ESTERIFICATION OF FREE FATTY ACIDS

ANDREW T. H. YEOW1,2; ADEEB HAYYAN1,2*; MOHD USMAN MOHD JUNAIDI1,2; MUNEER M. BA-ABBAD3 and MOHD ALI HASHIM1
DOI: https://doi.org/10.21894/jopr.2024.0042  |   Published Online: 4 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 670-683

SEPARATION AND THERMAL MODIFICATION OF MONTMORILLONITE FROM TANAH DATAR CLAY AND ITS CATALYTIC APPLICATION IN BIODIESEL PRODUCTION FROM WASTE FRYING OILS

ZARNIDA WIDIA NENGSIH1; RAHAYU RAHAYU1; SYUKRI ARIEF1; UPITA SEPTIANI1; MATLAL FAJRI ALIF1 and SYUKRI SYUKRI1*
DOI: https://doi.org/10.21894/jopr.2024.0041  |   Published Online: 2 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 635-645

GENOME SURVEY AND PRELIMINARY GENOMIC CHARACTERISATION OF A KEY OIL PALM POLLINATOR, Elaeidobius kamerunicus

NABEEL ATA1; MOHD AMIN AB HALIM1; MUHAMMAD NURUL YAQIN SYARIF1; SAHARUL ABILLAH MOHAMAD1; MUHAMMAD DZULHELMI MUHAMMAD NASIR2; SIEW-ENG OOI1 and MEILINA ONG-ABDULLAH1*
DOI: https://doi.org/10.21894/jopr.2024.0039  |   Published Online: 21 August 2024
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REVIEW ARTICLE
Vol. 37 (4) December 2025, p. 598-616

GREENING THE PALM OIL INDUSTRY: PROSPECTS AND BARRIERS OF SUPERCRITICAL CO2 EXTRACTION

DWILA NUR RIZKIYAH1; NICKY RAHMANA PUTRA1,2; LAILATUL QOMARIYAH3*; MOHD AZIZI CHE YUNUS1; HASMADI MAMAT4,5; AHMAD HAZIM ABDUL AZIZ4,5; JUMAKIR JUMAKIR6; WALUYO WALUYO6 and SUPARWOTO SUPARWOTO6
DOI: https://doi.org/10.21894/jopr.2024.0038  |   Published Online: 3 July 2024
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REVIEW ARTICLE
Vol. 37 (3) September 2025, p. 397-420

ENHANCING CORROSION RESISTANCE IN BIODIESEL DISTRIBUTION AND TERMINAL OPERATIONS: A COMPREHENSIVE MATERIALS COMPATIBILITY REVIEW

NUR NAQIUDDIN MDD NORDIN1 *; MOHD NASHRUL MOHD ZUBIR1 *; SALIM NEWAZ KAZI1 and NURIN WAHIDAH MOHD ZULKIFLI1
DOI: https://doi.org/10.21894/jopr.2024.0033  |   Published Online: 27 May 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 617-626

EFFECT OF PLANTING DENSITY, PROGENY LINEAGE AND NITROGEN FERTILISER ON OIL PALM PERFORMANCE ON ALLUVIAL SOIL

AFANDI, A M1; NORLIYANA, Z Z1*; NORDIANA, A A1; MARHALIL, M1; MEILINA, O A1; FARAWAHIDA, M D1 and HALIMATUL, S A1
DOI: https://doi.org/10.21894/jopr.2024.0031  |   Published Online: 14 May 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 506-518

EVALUATING THE EFFECT OF LOW AND HIGH TEMPERATURE MODE OF SUBCRITICAL WATER PRE-TREATED EMPTY FRUIT BUNCHES ON CO-DIGESTION PERFORMANCE AND KINETIC STUDY FOR METHANE PRODUCTION

ADILA FAZLIYANA AILI HAMZAH1; MUHAMMAD HAZWAN HAMZAH1,2*; KHAIRUDIN NURULHUDA1,2; HASFALINA CHE MAN1,2; MUHAMMAD HEIKAL ISMAIL3 and PAU LOKE SHOW4,5,6,7
DOI: https://doi.org/10.21894/jopr.2024.0030  |   Published Online: 8 May 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 263-273

ASSESSMENT OF PARASITIC NEMATODES Elaeolenchus parthenonema POINAR, ON POLLINATING WEEVIL, Elaeidobius kamerunicus AT SELECTED OIL PALM PLANTATIONS IN PAHANG, MALAYSIA

NUR FARAH EZZATY1,2; SITI NURULHIDAYAH AHMAD3; IZFA RIZA HAZMI2; MOHAMED MAZMIRA MOHD MASRI3 and JOHARI JALINAS1,2*
DOI: https://doi.org/10.21894/jopr.2024.0027  |   Published Online: 4 April 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 274-287

ASSESSING THE PRODUCTIVITY, ECONOMIC AND SUSTAINABILITY IMPACTS OF SHELL DNA TESTING IN INDONESIAN OIL PALM SMALLHOLDINGS IN MUSI BANYUASIN AND PELALAWAN REGENCIES

ISMAIL MASKROMO1; JEANETTE KUMAUNANG1; KRISTIANTO NUGROHO1; A MUIS HASIBUAN2; RERENSTRADIKA TIZAR TERRYANA3; SYAFARUDDIN4; ENGELBERT MANAROINSONG4; MUHAMMAD A BUDIMAN5; ABDUL R PURBA5; NATHAN D LAKEY6; JARED M ORDWAY6 and PUJI LESTARI1*
DOI: https://doi.org/10.21894/jopr.2024.0024  |   Published Online: 22 March 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 338-346

