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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
 101   102   103   104   105 
Efficacy of Endophytic Bacteria as Entomopathogens against Spodoptera frugiperda (Lepidotera: Noctuidae) on Corn (Zea mays L.) Kurniawati, Kurniawati; Purnawati, Arika; Windriyanti, Wiwin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.1040-1050

Abstract

The fall armyworm (Spodoptera frugiperda) poses a problem for corn plants (Zea mays L.). The use of endophytic bacteria Bacillus sp. as an entomopathogen is expected to control the S. frugiperda pest. This study aims to determine the effective concentration of the bacteria and the active compounds produced by Bacillus sp. strain Bth 22 in controlling S. frugiperda. The research was conducted from August to October 2024 at the Plant Health Laboratory of the Faculty of Agriculture, UPN "Veteran" East Java, and the Airlangga Research Hub in Surabaya. The study was designed using a completely randomized design (CRD) with bacterial concentration treatments of 0% (control), 10%, 15%, 20%, 25%, 30%, and 35%, repeated five times. Observational parameters included mortality rate, number of pupae and imago formed, as well as the mechanisms and compounds produced by Bacillus bacteria based on HPLC and FT-IR tests. The application of Bacillus sp. Bth-22 affected the mortality parameters, the number of pupae formed, and the number of imago formed. The Bacillus sp. Bth-22 bacteria produced metabolites in the form of hydrocarbon derivatives and amide group compounds, disrupting metabolism and digestion, leading to the mortality of S. frugiperda. Keywords: Entomopathogen, Metabolite compounds, Spodoptera frugiperda, Zea mays 
Fulfillment of Distribution Permit Requirements for Yoghurt MSMEs Prastyanty, Rini; Rahayu, Winiati P.; Wulandari, Nur
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.1012-1021

Abstract

Micro, small and medium enterprises (MSMEs) face challenges in obtaining distribution permits from the Indonesian Food and Drug Authority (BPOM) for food produced domestically, due to their limited knowledge and competence in implementing good manufacturing practices (GMP) and preparing the registration requirements. This study aimed to: (1) improve the achievement of GMP implementation in yoghurt MSMEs in preparation to get distribution permits; and (2) verify the fostering results of yoghurt MSMEs through microbiological testing. Field observations and interviews were conducted over the owner or manager of seven yoghurt MSMEs using assessment form, and mentoring program was developed to help the MSMEs fulfill permit requirements. Verification was done through microbiological testing. Results of the study showed that yogurt enterprises with ratings A, B, and C were found to have one MSME each (14.3%), while four MSMEs (57.1%) were at D ratings.  The mentoring program for two MSMEs (A and B ratings) showed the decrease of unconformities and increase of MSME rating from B to A. The mentoring program has been successful in bringing the two MSMEs to fulfill all registration requirements for processed food distribution permit. The result of the Salmonella test on yoghurt samples was negative, and the presence of Enterobacteriaceae was within the permissible limits (<10 colonies/g). Keywords: GMP, MSME, Processed food, Distribution permit, Yoghurt.
Performance of Agricultural Extension Workers: The Impact of Internal and External Factors Falo, Marsianus; Matoneng, Ody Wolfrit; Tabenu, Oktovianus
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1465-1475

Abstract

This study aims to describe the internal and external characteristics of agricultural extension workers and analyze their influence on extension performance in North Central Timor Regency. A quantitative approach was employed using a survey method involving all 126 active agricultural extension workers, supplemented by qualitative data through Focus Group Discussions (FGDs) using a snowball sampling technique. Structural Equation Modeling-Partial Least Squares (SEM-PLS) was used to analyze the collected data. The results show that internal factors such as productive age, very high formal education, long working experience, high work motivation, and high income positively contribute to extension performance, while areas of expertise and training still require improvement. External factors such as the availability of facilities and access to agricultural technology were categorized as high, whereas media consumption, farmer participation, land potential, and the reward system were relatively low. The research model revealed that internal and external factors together explain 81.5% of the variance in extension performance (R² = 0.815), with an overall model fit of 96.3% (Q² = 0.963). These findings highlight the importance of enhancing areas of expertise and increasing media information consumption to strengthen agricultural extension performance in the future.
Study of Spray Fogging Performance Using a Combination of Fogging Machine, Electric Sprayer, and Air Blower Pramuhadi, Gatot; Natanael, Josua; Daliesta, Nenda Fuji Putri
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.866-878

Abstract

This study aims to determine and analyze the parameters of spray fogging performance for the application of pesticide fog. Air blower spraying performance can be increased by regulating the type of fan and type of air blower. Setting the type of fan in air blower is axial fan and centrifugal combined with cone of 4, 6, and 8 holes. The most optimum combination of the test treatment is the combination of axial fan air blower and 4-hole cone. Spray fogging can be increased by adjusting the combination spray angle between fogging machines and air blowers at various observation distances. The combination spray angle setting is angle of 15°, 30°, and 45° and the observation distance of 1 meter to 4 meters. The results of the analysis and determination of spray fogging performance parameters produce an angle of 45° as the most optimum spray angle from the observation distance of 1 meter to 4 meters. This is indicated by the average value of the droplet diameter of 78.74 μm, a 70 droplet/cm2 droplet density, an air flow speed of 1.97 m/s, and the temperature of the flocking of 31.8℃. Keywords: Air blower, Droplets, Fogging, Nozzle, Spray.
Cover Vol 14 No 2, April 2025 jtep, jtep
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.%p

