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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
 113   114   115   116   117 
Effect of Serratia sp. Application Rate on Frost Damage, Growth, and Yield of Potato (Solanum tuberosum L.) Under Field Conditions Inggil Setyo Nugroho; Yuniel Melvanolo Zendrato; Maria Marina Herawati
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.v15i2.821-831

Abstract

Frost damage poses a major constraint to potato (Solanum tuberosum L.) production in the Dieng Plateau, leading to significant yield loss. This study aimed to evaluate the effectiveness of Serratia sp. in mitigating the physical impacts of natural frost and improving plant growth and yield. The experiment was arranged in a Randomized Complete Block Design (RCBD) with four treatments of bacterial suspension application volume (density of 1 × 107 CFU/ml): control (0 ml/plant), 20 ml/plant, 40 ml/plant, and 60 ml/plant. A natural frost event occurred at a minimum temperature of -2 °C, causing minor damage. The results showed that the application of 60 ml/plant provided the best protection, with the lowest incidence of damage (<0.5%). The 40 and 60 ml/plant treatments consistently showed the highest plant height and leaf area, indicating accelerated vegetative recovery post-stress. In terms of yield, the 60 ml/plant treatment produced the highest tuber weight per plant (1,363 g). Further analysis confirmed that application volumes of 40 and 60 ml/plant significantly increased tuber size compared to the control. It was concluded that the application of Serratia sp. at a volume of 60 ml/plant was the best treatment in this study for stabilizing plant growth and maintaining potato productivity under low-temperature stress conditions in highland environments.
Performance Evaluation of a Modified Granulator Based on Operating Parameters for Bioherbicide Granule Production Gatot Pramuhadi; Muhamad Achmad Chozin; Endang Gunawan; Vitho Alveno; Kusuma Darma
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.v15i2.554-561

Abstract

Bioherbicide granules is a new innovation in weed control produced using a granulator machine. This study aimed to evaluate the performance of a modified pan granulator prototype intended for bioherbicide granule production. Wheat flour and tapioca flour were used as starch-based substitute materials to assess the mechanical performance of the granulator. Granulation performance was evaluated by varying the pan inclination angle, pan rotational speed, and spraying duration. The experimental treatments consisted of two inclination angles (40° and 45°), two rotational speeds (15 rpm and 35 rpm), and three spraying durations (20 s, 30 s, and 40 s). The results showed that the machine produced granules with an average diameter ranging from 4.01 mm to 6.08 mm and diameter uniformity between 90.80% and 96.23%. Increasing the spraying duration enhanced inter-particle bonding, resulting in larger granule diameters, while increasing the pan rotational speed from 15 rpm to 35 rpm reduced granule size due to stronger material–scraper interactions. The most favorable granulation performance among the tested conditions was obtained at pan inclination angle of 40° and rotational speed of 35 rpm, producing average granule diameters <5 mm that in accordance with SNI 7698:2011. Higher rpm resulted in more stable granule diameter uniformity, indicating improved particle homogeneity.
Enhancing Morphological and Physiological Sugarcane Growth through Natural Plant Growth Regulators Made of Banana Weevil Saktiyono Sigit Tri Pamungkas; Karisma Ridha Yulianto; Fitria Nugraheni Sukmawati; Yudhi Pramudya; Farrah Fadhillah Hanum; Muhammad Sahbudin; Sukarji Sukarji
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.v15i2.720-731

