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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 1,078 Documents
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PENGARUH SISTEM OLAH TANAH DAN PEMBERIAN HERBISIDA TERHADAP ALIRAN PERMUKAAN DAN EROSI PADA FASE GENERATIF TANAMAN SINGKONG (Manihot utilissima) Nanda Catur Pamungkas
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 5, No 1 (2016)
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.357 KB)

Abstract

Aliran permukaan dan erosi merupakan penyebab kerusakan tanah yang paling besar akibatnya.  Curah hujan merupakan faktor yang paling berpengaruh terhadap terjadinya aliran permukaaan dan erosi.  Jika intensitas hujan melebihi kapasitas infiltrasi tanah atau telah melewati titik jenuhnya, maka sebagian besar kelebihan air tersebut akan mengalir menjadi aliran permukaan dan aliran tersebut akan menyebabkan terjadinya erosi.  Penelitian ini bertujuan untuk mengetahui pengaruh sistem olah tanah dan pemberian herbisida terhadap aliran permukaan dan erosi pada fase generatif tanaman singkong.  Penelitian ini menggunakan Rancangan faktorial 2x2, dengan menggunakan 4 kali ulangan. Faktor pertama adalah sistem olah tanah yaitu pengolahan tanah minimum (M) dan pengolahan tanah penuh (F).  Faktor kedua yaitu pemberian herbisida (H1) dan tanpa pemberian herbisida (H0).  Pengukuran aliran permukaan dan erosi dilakukan dengan menggunakan metode petak kecil dengan ukuran 4x4 meter.  Pengolahan tanah tidak nyata mempengaruhi aliran permukaan dan erosi.  Pemberian herbisida nyata mempengaruhi erosi yang terjadi, tetapi tidak nyata mempengaruhi aliran permukaan.  Pengolahan tanah dan pemberian herbisida tidak nyata mempengaruhi tinggi tanaman, diameter batang, dan produksi umbi singkong. Kata Kunci:  sistem olah tanah, herbisida, aliran permukaan, erosi
ANALISIS DIFUSI LARUTAN PUPUK MELALUI DINDING MORTAR ARANG SEKAM PADI Dian Fajar Lestari; Ahmad Tusi; Muhamad Zen Kadir
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 5, No 3 (2016)
Publisher : The University of Lampung

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Abstract

The aim of this reasearch is to determine difussion coefficient of nutrient solution through rice husk charcoalmortar walls. This research used completely randomized design (CR) with factorial arrngement which consistedof factors. The first factor, the material composition ratios of mortars (cement : sand : rice husk charcoal),consisted of two levels: P 1 (1:3:3) and P 2 (1:3:4). The second factor, the concentration of nutrient consisted ofree levels, namely K 1 (3 mS/cm), K 2 (6 mS/cm), and K 3 (9 mS/cm). Data set was analyzed by using ANOVA,then followed by using LSD at 5% significant level. Anova showed that there was interaction between mortarmaterial composition and nutrient concentration. The best diffusion coefficient was found in the treatment P 2 K 1and P 2 K 2 (1:3:4 and the nutrient concentrations 3 mS/cm, 6 mS/cm). Nutrient solution in the treatments couldpass through the walls of mortar very well, so that it could be used as a means of fertigation.Keywords: Fertigation, Diffusion, Nutrient Solution, and Rice Husk Charcoal Mortar.
PHYSIOLOGY CHARACTERISTICS OF MANGOSTEEN (Garcinia Mangostana L.) AT MODIFIED ATMOSPHERE CONDITION Andre Fransiska; Rofandi Hartanto; Budianto Lanya; Tamrin -
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 2, No 1 (2013)
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (565.316 KB) | DOI: 10.23960/jtep-l.v2i1.%p

Abstract

Mangosteen is a klimateric fruit so it has a short shelf life.  Therefore,  it is needed to handle carefully after harvesting.  Temperature setting combined with modified atmosphere is a type of storage which can decrease the respiration rate of fruit.  This research aims at determining the effect of modified gas composition on total dissolved solids, total acid, hardness, respiration rate, and shelf  life of mangosteen in the cold temperature and the room temperature storage. The research was carried out at room temperature (29 oC) and cold temperature (10 oC) combined with a gas composition of pure CO2 gas and air from a compressor containing O2 and N2 supplied to the storage bottle with composition of A (5% O2, 5% CO2), B (10% O2, 5% CO2), C (5% O2, 10% CO2), D (10% O2, 10% CO2). Total dissolved solid of mangosteen during storage was decreased, with the lowest  total dissolved solids was 16,6 obrix in the cold storage and 16,7 obrix at room temperature storage.  Total acid and respiration rate of mangosteen was stable decresed during storage. The hardness of mangosteen during storage increased with the highest value of 3,20 kg.s/mm. Mangosteen optimal shelf life at room temperature (29 oC)  was 16 days and at cold temperatures (10 oC)  was 20 days with gas composition of 5% O2 and 10% CO2. Modified atmosphere combined with temperature could extend the shelf life of mangosteen and influened the value of total dissolved solids, total acid, respiration rate and hardness. Keywords: Mangosteen, respiration, climateric, shelf life
RANCANGBANGUN DAN UJI PERFORMANSI SINGLE STIRRING REACTOR (SSR) PUTARAN SEARAH PADA BERBAGAI RPM UNTUK PRODUKSI BIODIESEL furqon, Furqon; Ritonga, Abdul Mukhlis; Maksum, Ali
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 1 (2018): April
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.423 KB) | DOI: 10.23960/jtep-l.v7i1.9-14

