ARTICLE IN PRESS

PREDICTION OF OIL PALM YIELD USING MACHINE LEARNING: COMPARISON OF LINEAR AND NON-LINEAR ALGORITHMS WITH MULTIVARIATE TIME SERIES DATA


DOI: https://doi.org/10.21894/jopr.2025.0044  |   Published Online: 20 August 2025
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ARTICLE IN PRESS

PREDICTION OF OIL PALM BUNCHES PRODUCTION USING ARTIFICIAL NEURAL NETWORK


DOI: https://doi.org/10.21894/jopr.2025.0041  |   Published Online: 13 August 2025
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ARTICLE IN PRESS

BIOGENIC SILICA FROM OIL PALM BIOMASS: A REVIEW ON THE POTENTIAL, EXTRACTION METHODS AND PROPERTIES


DOI: https://doi.org/10.21894/jopr.2025.0036  |   Published Online: 22 July 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 262-271

In Planta EFFICACY OF LOCAL Trichoderma ISOLATES AND SELECTED COMMERCIAL BIOLOGICAL AGENTS AGAINST Ganoderma boninense IN OIL PALM


DOI: https://doi.org/10.21894/jopr.2025.0007  |   Published Online: 19 February 2025
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ARTICLE IN PRESS

OPTIMISATION OF BOMBARDMENT PARAMETERS IN OIL PALM EMBRYOGENIC CALLI BASED ON TRANSIENT EXPRESSION OF RFP GENE


DOI: https://doi.org/10.21894/jopr.2025.0024  |   Published Online: 11 April 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 326-337

STUDY OF THE ANATOMICAL STRUCTURE ALONG THE OIL PALM FRUIT BUNCH STALK AND ITS IMPACT ON CUTTING PRESSURE


DOI: https://doi.org/10.21894/jopr.2025.0022  |   Published Online: 28 March 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 53-64

GENETIC DIVERSITY OF MPOB-ZAIRE OIL PALM (Elaeis guineensis Jacq.) GERMPLASM POPULATION BY MULTIVARIATE ANALYSIS


DOI: https://doi.org/10.21894/jopr.2024.0050  |   Published Online: 8 November 2024
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 65-77

ANTIFUNGAL ACTIVITY OF ETHANOLIC EXTRACT FROM INDIGENOUS BACTERIUM Bacillus subtilis STRAIN MN704394.1 CULTURE CONTAINING EICOSANE AND ETHYL STEARATE AGAINST Ganoderma boninense


DOI: https://doi.org/10.21894/jopr.2024.0058  |   Published Online: 20 December 2024
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 88-98

EVALUATION OF DIFFERENT SEED DORMANCY BREAKING METHODS INCLUDING ENZYMATIC ASSAYS FOR GERMINATION IMPROVEMENT IN OIL PALM (Elaeis guineensis Jacq.)


DOI: https://doi.org/10.21894/jopr.2025.0011  |   Published Online: 3 March 2025
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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


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. 338-346

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


DOI: https://doi.org/10.21894/jopr.2024.0022  |   Published Online: 18 March 2024
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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


DOI: https://doi.org/10.21894/jopr.2023.0064  |   Published Online: 26 December 2023
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RESEARCH ARTICLE
Vol. 36 (3) September 2024, p. 367-379

THE INFLUENCE OF FLOWERING BENEFICIAL PLANT, Turnera subulata ON THE INSECT NATURAL ENEMIES’ ABUNDANCE IN RELATION TO OIL PALM BAGWORM OCCURRENCE IN BAGAN DATUK, PERAK, MALAYSIA


DOI: https://doi.org/10.21894/jopr.2023.0017  |   Published Online: 13 April 2023
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RESEARCH ARTICLE
Vol. 36 (2) June 2024, p. 201-209

EFFECTS OF CULTURE MEDIUM AND LIGHT DURATIONS ON THE FUNGAL GROWTH OF Bipolaris sorokiniana


