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Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Published by Universitas Lampung
ISSN : 2302 559X     EISSN : 2549 0818     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
Jurnal Teknik Pertanian Lampung or Journal of Agricultural Engineering (JTEP-L) is a peer-reviewed open-access journal. The journal invites scientists and engineers throughout the world to exchange and disseminate theoretical and practice-oriented researches in the whole aspect of Agricultural Enginering including but not limited to Agricultural Mechanization, Irrigation, Soil and Water Engineering, Postharvest Technology, Renewable Energy, Farm Structure, and related fields. The first issue was published in October 2012 by Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. Jurnal Teknik Pertanian Lampung has ISSN number 2302 - 559X for print edition on October 10, 2012 then 2549 - 0818 for online edition on January 10, 2017. Jurnal Teknik Pertanian Lampung is issued periodically four times a year in March, June, September, and December. Jurnal Teknik Pertanian Lampung has been indexed by Google Scholar, Crossref, Directory Open Access Journals (DOAJ), and CABI. Since Volume 5 Issue 1 (2016) Jurnal Teknik Pertanian Lampung has been accredited as SINTA 3 by Directorate General of Higher Education (DIKTI). Starting Volume 10 Issue 3 (2021) the journal received accreditation SINTA 2.
Arjuna Subject : -
Articles 1,077 Documents
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Design of Fruit Fly Trap ApelB Using a Microcontroller and Sensor System Powered by Solar Photovoltaic Alatas, Masrur; Arifin, Mohammad Syamsul; Ridlo, Dimas Taufiq; Styana, Ucik Ika Fenti
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2194-2205

Abstract

Indonesia’s vast horticultural land faces serious threats from Bactrocera fruit fly infestations, a type of fruit fly in the Tephritidae family that causes rotting plants, reducing the quality of plantation and agricultural products, and even crop failure. The purpose of this study was to design a fruit fly (Bactrocera) trap ApelB version 1.1, using the Cockcroft-Walten Circuit, Methyl Eugenol, PIR HC-SR501 sensor, Arduino Uno ATmega328P, powered by electricity from a Solar Power Plant/System (PLTS) with a panel capacity of 10 Wp, Solar Charge Controller 10 A and a 14.8 V 2.5 Ah battery. The ApelB version 1.1 test method on agricultural land for 24 hours used methyl eugenol to attract fruit flies to enter the trap. Electricity from the PLTS functions to eradicate fruit flies that land on the electric net trap. The findings of ApelB version 1.1 successfully attracted, detected through sensors, and eradicated fruit flies with electric shocks. The capture rate was 80% in lab tests, while corn and chili field trials caught an average of 148–150 fruit flies. ApelB version 1.1 can suppress attacks and fruit fly populations, with a PLTS system and energy storage battery. This tool is guaranteed to operate 24 hours automatically.
The Role of Fan Speed and Misting for Computational Fluid Dynamics (CFD) Analysis of Temperature and Humidity Regulation in Greenhouses Putri, Renny Eka; Salwa, Mutiara; Hasan, Ashadi; Putri, Irriwad
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2026-2038

Abstract

Maintaining an optimal climate is essential for plant growth, and greenhouses though controlled often face challenges such as excessive heat. To address this, fan and misting systems are commonly used. This study investigates the role of fan speed and misting in regulating temperature and relative humidity (RH) in a smart greenhouse using Computational Fluid Dynamics (CFD) simulations. In this research, CFD simulations were performed using actual temperature and RH measurements as input data. The scenarios included varying fan speeds (3.4 m/s, 4.5 m/s) and a control condition without a fan, combined with 15-minute misting sessions. The results show that a fan speed of 4.5 m/s with misting is more effective at lowering temperature compared to 3.4 m/s under the same misting conditions. The simulation errors were below 10% across all treatments, indicating the model’s reliability. These findings offer valuable insights for optimizing climate control in greenhouses, supporting more efficient and sustainable crop production.
Effect of Ultrafine Bubble Additives on the Properties of B-35 Diesel Fuel Asbanu, Husen; Herodian, Sam; Mandang, Tineke; Sugiarto, Anto Tri; Anggarani, Riesta
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2262-2272

Abstract

Improving the quality of B-35 biodiesel fuel is crucial, especially in distillation and flash point parameters that affect performance and safety. The objective of this study was to analyze the effect of oxygen ultrafine bubble application on the fuel characteristics of B-35 including cetane number, viscosity, density, flash point, distillation, and cloud point. Tests were conducted according to ASTM standards: D86 (distillation), D93A (flash point), D613 (cetane number), D445 (viscosity), D4052 (density), and D5773 (cloud point). The treatment was performed by injecting oxygen ultrafine bubble at a rate of 1, 3, and 5 l/min into 1.5 liters of fuel for 10–60 minutes. The results showed the highest distillation temperature of 339.7 °C at 1 l/min and 10 minutes, while the lowest temperature of 330.9 °C was achieved at 5 L/min and 60 minutes (control: 341.6 °C). The highest flash point of 72 °C occurred in the low oxygen injection rate and short duration, while the lowest was 64.5 °C in the high rate and long duration. The treatment increased cetane number from 58.6 to 60.8. The decrease in viscosity and density was insignificant but remained within standard limits. The cloud point decreased from 7.1 °C to 5 °C. UFB oxygen addition shows significant potential in improving the quality and combustion efficiency of B-35 fuel
Effect of Indole Butyric Acid (IBA) Application and Spliced Grafting on the Growth of Garuda Clone Cassava Triana, Menis; Yusnita, Yusnita; Utomo, Setyo Dwi; Hapsoro, Dwi; Yelli, Fitri
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2046-2056