Abstract

Produksi biodiesel dengan metode katalitik membutuhkan sistem pengadukan agar trigliserida dan metanol yang mempunyai sifat tidak saling bercampur dapat bercampur dengan baik. Aplikasinya sebagian besar produksi biodiesel masih menggunakan beberapa reaktor dan menggunakan putaran tinggi. Oleh karena itu, akan lebih baik jika proses produksi biodiesel menggunakan satu reaktor sebagai tempat terjadi reaksi tersebut dan menggunakan putaran yang tidak terlalu tinggi sehingga lebih efisien dalam penggunaan energi. Oleh sebab itu, tujuan dari penelitian ini adalah merancang single stirring reactor (SSR) pada putaran searah dan menguji performansi SSR putaran searah. Rancangbangun SSR dilakukan dengan melakukan tahapan perancangan dan perhitungan analisis teknik. Alat yang dibuat merupakan tipe batch dan skala laboratorium. Alat yang dibuat diujicoba saat tanpa beban dan dengan beban yaitu dengan memproduksi biodiesel menggunakan bahan minyak kelapa sawit, metanol dan katalis KOH. Hasil biodiesel (metil ester) dianalisis dengan GC-MS (Gas Chromatography-Mass Spectrometry). Hasil perancangan alat SSR mempunyai dimensi tabung reaktor tinggi 400 mm, diameter 150 mm dan tebal 1 mm menggunakan bahan Stainless steel 304. Hasil pengujian mendapatkan alat mampu bekerja dengan baik sesuai performansi yang diharapkan, baik dengan beban maupun tanpa beban. Hasil uji performansi alat SSR putaran searah saat memproduksi biodiesel dengan bahan minyak kelapa sawit dan metanol (rasio 1:6), katalis KOH 0,5%, suhu 45 oC, dan waktu 30 menit pada putaran 200 rpm, 350 rpm, dan 500 rpm berturut-turut menghasilkan kadar metil ester 98,89%, 99,55%, dan 99,50%, yang berarti sudah memenuhi syarat mutu biodiesel berdasarkan SNI 7182:2015.
DESIGN OF SOLAR THERMAL COLLECTOR TOOL WITH THERMOSIFON SYSTEM Rahman, Mulia; Lanya, Budianto; ., Tamrin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 2, No 2 (2013)
Publisher : The University of Lampung

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Abstract

Limited availability of fossil energy requires us to find for alternative energy to meet our needs. Solar thermal collector with thermosifon system is one of environmentally friendly alternative energy. The thermosifon system is a natural pump which work based on density difference between cool water and hot water, so that no electric pump is needed. The purpose of this research was to create a mean of collecting solar thermal energy with thermosifon system. The research steps consist of designing, manufacturing, and testing. Thermal collector was made with dimension of 1,5 m long, 1,0 m wide and 1,0 m high, with storage tank capacity of 20 lt.  Collector testing was conducted by putting the equipment at an open space from a clock 08:00 – 16:00. It was found that the highest efficiency of solar collector (11,2 %) occurred on July 11, 2012 with an average solar intensity of 756 W/m2, where as the lowest efficiency  (8,8 %) occurred on July 7, 2012, with the average solar intensity 479 W/m2. The highest average temperature of the storage tank was 44,7 ºC on July 13, 2012 while the lowest average temperature was 35,3 ºC on July 12, 2012. Keywords: Solar Collector, Thermosifon, Radiaton Intensity, Thermal Efficiency
MODIFIKASI MESIN PENIRIS MINYAK DAN KELAYAKAN FINANSIAL PRODUKSI KERIPIK BAYAM Ahmad Thoriq; Totok Herwanto; Drupadi Ciptaningtyas
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 2 (2018): Agustus
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1030.391 KB) | DOI: 10.23960/jtep-l.v7i2.63-71

