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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 1,170 Documents
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NIR-Based Predictive Modelling for the Quantification of Sucrose, Glucose, and Fructose in Brown Sugar from Oil Palm Trunk Sap Sharly Claudia Alghai Sani; Dase Hunaefi; Faleh Setia Budi; Yessie Widya Sari; Ilham Akbar Ibrahim; Noviani Rustanto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i1.256-267

Abstract

Using oil palm trunk sap as a raw material for brown sugar is an innovative alternative for local product diversification. However, craftsmen's limited access to laboratory analysis methods is challenging to maintain product quality consistency. This study aims to evaluate the feasibility of using near-infrared spectroscopy (NIRS) combined with chemometric modelling for the estimation of sucrose, glucose, and fructose content in brown sugar derived from oil palm trunk sap. This method combines destructive analysis using high-performance liquid chromatography (HPLC) as a reference with non-destructive NIRS analysis and partial least squares regression (PLSR) modelling. The prediction model performed very well for glucose with an R² of 0.991, while for sucrose it was 0.850 and fructose 0.860. However, the relatively high values of SEC and SEP and the low prediction consistency (<20%) indicate that the current chemometric strategy is not yet fully adequate, suggesting the need for a larger and more process-representative sample set, more rigorous consideration of sample representativeness and laboratory reference uncertainty (SEL), and the inclusion of laboratory reference error (SEL) from HPLC data to enable more robust and reliable model development. These findings indicate that NIRS has potential as a fast and non-destructive method for brown sugar quality control, but further development is needed to make the model more reliable under various production conditions.
Formulation of Ready-to-Use Fish Food Based on Mackerel (Scomberomorus) and Catfish (Clarias gariepinus) Ratna Komala Putri; Dias Indrasti; Puspo Edi Giriwono
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.v14i6.2348-2358

Abstract

This study developed Ready-to-Use Fish Food (RUFF) as a high-energy, high-protein recovery food for children under five with severe acute malnutrition, using mackerel and catfish powders as animal protein sources. Four RUFF variants were formulated with skim milk powder, mackerel powder, catfish powder, and a mixture of both fish powders. Nutritional analysis included moisture, ash, protein, fat, carbohydrates, and energy content, which were compared to Codex Alimentarius (CXG 95-2022) standards. Protein ranged from 2.31 to 4.61 g/100 kcal, fat from 5.64 to 6.25 g/100 kcal, carbohydrates from 6.79 to 9.44 g/100 kcal, and energy from 524 to 550.49 kcal/100 g, meeting FAO/WHO criteria for therapeutic foods. The sensory acceptability was assessed using a hedonic test with toddlers aged 2 to 5 years using a Balanced Incomplete Block Design. Scores ranged from 1 (like), 2 (neutral), and 3 (dislike), analyzed by ANOVA and Tukey’s test. The mixed fish powder variant had the least preference (mean score 2.08, neutral), while catfish, mackerel, and skim milk variants were liked (scores 1.23 to 1.83). Results confirm that these RUFF variants are nutritionally adequate and well accepted, supporting their use as an effective alternative to RUTF for malnourished toddlers.
Liquid Smoke Derived from Sago Processing Solid Waste: Organic Compound Composition and Its Application for Ironwood (Intsia bijuga) Seedlings Herman Siruru; Wilma Nancy Imlabla; Ismail Budiman
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i1.101-109

Abstract

Liquid smoke derived from sago processing solid waste can be utilized in various applications, depending on the raw materials and pyrolysis conditions. This study aimed to identify the chemical compounds present in liquid smoke from sago processing waste and to evaluate their effects on the growth of ironwood (Intsia bijuga) seedlings. Liquid smoke was produced through a slow pyrolysis process with an average temperature increase of 1.5–1.8 °C/min. Gas chromatography–mass spectrometry (GC–MS) analysis was used to determine the chemical composition of the liquid smoke. The liquid smoke was applied to ironwood seedlings using three treatments: without liquid smoke (AC 0), a mixture of liquid smoke and water at a ratio of 1:20 (AC 1), and 1:200 (AC 2). Observations focused on seedling height, stem diameter, and number of leaves. The results showed that liquid smoke from sago processing waste contained various organic compounds, including acids, ketones, phenolics, furans, ethers, and other related compounds, with acetic acid being the dominant component. However, the application of liquid smoke did not significantly affect the growth parameters of ironwood seedlings.
The Effect of Fertilization Combination and Paclobutrazol Concentrations on the Productivity of Rice Plants (Oryza sativa L.) Fitrianti Rahmawati; Agus Sulistyono; Pangesti Nugrahani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 2 (2026): April 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i2.478-486