DOI: https://doi.org/10.21894/jopr.2023.0010  |   Published Online: 9 March 2023
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RESEARCH ARTICLE
Vol. 35 (4) December 2023, p. 582-595

PHENOTYPIC VARIABILITY OF Elaeis oleifera GERMPLASM REVEALED BY PRINCIPAL COMPONENT AND CLUSTER ANALYSES


DOI: https://doi.org/10.21894/jopr.2022.0054  |   Published Online: 6 September 2022
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SHORT COMMUNICATION
Vol. 36 (2) June 2024, p. 335-348

ASSESSMENT OF SUBTERRANEAN TERMITE, Coptotermes curvignathus (ISOPTERA: RHINOTERMITIDAE) INFESTATION SEVERITY INDEX (TISI) AND WATER TABLE ON A PEAT OIL PALM PLANTATION IN SARAWAK


DOI: https://doi.org/10.21894/jopr.2023.0044  |   Published Online: 8 September 2023
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RESEARCH ARTICLE
Vol. 36 (1) March 2024, p. p. 75-81

AN EXPERIMENTAL STUDY ON THE EFFICIENCY OF A PALM MESOCARP SEPARATION MACHINE


DOI: https://doi.org/10.21894/jopr.2023.0008  |   Published Online: 6 March 2023
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RESEARCH ARTICLE
Vol. 36 (1) March 2024, p. p. 94-103

OIL PALM (Elaeis guineensis) SEED CHARACTERISTICS AND GERMINATION POTENTIAL AS INFLUENCED BY MATURITY STAGE AND FRUITLET POSITION ON A BUNCH


DOI: https://doi.org/10.21894/jopr.2023.0014  |   Published Online: 20 March 2023
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RESEARCH ARTICLE
Vol. 35 (4) December 2023, p. 607-615

DYNAMICS OF SUCROSE PHOSPHATE SYNTHASE AND FRUCTOSE BISPHOSPHATE SYNTHASE IN OIL PALMS FERTILISED WITH LOW NITROGEN [(NH2)2CO] DOSE WITH NPPTNBPT COATING IN RED-YELLOW PODZOLIC SOIL


DOI: https://doi.org/10.21894/jopr.2022.0074  |   Published Online: 21 November 2022
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REVIEW ARTICLE
Vol. 35 (3) September 2023, p. 391-405

OIL PALM WATER REQUIREMENT AND THE NEED FOR IRRIGATION IN DRY MALAYSIAN AREAS


DOI: https://doi.org/10.21894/jopr.2022.0052  |   Published Online: 24 August 2022
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RESEARCH ARTICLE
Vol. 35 (3) September 2023, p. 456-466

INTEGRATED MICROWAVE-STEAM STERILISATION OF LOOSE OIL PALM FRUITS: ENHANCED HEATING UNIFORMITY, CRUDE PALM OIL QUALITY AND ENERGY SAVINGS


DOI: https://doi.org/10.21894/jopr.2022.0060  |   Published Online: 22 September 2022
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RESEARCH ARTICLE
Vol. 35 (2) June 2023, p. 330-339

SUSTAINING BEEHIVE-FENCE TO REDUCE ELEPHANT ENCROACHMENT IN OIL PALM PLANTATION


DOI: https://doi.org/10.21894/jopr.2022.0050  |   Published Online: 23 August 2022
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RESEARCH ARTICLE
Vol. 35 (1) March 2023, p. 121-132

COMPARISON OF REAL-TIME PCR, CONVENTIONAL PCR AND RT-LAMP FOR THE DETECTION OF COCONUT CADANG-CADANG VIROID VARIANT IN OIL PALM


DOI: https://doi.org/10.21894/jopr.2022.0030  |   Published Online: 2 June 2022
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RESEARCH ARTICLE
Vol. 35 (1) March 2023, p. 133-146