Abstract

Increasing cassava production is required to maintain supply sustainability and meet seed demand. The use of splice grafting and the application of auxin IBA are expected to accelerate rooting and enhance the productivity of cassava. The objective of this research is to study the effect of IBA application on the growth of cuttings and grafted seedlings of cassava. The research was conducted from October 2024 to February 2025 at the Integrated Field Laboratory of the Faculty of Agriculture, University of Lampung, Natar District, South Lampung. The experiment was designed according to randomized block design (RBD) with factorial treatments arrangement (3×2). The first factor was IBA concentration consisted of three levels, namely without IBA (A0), 1000 ppm (A1), and 2000 ppm IBA (A2). The second factor consisted of 2 types of plant materials, namely cuttings seedlings (B1) and slanted graft seedlings (B2). The results show that the application of IBA significantly increases the growth and production of cassava compared to without IBA application. IBA at 2000 ppm is the best concentration for the observed variables. The use of planting materials, whether cuttings or slanted grafts, both enhance the yield of cassava.
Biopesticides and Refugia Implementation Increasing the Population and Diversity of Natural Enemies in Rice Fields based on Ecology Kurniawan, Muhammad Izza; Kusuma, Ramadhani Mahendra; Wiyatiningsih, Sri
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2250-2261

Abstract

The diversity of natural enemies of insects is influenced by the availability of microhabitats and food sources, which can be increased through the use of refugia. Intensive use of pesticides in conventional agricultural systems has resulted in a decline in the diversity of natural enemies that play an important role in biological control of pests. This study aims to identify the types, roles, and populations of natural enemies of pests and determine the level of natural enemy diversity including the species diversity index, species evenness, species richness, and dominance in rice fields using integrated and conventional farming systems. Data collection methods were carried out through a combination of direct observation, insect nets, yellow traps, light traps, and identification of insect morphospecies using a digital microscope and supporting literature. The identification results showed 7 orders and 21 genera of natural enemies with a total of 4,679 individuals in integrated fields and 2,792 individuals in conventional fields. The species diversity index (H’=2.11), evenness (E’=0.69), species richness (R’=2.37), and dominance (C’=0.18) indicated that the integrated system was more supportive of biodiversity. Ecological engineering through refugia has been shown to increase the population diversity of natural enemies, thereby strengthening biological control in rice ecosystems.
Product Formulation of Ready to Use Fish Food (RUFF) from Snakehead Fish Flour (Channa striata) Giriwono, Puspo Edi; Haryanto, Safira P.A; Saraswati, Saraswati
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2017-2025

Abstract

RUFF (ready-to-use fish food) is a nutrient and calorie-dense food with high protein and energy consumed by children under five years of age who suffer from severe acute malnutrition. RUFF in this study was designed to be the alternative product for RUTF (ready-to-use therapeutic food) using snakehead fish flour as skim milk substitute. This study aims to determine the suitability of snakehead fish flour as an animal protein alternative, obtain the RUFF formula that meets FAO and WHO standards, and determine the consumer acceptance. The research investigated different amount of snakehead fish flour in the RUFF formulation. There were 3 formulas with different snakehead fish flour, i.e. 20% (F1), 22% (F2), and 24% (F3). The results of the analysis showed that the highest protein content was found in formula F3 (14.35 ±0.72)% with moisture content of 2.32 ± 0.06%, ash content of 2.56 ± 0.04%, fat content of 29.39 ± 0.24%, and carbohydrate content of 51.37 ± 0.94%. All three RUFF formulations meet the nutritional standards set by the FAO and WHO. The hedonic rating test results and ranking showed that the most preferred formula by the panelist was formula F1 containing 20% snakehead fish flour with an average rate of 7.46 (like). Formula F1 is the formula of RUFF with the highest rate of consumer acceptance.
Nondestructive Prediction of Oil Palm Fruit Quality During Processing Delays Using Electrical Impedance Spectroscopy Akbar, Arief Al; Budiastra, I Wayan; Irmansyah, Irmansyah
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2171-2178