Abstract

Natural plant growth regulators (NPGR) have a significant impact on plant growth, particularly on plant morphological and physiological characteristics. The aim of this study was to examine the effects of immersion duration with banana weevil NPGR on the physiological and morphological traits of bud chips of sugarcane clone PS 862. The experiment was arranged in a randomized completed block design with a single factor of immersion duration. Five immersion treatments included T0 (control), T1 (1.5 h), T2 (3 h), T3 (4.5 h), and T4 (6 h), were performed with 5 samples and 3 blocks of replications, resulting in a total of 75 plant samples. Results revealed that immersion of 1.5 h was optimal for NPGR absorption in sugarcane seedlings with better plant growth. Immersion for 1.5 h resulted in the significantly highest stem diameter (6.03 mm), the longest root length (43.73 cm), and the highest stomatal density (127.04 stomata/mm²). These indicated the improved physiological performance of sugarcane seedlings under moderate NPGR exposure. Significant effect was not observed on the total amount of chlorophyll; most likely due to the small number of leaves generated during the seedling phase. The study concluded that using NPGR, especially with a 1.5 h immersion time, could improve the growth and morphological characteristics of BC variety PS 862.
Flood Discharge Modeling through Hydrological Parameter Calibration Using HEC-HMS in the Lower Air Bengkulu River Ekanto Wahyudi Susetyo; Hadi Kardhana; I Putu Hartawan; Firmana Siddik; Hadi Buana
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.v15i2.627-638

Abstract

The Air Bengkulu River experiences flooding at least twice a year due to increased discharge during the rainy season. This study aims to calibrate hydrological model parameters based on daily rainfall data for the flood event of 30 August 2022 using HEC-HMS modeling to obtain a best design for flood discharge. Calibration was conducted by simulating the rainfall occurred during the flood event to reproduce the observed discharge recorded at the gauging station, using the SCS-Curve Number (SCS-CN) loss method and the Snyder transform method in HEC-HMS 4.10. The parameters included the Peak Rate Factor (PRF) in the SCS loss scheme and the Ct and Cp coefficients in the Snyder method, while the CN and impervious values were determined based on land-use maps. The results indicated that both approaches produced relatively similar calibration outcomes; however, the Snyder method is better than the SCS-CN. The Snyder approach showed moderate performance with PBIAS = 0.34% (Very Good), RMSE = 0.7 (Satisfactory), and NSE = 0.509 (Good). It was, therefore, adopted for design flood discharge estimation with results Q2 = 277.9 m³/s, Q5 = 458.5 m³/s, Q10 = 585.9 m³/s, Q25 = 752.6 m³/s, and Q50 = 879.4 m³/s. The observed discharge during the 30 August 2022 flood event (478.55 m³/s) falls between the Q5 and Q10 return periods. Overall, the study demonstrates that parameter calibration plays a crucial role in improving hydrograph representation, although further evaluation using hourly data and multiple flood events is necessary to enhance model reliability.
Evaluation of the Physical and Chemical Profiles of Instant Rice Based on Germinated Brown Rice of Inpari 32 Variety Desy Triastuti; Fitri Audia; Enceng Sobari; Rafi Fauzan
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.v15i2.597-607

Abstract

Brown rice is dehulled rice that retains its bran layer and therefore has higher fiber and nutrient content than white rice. Germination and instant processing are applied to improve the quality of brown rice and shorten cooking time. This study aimed to evaluate the effects of soaking duration (12 and 24 h) and germination time (36, 48, and 60 h) on the physical and chemical properties of instant rice produced from germinated brown rice (GBR) of the Inpari-32 variety, using a nested randomized block design. Variables for GBR included yield, radicle emergence, moisture content, ash content, and amylose content, while instant rice was evaluated for bulk density, yield, moisture content, ash content, and amylose content. Data was analyzed using ANOVA followed by DMRT at the 5% significance level. Results showed that soaking and germination duration had no significant effect on GBR yield or amylose content of instant rice, whereas germination time significantly affected GBR moisture and ash content, which ranged within national quality limits. The resulting instant rice had low bulk density, acceptable moisture content, and relatively high ash (mineral) content. A combination of 12 h soaking and 36 h germination is recommended as an efficient treatment to produce instant rice from GBR with acceptable physical and chemical quality.
Effect of Ignition Point Location on Temperature Profile and Syngas Composition in Downdraft Gasification of Coconut Shell and Wood Sawdust Purwinda Iriani; Tina Mulya Gantina; Yanti Suprianti
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.v15i2.801-810