DESIGNING gRNAs TARGETING OIL PALM PHYTOENE DESATURASE (EgPDS) GENE AND CONSTRUCTION OF VECTORS FOR OIL PALM CRISPR/CAS9 STUDY


DOI: https://doi.org/10.21894/jopr.2022.0032  |   Published Online: 10 June 2022
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SHORT COMMUNICATION
Vol. 35 (2) June 2023, p. 376-384

CROSS-VALIDATION AND RECEIVER OPERATING CHARACTERISTIC ANALYSES FOR OIL PALM LEAF METABOLOME DATASET


DOI: https://doi.org/10.21894/jopr.2022.0046  |   Published Online: 8 August 2022
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RESEARCH ARTICLE
Vol. 35 (1) March 2023, p. 168-184

TRANSPIRATION OF OIL PALM (Elaeis guineensis Jacq.) BASED ON SAP FLOW MEASUREMENT: THE RELATION TO SOIL AND CLIMATE VARIABLES


DOI: https://doi.org/10.21894/jopr.2022.0035  |   Published Online: 29 June 2022
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REVIEW ARTICLE
Vol. 34 (2) June 2022, p. 219-233

AN OVERVIEW OF THE DEVELOPMENT OF THE OIL PALM INDUSTRY AND IMPACT OF THE SHELL GENE INNOVATION AS A QUALITY CONTROL TOOL TO IMPROVE PRODUCTIVITY


DOI: https://doi.org/10.21894/jopr.2021.0001  |   Published Online: 7 January 2021
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RESEARCH ARTICLE
Vol. 7 No. 1, June 1995, p. 18-34

LIFE HISTORY AND FEEDING BEHAVIOUR OF THE OIL PALM BAGWORM, METISA PLANA WALKER


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RESEARCH ARTICLE
Vol. 8 No. 1, December 1996, p. Oct-19

HISTOPATHOLOGY OF Metisa plana (LEPIDOPTERA: PSYCHIDAE) INFECTED WITH Beauveria bassiana DEUTEROMYCOTINA: HYPHOMYCETES)


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RESEARCH ARTICLE
Vol. 8 No. 2, December 1996, p. 64-74

PARASITOIDS AND PREDATORS OF INSECTS ASSOCIATED WITH OIL PALM (Elaeis guineensis Jacq.) IN INDIA


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RESEARCH ARTICLE
Vol. 8 No. 2, December 1996, p. 83-91

VARIATION OF DIELECTRIC PROPERTIES OF OIL PALM MESOCARP WITH MOISTURE CONTENT AND FRUIT MATURITY AT MICROWAVE FREQUENCIES


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RESEARCH ARTICLE
Vol. 8 No. 2, December 1996, p. 55-63

THE GENETIC IMPROVEMENT OF THE DELI DURA BREEDING POPULATION OF THE OIL PALM Elaeis guineensis JACQ.


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RESEARCH ARTICLE
Vol. 9 No. 1, June 1997,

ROLE AND EFFECTIVENESS OF Elaeidobius kamerunicus, Thrips hawaiiensis AND Pyroderces sp. IN POLLINATION OF MATURE OIL PALM IN PENINSULAR MALAYSIA


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RESEARCH ARTICLE
Vol. 12 No. 2, December 2000, p. 46-54

IDENTIFICATION OF FLOWER SPECIFIC PROTEINS IN THE OIL PALM (Elaeis guineensis) BY TWO-DIMENSIONAL GEL ELECTROPHORESIS


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RESEARCH ARTICLE
Vol. 11 No. 2, December 1999, p. 98-113

THE OIL PALM TRUNK AS A CARBOHYDRATE RESERVE


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RESEARCH ARTICLE
(Special Issue), p. 24-33

BIOCHEMICAL FACTORS THAT CONTROL OIL COMPOSITION IN THE OIL PALM


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RESEARCH ARTICLE
(Special Issue), p. 64-73