Abstract

Nondestructive prediction of palm fruit quality is needed to monitor changes in palm fruit quality during processing delays. This study aims to develop a method for predicting the chemical quality of palm fruit during processing delays using the Electrical Impedance Spectroscopy (EIS). The electrical impedance of palm fruit were measured at frequencies of 50 Hz to 1 MHz and followed by the determination of free fatty acid (FFA) and moisture content using chemical methods. The best initial treatment for impedance spectrum data in this study was Standard Normal Variate (SNV) and Baseline. The results of this study indicate that the PLS method outperforms PCR in predicting FFA and moisture content. The best prediction for free fatty acid content was using the SNV pre-treatment and component factor 7 with a value of r = 0.87; SEC = 2.75%; SEP = 2.82%; CV = 23.81%; RPD = 1.94 and consistency of 97.75%. The best prediction for moisture content was obtained using the Baseline initial treatment and component factor 15 with a value of r = 0.97; SEC = 3.65%; SEP = 3.82%; CV = 28.24%; RPD = 1.91 and consistency of 83.24%. The developed electrical impedance and PLS methods can be used to predict free fatty acid content and moisture content of oil palm fruit during processing delays.
Effect of Packaging on Protein Content, pH, and Sensory of Probiotic Tempeh Juice During Cold Storage Sahara, Nur Aini; Aisah, Attika Nur; Kustyawati, Maria Erna; Astuti, Sussi; Satyajaya, Wisnu
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2229-2238

Abstract

Tempeh juice with probiotics is considered as functional probiotic foods with health benefits. This study aimed to evaluate the effect of packaging type (glass bottle and aluminum foil), and cold storage duration on chemical, microbial and sensory properties of probiotic tempeh juice. The research used a two-factorial Randomized Complete Block Design with three replications. ANOVA was used to analyze the data and it was followed by DMRT test at 5% significance level. The results showed that storage duration had no significant effect on viscosity and other chemical analysis, but was significant on sensory attributes of color, aroma, taste, and overall acceptability. Protein decreased on the 8th day probably due to protein hydrolysis by microbial activity, but increased on the 12th day of storage due to the accumulation of microorganism cell walls during storage. However, sensory changes included a paler color, a stronger fermentation aroma, an acidic alcoholic taste, and overall acceptance was acceptable. It was concluded that glass bottle packaging was more effective in maintaining the stability of protein content, pH, and sensory of probiotic tempeh juice beverage compared to the aluminum foil standing pouch with a spout, with the estimated shelf life was 8 days in cold storage.
Logging Safety Practices of Chainsaw Workers in the Indonesian State Forest Concession Syauqi, Ahmad Luthfi; Hermudananto; Septiana, Ratih Madya; Supriyatno, Nunuk
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2316-2326

Abstract

The forestry industry outside Java continues to rely on chainsaw-based logging in natural forests, a technique that involves significant safety risks due to the size of harvested trees, machine hazards, and challenging environmental conditions. These risks highlight the need for skilled operators and effective Occupational Safety and Health (OSH) systems. This study was conducted at two Indonesian State Forest Concessions in East Kalimantan and examined OSH implementation among chainsaw operators. Data were collected through questionnaires with both qualitative and quantitative components, field observations, interviews, and analysis of company documents, including work plans and safety procedures. The results showed that operator awareness of OSH was very high (85.94%), and support and guidance from managers and foremen also strongly influenced compliance (75.97% and 76.81%, respectively). However, barriers remained (49.46%), particularly in the form of incomplete Personal Protective Equipment (PPE), operator discomfort when using certain PPE, and the absence of structured training. These shortcomings indicate a gap between policy and practice. Addressing these issues requires companies not only to provide complete and comfortable PPE but also to enhance training and actively enforce safety protocols. Strengthening these measures would improve both worker safety and the overall sustainability of forest operations.
Economic Feasibility of Embankment Construction with a Polder System for Optimizing Sustainable Palm Oil Cultivation Hermantoro, Hermantoro; Kifli, Fahmi W; Marta, Rolly; Aji, Wandha Atmaka; Nirfrizal, Risca Permatasari
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2069-2079

Abstract

Lowland areas in oil palm plantations is often flooded due to river overflows and high rainfall, which results in reducing oil palm productivity. This research aims to analyze the feasibility of investing in building embankments with a polder system to optimize lowland areas for sustainable oil palm cultivation. The research method uses a quantitative descriptive approach with financial analysis based on NPV, IRR, PP, PI, BCR and BEP parameters. The research results show that the polder system increases land productivity from 60–61% utilization to 100%, with an optimal projection of 136 trees/ha. Even though investment costs increased from IDR 11.8 billion to IDR 14.4 billion, the financial feasibility analysis resulted in a positive NPV of IDR 964,200,861, IRR 22.20% (> 20% ​​discount), PP 10 years, PI 2.17 > 1, BCR 1.21 > 1 and BEP achieved in 10 years. In conclusion, building embankments with a polder system is financially and technically feasible, increasing productivity while reducing the risk of flooding. Recommendations include regular monitoring of the polder system and integration with sustainable cultivation practices

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