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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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Effects of ZnO-Based Smart Urea Coating on Ammonium Release and Characterization of Soil Ureolytic Bacteria in Loamy Soil Fathia Meidy Nurindriana; M. Wasilul Lutfi; Atiqah Aulia Hanuf; Soemarno Soemarno; Sugeng Prijono
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.v15i1.322-334

Abstract

The application of ZnO-coated urea is a promising strategy to reduce nitrogen losses and improve zinc availability in soils. This study aimed to evaluate the effects of ZnO-coated urea on soil ammonium concentrations and ureolytic bacterial populations. A completely randomized design was used with five treatments:control (CU), uncoated urea (CU) and ZnO-coated urea at three different coating (bulk ZnO (NCU-Z), ZnO NPs (NCU-ZNP), and  ZnO NPs combined with bentonite NPs (NCU-ZBNP)), each with four replications. Soil samples were incubated on sterile jars under controlled conditions for 8 weeks and used loamy soil as a medium. Ammonium concentrations were measured using the spectrohotometry, while ureolytic bacteria were enumerated using the total plate count (TPC). NCU characterization results revealed inconsistencies in coating thickness, however, it has shown significant results on soil ammonium content and total ureolytic bacteria population. Results on the number of ureolytic bacterial populations showed that NCU-ZNP treatment could reduce the number of bacteria up to 77.8%. The research results also showed that the NCU-ZBNP treatment significantly maintained soil ammonium levels that were 1.76 times higher compared to CU.These findings suggest that ZnO-coated urea can slow nitrogen transformation and potentially improve nitrogen use efficiency while influencing soil microbial communities.
Sustainable Extraction of Cinnamon Phenolics through Synergy of Green Solvents and Microwave-Assisted Technology Nanin Agustin; Devi Yuni Susanti; Muhammad Prasetya Kurniawan
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.v15i1.243-255

Abstract

Increasing global awareness of environmental issues has encouraged the development of sustainable and eco-friendly methods for extracting phenolic compounds from Cinnamomum burmannii. This study integrates Microwave-Assisted Extraction (MAE) with Natural Deep Eutectic Solvents (NaDES) as a green extraction approach. The objectives were to evaluate thermal efficiency, energy consumption, carbon emissions, and extraction kinetics at microwave powers of 640, 720, and 800 W using citric acid–sucrose as the solvent. The highest thermal efficiency (69.82%) was achieved at 640 W, with an energy consumption of 540.86 kJ and carbon emissions of 0.131 kg CO₂e. Extraction kinetics were described using the Peleg model, which accurately represented changes in phenolic concentration during extraction. The highest extraction rate constant (B₀ = 0.2117 mg/mL·min) was obtained at 640 W, while the highest equilibrium capacity constant (Ce = 0.6982 mg/mL) and total phenolic content (6.42 ± 0.046 mg GAE/mL) were achieved at 800 W. These findings indicate that increasing microwave power enhances both extraction rate and phenolic yield. Compared with conventional methods, MAE combined with NaDES demonstrated lower energy consumption and reduced carbon emissions, highlighting its potential as a sustainable extraction technology.
Ray Tracing-Based Modeling of Bifacial Photovoltaic Systems in Greenhouse Agrivoltaics Endang Widiyawati; Subiyanto Subiyanto; Siti Ridloah; Budi Sunarko; Bagaskoro Saputro; Rizky Ajie Aprilianto; Mario Norman Syah; Abdurrakhaman Hamid Al-Azhari; Deyndrawan Sutrisno; Aisya Fathimah; Apriansyah Wibowo; I Gede Bagus Jayendra
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.v15i2.510-524

Abstract

This work presents an enhanced ray tracing-based modeling framework to optimize bifacial photovoltaic energy generation and crop productivity within greenhouse environments. The proposed framework integrates a ray tracing-based optical and electrical model to simulate light dynamics and energy generation within greenhouse structures. The optical model incorporates Uniform Distribution of rear-irradiance (UF) and Non-Uniform Distribution of rear-irradiance (NUF) principles to simulate irradiance distribution, shading, and reflection, using Light Saturation Point (LSP) and Photosynthetically Active Radiation (PAR) measurements. The electrical model estimates energy yield using the LambertW function based on incident and transmitted light through photovoltaic arrays. Five types of greenhouse structures using plastic and SG80 materials are analyzed to assess their impact on system performance under various conditions. The evaluation showed that integrating bPV increased rear-side energy captured by 25-30%. The optimal configuration was achieved by combining a plastic cover with a checkerboard pattern, resulting in up to 5% higher performance than the 35° tilt setup and offering enhanced light distribution uniformity. Although the average soil irradiance of 170.801 W/m² slightly exceeded the light saturation threshold of 164.7 W/m², it remained within a safe range that supports efficient photosynthesis without causing photoinhibition.
Land Suitability Evaluation for Durian (Durio zibethinus Murr.) Cultivation Based on Nutrient Retention Bagas Dewa Setiawan; Purwadi Purwadi; Maroeto Maroeto
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.v15i1.175-183