ANALYSIS OF THE INHERITANCE OF AFLP MARKERS IN AN INTERSPECIFIC CROSS OF OIL PALM USING THE PSEUDO-TESTCROSS STRATEGY


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RESEARCH ARTICLE
(Special Issue), p. 81-87

ISOLATION OF cDNA CLONE ENCODING AN ACYL-ACYL CARRIER PROTEIN THIOESTERASE FROM THE MESOCARP OF OIL PALM (Elaeis guineensis)


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RESEARCH ARTICLE
Vol. 10 No. 2, December 1998, p. 29-38

BIOLISTIC-MEDIATED DNA DELIVERY AND ISOLATION OF TRANSGENIC OIL PALM (Elaeis guineensis JACQ.) EMBRYOGENIC CALLUS CULTURES


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RESEARCH ARTICLE
Vol. 10 No. 2, December 1998, p. 10-24

FORCE AND ENERGY REQUIREMENTS FOR CUTTING OIL PALM FROND


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RESEARCH ARTICLE
Vol. 22 (2) August 2010, p. 781-795

GENETIC PERFORMANCE OF 40 DELI DURA x AVROS PISIFERA FULL-SIB FAMILIES


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RESEARCH ARTICLE
Vol. 22 (2) August 2010, p. 803-813

FUNCTIONAL ANALYSIS OF OIL PALM PALMITOYL-ACP THIOESTERASE (fatB) GENE VIA DOWN-REGULATION IN A MODEL PLANT: Arabidopsis thaliana


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RESEARCH ARTICLE
Vol. 22 (2) August 2010, p. 796-802

GROWTH EFFECTS BY ARBUSCULAR MYCORRHIZA FUNGI ON OIL PALM (Elaeis guineensis Jacq.) SEEDLINGS


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RESEARCH ARTICLE
Vol. 22 (3) December 2010, p. 869-877

EFFECTS OF N, P AND K FERTILIZERS ON LEAF TRACE ELEMENT LEVELS OF OIL PALM IN SUMATRA


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RESEARCH ARTICLE
Vol. 22 (3) December 2010, p. 823-834

PHOSPHORUS FRACTIONS IN SOIL AMENDED WITH EMPTY FRUIT BUNCHES AND PHOSPHATE FERTILIZER – AN INCUBATION STUDY


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RESEARCH ARTICLE
Vol. 21 (2) December 2009, p. 693-699

EFFICACY OF ENTOMOPATHOGENIC FUNGI, Paecilomyces SPP., IN CONTROLLING THE OIL PALM BAGWORM, Pteroma pendula (JOANNIS)


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RESEARCH ARTICLE
Vol. 21 (1) June 2009, p. 588-601

PLANT CAROTENOIDS: MOLECULAR GENETICS AND REGULATION


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RESEARCH ARTICLE
Vol. 20 December 2008, p. 533-541

GENETIC VARIATION AMONG OIL PALM PARENT GENOTYPES AND THEIR PROGENIES BASED ON MICROSATELLITE MARKERS


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RESEARCH ARTICLE
Vol. 20 December 2008, p. 548-558

CantasTM – A TOOL FOR THE EFFICIENT HARVESTING OF OIL PALM FRESH FRUIT BUNCHES


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RESEARCH ARTICLE
(Special Issue - July 2008), p. 108-117

CAROTENOID PROFILES AND PRELIMINARY INVESTIGATION ON CAROTENOID BIOSYNTHESIS IN THE OIL PALM (Elaeis guineensis) MESOCARP


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RESEARCH ARTICLE
(Special Issue - July 2008), p. 97-107

ISOLATION AND UTILIZATION OF ACETYL-COA CARBOXYLASE FROM OIL PALM (Elaeis guineensis) MESOCARP


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RESEARCH ARTICLE
(Special Issue - July 2008), p. 87-96