Abstract

Preface February 2025 jtep, jtep
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 1 (2025): February 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i1.%p

Abstract

Comparative Analysis of Growth Models for Lettuce (Lactuca sativa) in a Plant Factory under Red-Blue LED Treatment Putra, Guyup Mahardhian Dwi; De Side, Gagassage Nanaluih; Setiawati, Diah Ajeng; Kurniati, Nia
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1452-1464

Abstract

The growth of lettuce (Lactuca sativa) in controlled environments such as Plant Factories is highly influenced by lighting, particularly under red-blue (RB) LED treatment. Accurate growth prediction models are essential for optimizing yield. This study compared four models linear, polynomial, logistic, and Gompertz to determine the best predictor of leaf area expansion. Leaf area measurements over 30 days were analyzed using Easy Leaf Area software. Results showed that the Gompertz model consistently outperformed others with the lowest Mean Absolute Percentage Error (MAPE) of 14.55% (slow), 39.51% (medium), and 29.13% (high), and the highest R² values of 0.99 across all growth categories. In contrast, linear and polynomial models exhibited extremely high MAPE values, exceeding 300% in most cases. The study concludes that the Gompertz model is the most accurate and biologically realistic for modeling lettuce growth in Plant Factory systems, offering robust predictive capability for sustainable precision agriculture.
Product Development of High Carotenoids Chocolate Confectionery Based on Red Palm Olein Oleogel Amanda, Tria; Wulandari, Nur; Hunaefi, Dase
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1893-1904

Abstract

Red palm oil (RPO)-based oleogel had potential as a substitute for cocoa butter substitute (CBS) in the manufacture of chocolate confectionery. This study aimed to obtain the optimum formula of chocolate confectionery with RPO-based oleogel and determine the physicochemical characteristics, sensory profile and hedonic rating, nutrition facts, and contribution to meet the vitamin A requirement. The methods used were: (1) manufacture and characterization of RPO-based oleogel, (2) optimization formulas of chocolate confectionery with RPO-based oleogel by D-optimal mixture design, and (3) characterization of chocolate confectionery with RPO-based oleogel. The result showed that RPO-based oleogel had a high carotenoid content of 545.87±3.39 mg/kg and slip melting point of 46.67‒47.83°C. The optimum formula was 17.780% CBS, 13.880% RPO-based oleogel, and 3.340% stearin which had a texture of 1861.49 gf and total carotenoids of 207.861 mg/kg. The sensory profile of chocolate confectionery with RPO-based oleogel based on the RATA method was yellow color; sweet, milk, fatty, and vanilla flavor; sweet, bitter, and fatty aftertaste; hard texture; melted, sandy, and sticky mouthfeel. The score of children panelists’ liking was 4.52 (liked extremely). One serving size of this product fulfilled 12% of the daily vitamin A requirement from the total requirement of 600 RE.
Effect of Fungal Bioformulator Concentrate on the Growth and Yield of Corn (Zea mays L.) under Dryland Conditions Apzani, Wawan; Wardhana, Agung Widya
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1496-1505

Abstract

The urgency of this research lies in the application of bioformulator fungal concentrate as a renewable product with more economical synthesis costs, utilizing the natural potential of surrounding environment to stimulate the growth of corn in dry land. The primary objective of this study is to increase corn production in in Toya Village, Aikmal District, East Lombok, West Nusa Tenggara (NTB), to meet community needs. The research method used is an experimental method with field trials. This study employs a Randomized Complete Block Design (RCBD) with factorial experiment consisting of four levels of BFK and three levels of variety. Each treatment is repeated three times, resulting in a total of 36 experimental units. The data were analyzed using analysis of variance (ANOVA), and if significant differences are found, the Honestly Significant Difference (HSD) was conducted using test at a significance level of 95%. The application of fungal bioformulator concentrate did not show a significant effect in improving the growth and yield of maize in dryland conditions.
Insect Diversity Study on Shallot Plants: Comparison of Ecological Engineering and Conventional Cultivation Systems Seftiarini, Amelia; Mujoko, Tri; Windriyanti, Wiwin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1476-1488

Abstract

This study examines the cultivation of shallots using an ecological engineering approach to enhance insect diversity and natural pest control. The applied methods include compost application, refugia planting, and the use of biological agents to reduce synthetic pesticide dependence. The study compares two management systems: ecological engineering farmland (EF) and conventional farmland (CF), with insect data collected using various trapping methods. The results show that EF had a higher insect population (23,428 individuals) compared to CF (14,880 individuals). A total of 181 morphospecies from 10 orders, 85 families, and 170 genera were identified, with Coleoptera being the dominant order and predatory insects prevailing in both farmlands. The diversity index was higher in EF (3.079) than in CF (2.725). The evenness index was also higher in EF (0.608–0.624) than in CF (0.561–0.603), indicating a more stable ecosystem. The dominance index was low in both farmlands (0.003–0.188), showing no single species significantly dominated. The community similarity index was relatively high at 0.666 (vegetative), 0.651 (generative), and 0.712 (one growing season). Although the t-test showed no significant differences, EF tends supports more sustainable shallot farming by enhancing biodiversity and ecosystem stability. Further research is needed to evaluate long-term impacts and the implementation of polyculture systems to strengthen agricultural ecosystems.

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