Abstract

Rice (Oryza sativa L.) is a key agricultural commodity and represents the primary carbohydrate source for the Indonesian population. Despite its importance, national rice productivity is still relatively low compared to other major rice-producing countries. This study aimed to evaluate the most suitable combination of paclobutrazol concentration and N, P, K fertilization to optimize rice growth and yield performance. The research was conducted from December 2024 to February 2025 in Ngraho Village, Bojonegoro Regency, East Java. A Split Plot Design was employed, involving two factors: paclobutrazol concentration as the subplot factor and fertilizer combination as the main plot factor. In total, 16 treatment combinations were arranged with three replications, resulting in 48 experimental units. The best performance was obtained from the combination of Urea (600 kg/ha), SP36 (300 kg/ha), KCl (200 kg/ha), and paclobutrazol at 600 ppm, which improved multiple growth and yield parameters. The treatment showed statistically significant effects and is recommended for implementation in rice cultivation under similar agroclimatic environments. Further investigations in different regions and planting periods are necessary to assess the stability of these outcomes.
Risk Analysis of Greenhouse-Based Paprika Farming Using Failure Mode and Effect Analysis (FMEA) Ella Stevani Simbolon; Teguh Soedarto; Sri Widayanti
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i1.268-276

Abstract

Bell pepper is a high-value horticultural commodity with strong development potential in Indonesia, including in Tutur District, Pasuruan Regency, East Java. However, productivity in greenhouse-based cultivation often fluctuates due to various production risks. This study aimed to identify and prioritize major risks in greenhouse bell pepper farming using the Failure Mode and Effect Analysis (FMEA) method. The research location was purposively selected, involving 66 farmers. Primary and secondary data were collected and analyzed using descriptive analysis and FMEA. The results identified 17 risk factors affecting bell pepper production. Major risks included high rainfall during the rainy season, water shortages during the dry season, strong winds, pest and disease attacks, declining selling prices, increasing input costs, and limited technical knowledge. Based on Risk Priority Number (RPN) analysis, the most critical risks were thrips pest attacks (RPN 109.12), high rainfall (RPN 52.52), and strong winds (RPN 38.31). These risks require priority mitigation to improve productivity and sustainability of greenhouse bell pepper farming.
The Effect of Dosage and Application Interval of Tofu Waste Liquid Organic Fertilizer on the Growth and Yield of Tomato (Lycopersicum esculentum) Phebian Adam Pahlevy; Djarwatiningsih Djarwatiningsih; Felicitas Deru Dewanti
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 2 (2026): April 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i2.792-800

Abstract

Tofu liquid waste contains organic materials that can be utilized as liquid organic fertilizer (LOF). This study aims to determine the effect of dose and interval of LOF from tofu liquid waste on tomato plants (Lycopersicum esculentum. L). This study, conducted from April to July 2024 in Gajah Bendo Village, Pasuruan, examined the impact of tofu liquid waste-based Liquid Organic Fertilizer (LOF) on tomato plants (Lycopersicum esculentum. L). Utilizing a Completely Randomized Design (CRD) with two factors in triplicates, the researchers tested four dosage levels (0, 100, 200, and 300 ml/plant) and three application intervals (6, 10, and 14 days).  The results of the study found that the combination of LOF tofu liquid waste dosage at a dose of 300 mL/plant with an application interval of 14 days resulted in the fastest flowering age compared to other treatment combinations. However, the combination of dosage and application interval treatments did not significantly affect the parameters of plant height, number of fruits, and fruit sets. The LOF application even tended to reduce the harvest weight of tomato fruit compared to the control treatment. Future research can focus on the optimal fermentation time of liquid waste to prepare LOF and apply the LOF on tomato plants under more controlled conditions such as in a greenhouse.
Comparative Effectiveness of Organic Fertilizer Types on Soybean Growth, Yield, and Soil Health in Sustainable Cultivation Systems Indra Gunawan; Rahmi Dwi Handayani Rambe; Wanda Saputra; Nurhayati Nurhayati; Sri Hafnida Ritonga
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.v14i6.2338-2347