Abstract

Indonesia possesses vast land resources, offering significant potential for agricultural development. Among high-value commodities, durian (Durio zibethinus Murr.) is widely cultivated. Bumiaji District in Batu City, characterized by hilly topography and extensive agricultural land, serves as a prominent durian production center. Optimizing durian productivity, however, requires a thorough understanding of land suitability based on soil characteristics. This study evaluated land suitability for durian cultivation in Bumiaji District, focusing on key soil chemical properties, including soil pH, cation exchange capacity (CEC), base saturation (BS), and organic carbon (C-organic) content. The research was conducted using a survey method with purposive random sampling based on land mapping units (LMUs). Results indicated that most areas were classified as highly suitable (S1) based on CEC and organic carbon parameters, with CEC values ranging from 18.89 to 35.97 cmol/kg and C-organic levels above 1.2%. However, limitations were noted for pH and base saturation, with some areas classified as moderately (S2) or marginally suitable (S3). Improving land suitability can be achieved through targeted soil management strategies, such as liming with dolomite to enhance pH and base saturation. The findings of this study are expected to serve as a reference for implementing sustainable land management practices aimed at boosting durian productivity in Bumiaji District.
Effect of Methanol–NaOH Catalyst Variations on the Properties and Engine Performance of B50 Biodiesel from Waste Cooking Oil Suardi Suardi; Hariyono Hariyono; Faisal Mahmuddin; M. Rusydi Alwi; Muhammad Uswah Pawara; Alamsyah Alamsyah; Wira Setiawan
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.v15i1.79-89

Abstract

The growing demand for environmentally friendly fuels has encouraged the use of biodiesel as an alternative to fossil diesel. This study explores the production of B50 biodiesel derived from waste cooking oil using the transesterification method, with two catalyst variations: (1) 1000 mL methanol + 25 g NaOH and (2) 1200 mL methanol + 30 g NaOH per 5 liters of feedstock. The research aimed to evaluate the effects of catalyst concentration on the physical properties of biodiesel (density, viscosity, and calorific value), as well as its impact on engine performance metrics, including torque, specific fuel consumption (SFC), thermal efficiency, and exhaust gas opacity. Experimental testing was conducted using a four-stroke diesel engine at varying loads and speeds. Results showed that both fuel blends met the Indonesian standards for density, while only the 1200 mL + 30 g NaOH blend met the standard for viscosity. The biodiesel prepared using 1000 mL methanol and 25 g NaOH demonstrated superior engine performance, with a maximum torque of 8.92 Nm, minimum SFC (406.90 g/kWh), and highest thermal efficiency (21.28%) at 1000 RPM and 4000 W load. Additionally, the biodiesel prepared using 1200 mL methanol and 30 g NaOH produced lower exhaust opacity. In conclusion, while increased catalyst dosage improves fuel cleanliness and compliance with standards, the lower catalyst yields the best balance of performance metrics, making it a promising for biodiesel application in diesel engines.
The Effect of Water Application Levels on the Nutritional Value of Maize (Zea mays L.) Forage under Biochar-Amended Vertisol Soil in Kupang Regency, East Nusa Tenggara Masria Masria; Maria Klara Salli; Magfira Syarifuddin; Cokorda Bagus Dharma Putra Mahardika; Jemseng Charles Abineno
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.v14i6.2370-2379

Abstract

This study aimed to examine the effect of different water levels on the growth and nutritional value of maize (Zea mays L.) forage grown on Vertisol soil amended with corncob biochar. The research was conducted in Oesao Village, Kupang Regency, East Nusa Tenggara. Biochar was produced by pyrolyzing corncobs at 300–600 °C and applied in the soil at 6% by weight. The experiment used a Completely Randomized Design with four water levels (K1 = 100%, K2 = 90%, K3 = 80%, K4 = 70% of field capacity) and six replications for measuring plant growth. Soil property and proximate analyses were conducted using composite samples with three replications. Chemical properties of biochar, initial and post-treatment soil properties, plant growth (height, number, and leaf area), and forage nutritional quality were analyzed. The results showed that treatment K4 improved soil chemical properties including organic carbon, P₂O₅, cation exchange capacity (CEC), and exchangeable cations. Treatment K1 produced the best vegetative growth with the most leaves, leaf area, and plant height. Meanwhile, treatment K3 resulted in the best forage nutritional quality, with the highest nitrogen, crude protein, and crude fat content and the lowest crude fiber content. Overall, treatment K3 was considered the most optimal because it balanced plant productivity and forage quality.
Shelf Life Estimation of Taro Flour Packaged in Polypropylene (PP) and High-Density Polyethylene (HDPE) Using The Arrhenius Approach Shafira Pradyta; Dyah Wulandani; Rokhani Hasbullah
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.v14i6.2391-2403

