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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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The Effect of Dosage and Frequency of Potassium Fertilization on the Growth and Yield of White Eggplant (Solanum melongena L. var. Kania) Abdulloh, Kholid Ihsan; Hidayat, Ramdan; Nugrahani, Pangesti
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.v14i6.2006-2016

Abstract

Eggplant plants have a high flower drop rate, resulting in a low fruit set. Potassium fertilizer plays an important role in plant physiology and can help reduce flower drop. This study aims to determine the effect of dosage and frequency of potassium fertilization on the growth and yield of white eggplants. The research was conducted in Mojosari District, Mojokerto Regency, East Java, from December 2023 to March 2024. This research was a factorial study with two factors arranged in a Completely Randomized Design. The first factor is potassium fertilizer dosage, which included 3 levels (3, 6, and 9 g/plant), and the second factor is fertilization frequency, which included 3 levels (2, 3, and 4 times). Results showed that the combination of potassium fertilizer dosage of 9 g/plant with potassium fertilization frequency of 4 times was the best treatment combination for fruit weight per plant, with an increase of 114% compared to the combination of potassium fertilizer dosage of 3 g/plant and potassium fertilization frequency of 2 times.
Analog Rice from Pedada Fruit Composite Flour as Functional Food with Low Glycemic Index Ayuningtyas, Diella Trisna; Saraswati, Avina Rachma; Jariyah, Jariyah
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.v14i6.2157-2163

Abstract

This study aims to determine the effect of composite flour proportion pedada fruit, white corn, and soybean flours as well as the addition of GMS on the physicochemical and organoleptic properties of analog rice as functional food that is safe for people with Diabetes Mellitus. This study was arranged in a factorial completely randomized design consisting of two factors with nine treatment combinations and three replications. Factor 1 was the proportion of flour materials pedada fruit-white corn-soybean (5%-75%-20%, 10%-70%-20%, 15%-65%-20%). Factor 2 was GMS addition (1%, 2%, 3%). The data was analyzed using ANOVA at the 5% level and continued with the Duncan Multiple Range Test (DMRT). The results showed that the best treatment was the A1B1 formulation consisting of 5% pedada fruit flour, 75% white corn flour, 20% soy flour and the addition of 1% GMS produced analog rice with organoleptic characteristics of color getting a value of 3.48 (like), aroma 2.92 (neutral), texture 2.76 (neutral), and taste 3 (neutral), antioxidant content of 47.73%, in vitro glycemic index of 42. The results of the RVA analysis showed that formulation A1B1 had a pasting temperature of 94.8°C, peak viscosity 184 cP, hold viscosity 183 cP, final viscosity 332 cP, breakdown 1 cP, setback 149 cP.
Preservation and Packaging Methods to Extend the Shelf Life of Fresh Lontar (Borassus flabellifer L.) Pulp Sasmito, Dewi Pratiwi; Darmawati, Emmy; Rokhani
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.v14i6.2206-2215

Abstract

Lontar is a palm with fruits having a various important biomolecules containing proteins, carbohydrates, vitamins, and minerals, which are beneficial to human health. The shelf life of lontar fruit pulp is generally limited to approximately 1–2 days. The objective of this study was to analyze the effect of water amount and citric acid concentration combining with packaging types and temperature ranges on the quality of fresh lontar fruit pulp and the shelf life of the pulp. The research used Response Surface Methodology with a Central Composite Design as the design model to find the best combination of water and citric acid concentration. The selected combination was applied in preservation treatment with polypropylene and nylon packaging under storage temperatures of 15 °C and 25–28 °C. The quality parameters observed included brightness, hardness, pH, and total dissolved solids, as well as organoleptic tests. The optimization results indicated that the optimal ratio of water to citric acid concentration was 40 ml to 0.2%. Cold storage significantly extended the shelf life of lontar fruit pulp to 6 days, compared to just 3 days at room temperature. The organoleptic test results showed that PP packaging received a higher level of favorability compared to nylon packaging.
Effect of Azotobacter sp. and Cow Manure on Nitrogen Availability in Saline Soil, Root Length, and Vitamin C Content of Tomato Aisyah, Aulifia Nisak; Priyadarshini, Rossyda; Siswanto, Siswanto
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.v14i6.2111-2119