Abstract

The utilization of biomass waste as an energy source, such as for hydrogen and methane gas production, can be achieved through the gasification process. This study aims to analyze the performance of biomass gasification using coconut shells and wood sawdust for syngas production, by comparing the effects of different ignition point positions on process effectiveness. The gasification process was carried out using a down-draft type gasifier reactor. Two main variables were examined: the type of biomass (coconut shell and wood sawdust) and the ignition point location (upper and middle positions). The measured parameters included temperature profiles and syngas composition (H₂ and CH₄). The results showed significant differences based on the ignition point position. The upper ignition point only reached relatively low temperatures (72–262 °C) within six minutes, whereas the middle ignition point achieved a much higher operational temperature (825 °C) after 10 min of ignition. Syngas analysis revealed that wood sawdust produced a higher hydrogen content (4.46%) compared to coconut shell (1.79%), while coconut shell produced a higher methane content (3.4%) than wood sawdust (1.17%). These findings indicate that ignition location plays a critical role in controlling the thermal zone development and gasification efficiency. Optimizing ignition position can significantly improve syngas quality and reactor performance in downdraft gasification systems.
Farmers’ Knowledge Gaps in Irrigation Modernization: A SECI Model Approach in the Krueng Aceh Region Dewi Sri Jayanti; Ferijal Teuku
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.v15i2.639-651

Abstract

The modernization of irrigation systems requires farmers to manage knowledge effectively, adapt to technological changes, and participate actively in increasingly complex institutional arrangements. This study analyzed farmers’ knowledge gaps (K-Gap) and the knowledge transformation process using the SECI model in the Krueng Aceh region. A descriptive mixed-methods approach was applied through interviews, observations, questionnaires, and documentation. Quantitative analysis using PLS-SEM assessed inter-variable relationships, while K-Gap and IPA identified priority knowledge areas. All constructs met validity and reliability requirements, with Composite Reliability values ranging from 0.835 to 0.982 and AVE values between 0.559 and 0.933. The conformity level of 99.32% indicated strong alignment between farmers’ perceptions and expectations of institutional performance. K-Gap analysis showed that infrastructure had the highest knowledge gap (0.05), while water management had the lowest (0.02). The integrated results of IPA and SECI revealed strengths in the socialization and internalization stages, indicated by active participation, mutual cooperation, and consistent water distribution, while weaknesses were concentrated in the externalization and combination stages, particularly in documentation and knowledge integration. Therefore, strengthening SECI-based knowledge management is recommended, with emphasis on improved documentation, technical capacity building, and more effective support systems to ensure the sustainability of irrigation modernization in the Krueng Aceh.
Evaluation of Land Suitability for Cempedak (Artocarpus campeden Spreng) in Batu Mandi and South Paringin Districts, Balangan Regency, South Kalimantan Muhammad Rayhan Ghiffari; Nurlaila Nurlaila; Nukhak Nufita Sari; Andin Muhammad Abduh; Ronny Mulyawan; Hikma Ellya; Rila Rahma Apriani
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.v15i2.871-881

Abstract

Land quality is a key determinant of fruit production, supporting nutrient supply, food security, and sustainable agriculture. This study evaluates potential changes to land suitability classes to improve land-use planning and spatial rearrangement, notably to support the development of cempedak cultivation in Batu Mandi and South Paringin Districts, Balangan Regency, South Kalimantan Province. The research was conducted from May to August 2025 using a matching method to link land characteristics   to suitability criteria for cempedak, and the results were presented as ArcGIS maps. Results show both districts have considerable potential for cempedak development, although current conditions fall within unsuitable (N) and marginally suitable (S3) classes. In Batu Mandi District, actual suitability is S3 covering 11,238.48 ha, and N covering 1,541.61 ha. In South Paringin District, cempedak suitability is also S3, covering 6,953.21 ha. The main limiting factors include unsuitable soil texture, low base saturation, acidic soil pH, and low nutrient availability of P₂O₅ and K₂O. Improvement efforts involving adding pelleted compost and liming with high cultivation, and fertilising with moderate cultivation of triple superphosphate and KCl potentially increase suitability from S3 to S2 or even S1. Therefore, the land has the potential to become a cempedak planting area and produce maximum productivity.
Preface February 2026 Editor JTEP-L
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

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Abstract

Preface April 2026 Editor JTEP-L
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

Abstract

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