Abstract

Taro flour stored for an extended period tends to experience a decline in quality. Therefore, determining the optimum storage period is essential. The Accelerated Shelf Life Testing (ASLT) method using the Arrhenius model was applied to estimate the shelf life of taro flour. The research on taro flour was carried out in three stages. The first stage involved the production of taro flour. The second stage included monitoring changes in quality during the storage period. The third stage focused on estimating the shelf life of taro flour packaged in polypropylene (PP) and high-density polyethylene (HDPE) materials. Drying and milling taro tubers produced taro flour with a final moisture content of 10%. During the storage period, observations were made on moisture content, whiteness degree, and protein content. Shelf life estimation was conducted using the Arrhenius model, with the selection based on a critical quality parameter protein content. The results indicated that the estimated shelf life of taro flour based on protein content in PP and HDPE packaging at 25 ℃ was 223 days and 285 days, respectively. Meanwhile, at storage temperature of 28 ℃, the shelf life of taro flour in PP and HDPE packaging was estimated to be 147 days and 183 days, respectively.
Land Suitability Evaluation for Cardamom (Elettaria cardamomum) Cultivation in Sumber Rejo Village, Purwosari Subdistrict, Pasuruan Regency Agus Zainur Roziqin; Purwadi Purwadi; Purnomo Edi Sasongko
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.v15i2.525-533

Abstract

Market demand for cardamom (Elettaria cardamomum) continues to rise, yet its cultivation remains limited to specific regions with suitable environmental conditions. Therefore, land suitability evaluation is essential as a basis for planning the development of this commodity. This study aims to assess land suitability for cardamom cultivation in Sumber Rejo Village, Purwosari Subdistrict, Pasuruan Regency. The evaluation was based on physical and chemical soil properties, including pH, organic carbon (C-organic), cation exchange capacity (CEC), base saturation, as well as soil texture and slope. Samples were collected from two types of land use: dry land (tegalan) and coffee plantations, with a total of six sampling points. The results showed that soil pH ranged from 5.70 to 5.92 (S1), C-organic ranged from 1.61% to 2.79% (S1), CEC from 23.93 to 33.07 cmol/kg (S1), and base saturation was in average < 35% (S2). Overall, the study area falls into the moderately suitable (S2) category for cardamom cultivation with potential improvement to S1 through manure and compost application. This evaluation, however, was based on only four parameters so that future research should continue with other parameters to have a more comprehensive results on land suitability for cardamom cultivation in Sumber Rejo village.
The Effect of NPK and Guano Fertilizer on the Growth and Yield of Bogor Peanut Plants (Vigna subterranea (L.) Verdc.) Vanessa Gabrielle Liemendy; Widiwurjani Widiwurjani; Juli Santoso
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.v15i2.702-709

Abstract

This study aimedto evaluate the effects of combined NPK fertilizer and guano application on the growth and yield of Bambara groundnut (Vigna subterranea (L.) Verdc.). The experiment employed a factorial randomized block design with two factors: NPK fertilizer dosage (25%, 50%, 75%, and 100% of recommended rates) and guano dosage (5, 10, and 15 tons/ha). Observed parameters included plant height, leaf count, number of flowers, number of pegs, and fresh/dry pod weight per plant. Results demonstrated that the combination of 25% NPK and 15 tons/ha guano significantly improved plant height (43.29 cm), flower count (47.33), and fresh pod weight (81.73 g/plant). Guano alone also exhibited a substantial effect on both vegetative and generative growth, with the highest results observed at 15 tons/ha. The combination of low NPK and high guano dosages enhances Bambara groundnut productivity sustainably.
Assessment of Carbon Capture and Storage in Plantation and Garden Agroecosystems in Tuntang Hulu Sub-Watershed Rosita Mustikasari; Bistok Hasiholan Simanjuntak
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.v14i6.2380-2390

Abstract

Agroecosystems such as gardens and plantations play a crucial role in climate change mitigation through carbon capture and storage (CCS). This study aimed to analyze the carbon storage potential of these two agroecosystem types in the Tuntang Sub-Watershed and to examine the factors influencing it. A quantitative-descriptive approach was employed, involving biomass measurement both above and below round, along with analyses of soil physical and chemical properties at 41 sampling points. Results showed that the average CCS capacity in plantation areas reached 380.51 tons/ha, slightly higher than that of gardens at 333.30 tons/ha, although the difference was not statistically significant. Contributing factors to carbon storage capacity included vegetation type, soil pH, soil texture, and bulk density. Plantations were dominated by perennial woody crops producing higher biomass, whereas gardens were more commonly planted with annual crops. Therefore, well-planned vegetation management, particularly mixed agroforestry systems, has the potential to enhance CCS efficiency. These findings serve as an important foundation for planning sustainable agroecosystem management as a strategy for climate change adaptation and mitigation.

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