Abstract

Nitrogen is a macronutrient for plants, but its availability in saline soil is a limiting factor, making it difficult to cultivate plants. This study aims to examine the effect of the combination of Azotobacter sp. and cow manure in increasing the available N of saline soil, and to obtain the best combination in increasing the growth of tomato plants in saline soil. This research was conducted in the greenhouse and laboratory of UPN "Veteran" Jawa Timur. Saline soil samples came from the Wonorejo Mangrove land, Surabaya. Azotobacter sp. isolates came from the roots of Wonorejo mangrove trees. The study used a Completely Randomized Design with 2 factors with 3 replications. First factor was addition of Azotobacter sp., consisted of A0 (no addition of Azotobacter), and A1 (addition Azotobacter at 107 CFU/mL. Second factor was cow manure (K) involved 4 levels (in ton/ha): A0 (0); K1 (20); K2 (30); K3 (40). The results of this research showed that application of Azotobacter sp. and cow manure affected the parameters of available N, EC, pH and vitamin C content, but did not affect the parameters of plant root length. Combination of Azotobacter 107 CFU/mL + 40 tons/ha of cow manure produced the best available N of 246.48 ppm. The highest vitamin C content was 36.75 mg/g in the treatment of 107 CFU/mL Azotobacter + 30 ton/ha of cow manure. Cow manure decreased soil EC and increased soil pH.
Effect of Drying and Size Reduction Techniques on the Characteristic of Instant Seasoning for Shredded Fish Julita, Sela; Sartika, Dewi; Akhyar, Gusri; Hidayati, Sri; Subeki, Subeki
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.v14i6.2120-2130

Abstract

Instant seasoning for spiced shredded fish is practical and serves to expedite the process of producing shredded fish products. Instant seasoning has a potential to be developed and needs to be studied because it has not been found in the nearest supermarket. The objective of this study is to analyze and evaluate the quality of instant seasonings produced using various drying and size reduction techniques. The research was performed according to Completely Randomized Block Design, comprising two factors (i.e. drying techniques and size reduction techniques) and three replicates. Data was analyzed using the LSD (Least Significant Difference) and de Garmo tests to determine the most effective treatment. Seasoning quality was based on sensory attributes, chemical parameters, and microbiological parameters. The findings indicated that the application of drying and size reduction techniques had a discernible impact on the quality of instant seasoning for spiced shredded fish. The P3A1 (drying using food dehydrator and size reduction using chopper) treatment was determined to be optimal with 5.27% moisture content of, 8.57% fiber content, 42.88% free radical inhibition activity, 2.42 log CFU/ml total microbes, and 4.16 of score for overall acceptance.
Design of an Automatic Temperature and Humidity Control System Prototype for Rice Seedling Nursery Soekarno, Siswoyo; Widarman, Dwi Wahyu; Putra, Bayu Taruna Widjaja; Tasliman, Tasliman
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.v14i6.2102-2110

Abstract

Temperature and humidity control in rice nurseries is carried out to maintain the quality of rice seeds and avoid planting failure. Control is carried out using a prototype automatic device equipped with a water pump for watering and a mist maker plus a fan for humidifying. Based on observations, the prototype tool operates according to the given program. The water pump will turn on when the time shows 07:00 a.m. and 02:00 p.m. Meanwhile, the mist maker plus fan will turn on according to the regulated temperature and humidity conditions and can be applied to several regions in Indonesia. However, at the research site it will turn on when the temperature is > 27 °C and the humidity is < 70% and will turn off when the temperature reaches 27 °C and the humidity is 86%. The optimal air temperature for rice growth ranges from 19–27 °C with humidity in the RH range of 70–86%. Observations were carried out in two treatments, namely conditions with control and conditions without control. The results of seedling with control are better than without control. This can be seen from the growth of rice seedlings with control having a higher value than rice seedlings without control.
Growth Improvement of Palm Oil Seedling using Biochar from Oil Palm Empty Fruit Bunch and Rubber Wood Prayoga, Seldi; Riniarti, Melya; Prasetia, Hendra; Setiawan, Kukuh; Bakri, Samsul; Hidayat, Wahyu
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.v14i6.2179-2186

