https://jopr.mpob.gov.my Mon, 26 Jan 2026 08:31:09 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://jopr.mpob.gov.my/impact-of-frond-moisture-content-on-cutting-forces-in-oil-palm-harvesting/ Mon, 26 Jan 2026 08:31:09 +0000 https://jopr.mpob.gov.my/?p=15234 Oil palm frond (OPF) is a major agricultural by-product whose mechanical behaviour controls harvesting operations. This study investigates how moisture content (MC) affects the cutting force and mechanical behaviour of OPF when using a cordless electric reciprocating saw. Optimising the handling of OPF, a major oil palm by-product, is important for improving sustainability and harvesting efficiency. OPF samples were classified into four moisture categories: Fresh (75%–100%), moderately dry (50%–75%), dry (25%–50%), and very dry (0%–25%). Cutting force was measured using a load cell, while mechanical properties were assessed through three-point bending tests and porosity was determined via scanning electron microscopy. Results show that the cutting force and specific cutting force (SCF) decrease significantly as MC increases. The driest samples required the highest cutting effort, while fresher ones were easier to cut. Flexural strength and stiffness increased as moisture decreased, while porosity declined. These findings highlight the importance of moisture in tool performance and support the development of more ergonomic, energy-efficient and automated harvesting solutions.

]]> https://jopr.mpob.gov.my/factors-affecting-development-of-oryctes-rhinoceros-in-some-substrates-commonly-found-in-the-oil-palm-environment/ Sat, 13 Nov 2021 08:13:49 +0000 https://jopr.mpob.gov.my/V2/?p=9099 A laboratory study was conducted to evaluate the factors which affected larval development in four different substrates commonly found in the oil palm replanting environment. The percent survivorship of Oryctes rhinoceros was lowest in raw empty fruit bunches (EFB), followed by coconut trunk (CT) and oil palm trunk (OPT). Processed EFB and oil palm fronds (OPF) were found to be less suitable substrates, as indicated by the incomplete development of the larval stages. There were lower percentage of nitrogen in the OPF (0.45%) and EFB (0.35%), compared to CT (1.98%) and OPT (0.56%) substrates, which could have affected the duration for each developing stage. The higher starch content in OPT compared to raw EFB may also have influenced the development of the larvae. The weights of almost all the developing stages were higher in CT substrate. The second and third larval instars had consumption rates of 2.2 g day^-1 and 4.1 g day^-1 of CT and OPT substrates respectively. Although the consumption rates were higher in OPT, the weight of larvae remained significantly lower (p<0.05) than in CT. There was a significant linear relationship (p<0.001) between the percent moisture content and weight of the third instar larvae, showing water to be an important factor in ensuring weight increase in the larval and subsequently, pupal stages. Moisture content of 77% and above was essential for the complete development of 0. rhinoceros. It is hoped that this information will lead to a modification of the zero burn replanting practice, so as to create less suitable environments for the beetle to breed in, thus avoiding the risk of 0. rhinoceros attack.

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