GENE DISCOVERY VIA EXPRESSED SEQUENCE TAGS FROM THE OIL PALM (Elaeis guineensis Jacq.) MESOCARP


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RESEARCH ARTICLE
(Special Issue - July 2008), p. 77-86

TRANSFORMATION OF PHB AND PHBV GENES DRIVEN BY MAIZE UBIQUITIN PROMOTER INTO OIL PALM FOR THE PRODUCTION OF BIODEGRADABLE PLASTICS


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RESEARCH ARTICLE
(Special Issue - July 2008), p. 118-133

ACTIVITY STUDIES, GENE CHARACTERIZATION AND MANIPULATION OF β-KETOTHIOLASE OF OIL PALM (Elaeis guineensis Jacq.) MESOCARP


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RESEARCH ARTICLE
(Special Issue - April 2008), p. 51-63

IDENTIFICATION OF GENES EXPRESSED IN THE EMBYRYOID TISSUE OF OIL PALM (Elaeis guineensis JACQ.) TISSUE CULTURE via EXPRESSED SEQUENCE TAG ANALYSIS


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RESEARCH ARTICLE
(Special Issue - April 2008), p. 23-34

EFFECT OF AGITATION AND AERATION ON YIELD OPTIMIZATION OF OIL PALM SUSPENSION CULTURE


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RESEARCH ARTICLE
Vol. 20 June 2008, p. 495-507

FACTORS AFFECTING GREEN FLUORESCENCE PROTEIN (GFP) GENE EXPRESSION IN OIL PALM AFTER MICROPROJECTILE BOMBARDMENT


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RESEARCH ARTICLE
Vol. 20 June 2008, p. 470-483

EFFICACY OF SINGLE AND MIXED TREATMENTS OF Trichoderma harzianum AS BIOCONTROL AGENTS OF Ganoderma BASAL STEM ROT IN OIL PALM


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RESEARCH ARTICLE
Vol. 19 (2) December 2007, p. 398-415

PREDICTING SOIL WATER STATUS, EVAPOTRANSPIRATION, GROWTH AND YIELD OF YOUNG OIL PALM IN A SEASONALLY DRY REGION OF MALAYSIA


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RESEARCH ARTICLE
Vol. 19 (2) December 2007, p. 381-392

FLANKING AFLP MARKERS FOR THE VIRESCENS TRAIT IN OIL PALM


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RESEARCH ARTICLE
Vol. 19 (1) June 2007, p. 364-372

SHORT-TERM RESPONSES OF OIL PALM TO AN INTERRUPTED DRY SEASON IN NORTH KEDAH, MALAYSIA


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RESEARCH ARTICLE
(Special Issue - April 2006), p. 1-23

THE NEED TO REDUCE NATIONAL GREENHOUSE GASES EMISSIONS: OIL PALM INDUSTRY’S ROLE


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RESEARCH ARTICLE
(Special Issue - April 2006), p. 24-36

CHARACTERIZATION OF PARAMETERS FOR THE DEVELOPMENT OF AN EARLY SCREENING TEST FOR BASAL STEM ROT TOLERENCE IN OIL PALM PROGENIES


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RESEARCH ARTICLE
(Special Issue - April 2006), p. 37-49

RESEARCH IN THE COMMERCIALIZATION OF METARHIZIUM ANISOPLIAE (HYPHOMYCETES) FOR BIOCONTROL OF THE RHINOEROS BEETLE, ORYCTES RHINOCEROS (SCARABAEIDAE), IN OIL PALM


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RESEARCH ARTICLE
(Special Issue - April 2006), p. 87-98

DEVELOPMENTS TOWARD THE APPLICATION OF DNA CHIP TECHNOLOGY IN OIL PALM TISSUE CULTURE


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RESEARCH ARTICLE
(Special Issue - April 2006), p. 122-143

ECOLOGICAL OBSERVATIONS ON DIURNAL BIRDS IN INDONESIAN OIL PALM PLANTATIONS


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