GROWTH CHARACTERISTICS AND SUSTAINABILITY INDEX AT DIFFERENT DEVELOPMENT STAGES OF IMMATURE OIL PALM UNDER MONO- AND INTERCROPPING SYSTEMS

CUCU SUHERMAN1*; YUDITHIA MAXISELLY1; ANNE NURAINI1; MOCHAMAD ARIEF SOLEH1 and HARIS MAULANA1,2
DOI: https://doi.org/10.21894/jopr.2024.0022  |   Published Online: 18 March 2024
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REVIEW ARTICLE
Vol. 37 (1) March 2025, p. 16-43

LIGNOCELLULOSIC BIOMASS-DERIVED BIOGAS: A REVIEW ON SUSTAINABLE ENERGY IN MALAYSIA

IZZAH FARHANA AB AZIZ1; HASFALINA CHE MAN1,2,3*; ALI DEMIRCI4; MUHAMMAD HAZWAN HAMZAH1,2; ROZITA OMAR5; NUR SYAKINA JAMALI5; KAMIL KAYODE KATIBI6,7 and ABDULSALAM MOHAMMED3,8
DOI: https://doi.org/10.21894/jopr.2024.0021  |   Published Online: 18 March 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 492-505

DELIGNIFICATION METHODS FOR EMPTY FRUIT BUNCH CO-SUBSTRATE IN POME ANAEROBIC DIGESTION: AN EXPERIMENTAL COMPARATIVE ANALYSIS

MUHAMMAD ALPLEX FIRSTONDA KATON2,4; FRENDY RIAN SAPUTRO1; BAMBANG MUHARTO1; ZULAICHA DWI HASTUTI1; ADE SYAFRINALDY1; ALDRIN SANOVA2; MUHAMMAD ILHAM AKBAR2; AGUS KISMANTO1; RINALDI MEDALI RACHMAN2; NURUL AIYSHAH MAZLAN3; AHMAD MUHSIN ITHNIN3 and DHANI AVIANTO SUGENG1*
DOI: https://doi.org/10.21894/jopr.2024.0016  |   Published Online: 14 February 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 324-337

AN INVESTIGATION OF 30% PALM BIODIESEL BLEND FUEL (B30) UNDER INDONESIAN OPERATING CONDITIONS

IHWAN HARYONO1; R C NUGROHO1; M T SURYANTORO1; HARI SUMARTONO2; SITI YUBAIDAH1; NACEP SURYANA1; BUDI ROCHMANTO1; DEDY INDRIATMONO1; R T SOEWONO1; MUHAMMAD MA’RUF1; K F ADHI SUKRA2; HENRY NOLANDY1; MOKHTAR3; HERU PRIYANTO2; AGUS WAHIDIN1; ADE KURNIAWAN1; VEBRIYANTI HAYOTO2; SUHERMAN MUKTI1; LUKMAN SALAHUDDIN2; P DIAH RIZKY LESTARI4; HARI SETIAPRAJA1* and IMAN K REKSOWARDOJO5,6
DOI: https://doi.org/10.21894/jopr.2024.0013  |   Published Online: 8 February 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 224-234

APPLICATIONS OF ORGANIC FUNGICIDES, ENDOPHYTIC BACTERIA, BIOFUNGICIDES, AND BIOSTIMULANTS IN CURATIVE CONTROL OF Ganoderma

DEDEN DEWANTARA ERIS1; AGUSTIN SRI MULYATNI1; IRMA KRESNAWATY1; TRI PANJI1; PRIYONO1; LARASATI MARDHIKA1; KUWAT TRIYANA2 and HAPPY WIDIASTUTI1*
DOI: https://doi.org/10.21894/jopr.2024.0012  |   Published Online: 2 February 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 53-63

APPLICATION OF SEAWEED EXTRACTS IN OIL PALM (Elaeis guineensis) SEEDLINGS SUBJECTED TO WATER DEFICIT: PHYSIOLOGICAL, BIOCHEMICAL AND ENZYMATIC RESPONSES

MUHAMMAD DANIAL MOKHTARUDDIN1; NUR AIFAA ABD RAZAK1; AISAMUDDIN ARDI ZAINAL ABIDIN1; NOR IZZATI HUSNA NOORHISHAM2; NUR ASNA FAIQAH JOHARI1 and ZETTY NORHANA BALIA YUSOF1,2,3*
DOI: https://doi.org/10.21894/jopr.2023.0066  |   Published Online: 27 December 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 64-71

In Vitro CULTURAL STUDIES FOR CALLOGENESIS AND EMBRYOGENESIS OF OIL PALM (Elaeis guineensis Jacq.) USING SEEDLING AND SPEAR LEAF EXPLANTS

B KALYANA BABU1*; R K MATHUR1 ; K SURESH1 ; G RAVICHANDRAN1 ; B SUSANTHI1 and S TIWARI1
DOI: https://doi.org/10.21894/jopr.2023.0064  |   Published Online: 26 December 2023
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 347-358

FORMULATION OF FORTIFIED MEDIA CONSISTING OF OIL PALM EMPTY FRUIT BUNCH BIOCOMPOST AND OIL PALM KERNEL SHELL BIOCHAR FOR THE ENHANCEMENT OF BIOACTIVE COMPOUNDS IN Centella asiatica (L.) URBAN

IZZA NADIRA ABU BAKAR1, MOHAMAD FAIZAL IBRAHIM1,2*, MANSOR HAKIMAN2, MOHD AZWAN JENOL1, NAHRUL HAYAWIN ZAINAL3, SURAINI ABD-AZIZ1, SEHANAT PRASONGSUK4
DOI: https://doi.org/10.21894/jopr.2023.0039  |   Published Online: 25 August 2023
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