Abstract

Agricultural wastes biochar can be used to support the growth of oil palm seedlings. This study aims to assess the effectiveness of biochar pellets made from oil palm empty fruit bunches (OPEFB) and rubber wood wastes on the growth of oil palm seedlings. The research was conducted in the greenhouse using a factorial complete randomized design with two treatment factors, namely the type of biochar pellets (OPEFB and rubber wood) and doses of 0%, 5%, 10% with 10 replications. Observation included plant height, stem diameter, number of leaves, and total dry weight. The results showed that biochar pellet application had a significant effect on plant growth, especially at a 10% dose, which increased plant height, stem diameter, number of leaves, and dry weight compared with the control. The 10% dose of OPEFB biochar pellet produced a plant height of 21.4 cm, stem diameter of 3.64 cm, and number of leaves of 8 strands, while the same dose of rubber wood biochar pellet produced a height of 15.67 cm, diameter of 3.64 cm, and number of leaves of 6.67 strands. OPEFB biochar pellet showed higher results than rubber wood biochar, but at the same dose, the difference is minor. These results indicate that biochar pellets from agricultural waste have the potential to effectively support the growth of oil palm seedlings in an environmentally friendly manner.
Investigation of Drying Time and Final Moisture Content of Arabica beans in a Solar Drying Chamber Ramdhani, Rendi; Septianissa, Selly; Rajani, Ahmad
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.v14i6.2239-2249

Abstract

Drying is a critical stage that affect directly the quality, storability, and market value of Arabica coffee beans. The objective of this study was to investigate the performance of a solar drying chamber integrated with a thermal collector and phase change material (PCM), operated under a constant airflow velocity of 9.2 m/s. Arabica beans of 1500 g were dried over two observation days, with chamber temperatures ranging from 40 °C to 46.5 °C and peak solar radiation of 1122 W/m². The results showed that the system effectively maintained thermal stability and drying performance despite fluctuations in solar input. The analysis revealed at Day 2 achieved a higher and faster moisture reduction due to improved solar conditions and absorber efficiency, with drying rates peaking at over 42 g vapor per hour in the third hour. In contrast, at Day 1 the drying rate peaked in the third hour at approximately 22.45 g vapor/h. Day 1 exhibited a more stable but slower drying trend. Overall, the system successfully reduced the beans’ moisture content to below 12.8% in within under 14 hours, with Tray 2 delivering the most consistent results. These findings demonstrate that the integration of solar thermal energy, PCM, and forced convection application significantly improved drying efficiency and reliability, offering a sustainable alternative for post-harvest processing, especially in regions with variable weather conditions.
Flood Mitigation Priority Strategy to Reduce Community Vulnerability in the Downstream Area of the Setail Watershed, Banyuwangi Nurbaskoro, Gigik; Indarto; Novita, Elida; Sujarwo, Mohamad Wawan
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.v14i6.2216-2228

Abstract

Floods that repeatedly occur in the downstream area of the Setail Watershed have caused significant damage to infrastructure, community livelihoods, and social systems in the region. This condition demands the implementation of effective and sustainable mitigation strategies to reduce flood risks and impacts. This study aims to determine priority flood mitigation strategies to reduce community vulnerability in the downstream area of the Setail Watershed. The identification of mitigation criteria was first conducted through interviews with flood-affected communities to capture relevant local factors. These criteria were then discussed with disaster mitigation experts and stakeholders, and the results of the questionnaires were analyzed using the Analytical Hierarchy Process (AHP) method to evaluate and rank the mitigation strategies. The results show that the three main priority strategies are flood risk mapping with a score of 0.22, community education and awareness with a score of 0.18, and zoning and spatial planning with a score of 0.15. These strategies are expected to serve as the basis for the preparation of local government action plans to minimize future flood impacts and enhance community resilience and well-being.
Mathematical Modeling for Climate-Based Optimization of Rice Planting Schedules Dawud, Moh Yusuf; Masahid; Abryandoko, Eko Wahyu
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.v14i6.2285-2296

Abstract

The stability of rice production is greatly influenced by the dynamics of climate variability that changes rapidly and is unpredictable. This study developed a climate-based planting scheduling model that utilizes daily climate data and annual production data for the period 2016–2024. The predictive model was built through multiple linear regression to examine the effects of temperature, rainfall, humidity, and wind speed on crop yields and ARIMA to project climate and rice production until 2029. Data were obtained from BMKG, BPS, and related regional agencies, then processed to produce an adaptive planting schedule. The regression results showed high accuracy with R² = 0.99, Adjusted R² = 0.961, MAE = 5.980, and RMSE = 6.770. Rainfall showed a negative effect (p = 0.025) on rice production. The optimization model produced the two most profitable planting months each year and provided more stable yields than conventional planting patterns. Five-year production projections show fluctuations influenced by climate conditions, including a sharp decline in 2027 and a rebound in 2029. The development of an adaptive schedule model allows for alternative decision-making in areas vulnerable to climate change.

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