Abstract

Limitations in productivity and adverse impacts of chemical fertilizers highlight the need for sustainable solutions in soybean cultivation in Indonesia. This study aims to evaluate the effectiveness of organic fertilizers as an alternative to chemical fertilizers in sustainable agriculture-based soybean cultivation. The experimental method employed a Completely Randomized Design (CRD) with six treatments: control (no fertilizer), chemical fertilizer, goat manure, compost, biochar, and a combination of POC + compost. The parameters observed included plant height, number of effective root nodules, yield components (number of pods, weight of 100 seeds, yield per polybag), as well as changes in soil chemistry after harvest. The results showed that the treatment of goat manure (P2) and a combination of POC + compost (P5) gave the best results in improving soybean growth and yield. Both also showed significant improvements in soil pH, C-organic content, total nitrogen, and availability of P and K. In addition to increasing crop yields, organic fertilizers have also been proven to support increased soil microbial activity through the formation of effective root nodules. Thus, organic fertilizers have proven to be an effective and environmentally friendly alternative in replacing chemical fertilizers. The use of organic fertilizers can promote productive, efficient, and sustainable soybean farming.
The Potential for Controlling Maize Pest Spodoptera frugiperda (Lepidoptera: Noctuidae) Using Biological Agents Bacillus spp. Muhammad Qoyyimul Amri; Yenny Wuryandari; Noni Rahmadhini
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 2 (2026): April 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i2.608-617

Abstract

Maize production is still facing many challenges nowadays.  One of the main challenges in maize production is pest attacks.  S. frugiperda has been causing significant damage to maize farming in Indonesia recently.  This research was conducted to determine the potential of Bacillus spp. isolates Bcz-20 and Bcz-30 are identified as biological agent candidates to control the S. frugiperda population, with bacterial population densities of 109 CFU/mL, 108 CFU/mL, and 107 CFU/mL, respectively, as determined by in vitro and in vivo application tests.  The Bcz-20 treatment with a population density of 107 CFU/mL was capable of suppressing the S. frugiperda larvae population in an in vitro application test, resulting in a mortality percentage of 47.5%. The Bcz-20 treatment with a population density of 109 CFU/mL was capable of suppressing the S. frugiperda larvae population by in vivo application test, resulting in a mortality percentage of 70 %.  The conclusion, Bacillus spp. Bcz-20 isolates with a population density of 107 CFU/mL are efficient and effective for controlling the S. frugiperda larvae population.
Effect of Solvent Type on the Antibacterial Activity of Trigona laeviceps Propolis Extract Intan Nurul Azni; Dede Robiatul Adawiyah; Uswatun Hasanah; Nancy Dewi Yuliana
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i1.335-345

Abstract

Propolis is a resinous compound which is mixed with saliva, wax, and other metabolic products of bees. One of the benefits of propolis is as an antimicrobial agent. The objective of this research was to determine antibacterial activity Trigona laeviceps bees propolis originating from Bogor West Java extracted with various solvents (water, ethanol, hexane). The tested bacteria consist of 2 Gram negative and 5 Gram positive bacteria. The raw propolis were characterized for gum, tannin, flavonoid, alkaloid, saponin, total phenol content, and proximate composition. Antibacterial activity was tested using the disc diffusion method. The data were analyzed using the ANOVA test and further tested with the Duncan test at a significance level of 5%. The results showed that the largest component of the sampel was lipid (65.47%). Raw propolis contains phenol (3.08 mg/g), tannin (34.45 mg/g), and flavonoid (21.88 mgQCE/g). The highest yield of propolis extract was obtained with hexane solvent (51.03%), followed by ethanol (18.17%), and water (15.58%). All propolis extracts did not have an inhibition zone against Gram-negative bacteria, but did for Gram-positive bacteria. The propolis extract using ethanol showed the highest diameter inhibition zone (16.92 mm). The finding of this study may be utilized to improve Trigona laeviceps propolis quality in Bogor.
Development of Hypoallergenic “Pindang” Tongkol (Euthynnus affinis) Processed by Pressurized Heating Regina Caely Saing; Nur Wulandari; Nurheni Sri Palupi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 2 (2026): April 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i2.499-509

Abstract

Tongkol (Euthynnus affinis) or Mackerel tuna consumption in Indonesia remains limited due to the presence of the allergenic protein parvalbumin. This study aimed to evaluate the chemical composition, physical properties, protein molecular weight profile, and allergenicity of pindang tongkol processed by pressurized heating. A Completely Randomized Design with three autoclave time treatments (15, 20, and 25 min) at 150 °C and 0.103 MPa was applied. Chemical composition and physical properties were analyzed, protein profiles were determined using SDS-PAGE, protein concentration by the Bradford method, and texture by Texture Profile Analysis (TPA). Allergenicity was assessed qualitatively by immunoblotting and quantitatively by ELISA. Pressurized heating altered the chemical composition and physical properties of tongkol. SDS-PAGE revealed protein band at 10–12 kDa, suspected to be parvalbumin, in all samples; however, immunoblotting detected parvalbumin only in the raw sample. Allergen content decreased by 71, 86, and 97% after 15, 20, and 25 min of heating, respectively, compared to raw fish. Pressurized heating during pindang processing effectively reduced allergenicity and may improve the safety of mackerel tongkol consumption for individuals with fish protein hypersensitivity

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