Abstract

Spinach chips is one of the snack products with the main ingredients of fried spinach using flour. The quality of spinach chips is influenced by the amount of oil contained in spinach chips. The use of spinner machine is proven to reduce or eliminate the oil content quickly and improve the quality of the product but the spinner machine available on the market can not be used to drain the oil contained in spinach chips because the rotational speed in the setting of more than 400 rpm can cause damage to spinach chips . This study aims to modify the spinner by lowering the speed of rotation and do the financial feasibility analysis of spinach chips production. The method used in this research is through the approach of engineering design and financial feasibility. The design approach consists of problems identification, formulation of modification concept, functional and performance test while some parameters calculated in financial feasibility analysis are: cost of production (HPP), net present value (NPV), benefit cost ratio (BCR), internal rate of return (IRR), and payback period (PBP). The results showed a decrease in rotational speed from 532.50 rpm to 258.18 rpm was proven to be able to remove the oil content on spinach chips and avoid the damage of spinach chips from 50% to no broken spinach chips. At production capacity of spinach chips 150 kg / month obtained cost of production amounted to Rp. 43,087 / kg. When spinach chips sold at market price Rp.50,000 / kg obtained NPV of Rp. 15,088,782/ month, BCR of 1.10, IRR of 12% and capital will return in the eigth month.
UJI KINERJA ALAT PENGERING HYBRID TIPE RAK PADA PENGERINGAN CHIP PISANG KEPOK Ika Novita Sari; Warji .; Dwi Dian Novita
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Lampung Province was one of the banana production centers areas in Indonesia, one of them is kepok banana.  Bananas don't have a long shelf life, so that it needs an alternative treatment to prolong shelf life so it can provide the value-of banana fruit.  Drying system with hybrid is an alternative option. The purpose of this study is to test the performance of the hybrid dryer shelves type for drying banana chips.  This research was conducted with three treatments, they were drying using solar energy, drying using electrical energy, and drying using solar energy and electricity, which was using 5 kg banana chips for each treatments.  The three treatments of this research showed different results.  It took 9 hours to drying banana chips until it reached the water content 10%-12% on drying using solar energy, while drying using electrical energy needed 11 hours, and 8 hours on drying using solar energy and electricity.  Energy produced on drying using solar energy amounted to 55859,52 kJ, drying using electrical energy amounted to 27680,4 kJ and drying using solar energy and electricity was 64417,17 kJ. Keywords: Kepok banana chips, drying, the shelves type hybrid dryer
STUDY EFFECT OF IRRADIATION 0.75 kGy DOSE ON CHILLING INJURY SYMPTOMS OF MANGO cv GEDONG DURING STORED Sugianti, Cicih -
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 2 (2014)
Publisher : The University of Lampung

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Abstract

Low temperature storage may cause mango experience the chilling injury. Study on the chilling injury symptoms of mango stored under low temperature storage and effect on mango irradiated 0,75 kGy will be very important in order to understand better method to reduction of chilling injury. This research objective was to study the effect of irradiation gamma rays on the chilling injury symptopms of mango fruits stored at 8, 13°C and room temperature. The quality of mango during storage were evaluated from the changes in respiration rate, firmness, weight loss, total soluble solid,   total acid and pH. The result showed that mango fruits experienced chilling injury at storage condition of 8°C. The chilling injury symptoms  was showed by the mango of control. This phenomenon of chilling injury symptoms at 8°C was also indicated by quality parameter. The mango of irradiated can reduced of chilling injury symptoms.Keyword: Mango cv Gedong, Irradiation, Chilling Injury.
TEST PERFORMANCE OF FORAGE CHOPPER VERTIKAL WONOSARI TYPE I Fadli, Ihwan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 4, No 1 (2015)
Publisher : The University of Lampung

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Abstract

This research aimed at testing performance of forage chopper verticalWonosari type I by observation coveringuniformity, capacity ofmachinework, and consumptionfuel. Research located inSumberrejo village, subdistrictof Batanghari, district of Lampung Timur which began in months Juny – Agustus 2014. Themethod usedwas aCompletely Randomized Design (CRD) with two factorial. The first factor is the three engine speeds with levels(800, 1400 and 1800 rpm), while the second factor is combined of feed freshness (fresh, withered a day andwithered twodays). Every treatmentwere repeated three times so the total thereare 27 treatment. Parameter thatwas statistically tested is uniformity of 2 – 5 cmchopped size then continued by F test, LSD 5%and 1%. The resultsshow that the chopped size 2 – 5 cm most be obtained at the speed 1400 rpmfor fresh corn stalks and withereda daywith the 32.19%and 39.69%percentage,while thewithered corn stalks two days using the speed 1800 rpmwith 30.12% percentage. The results of analysis of variance calculation shows that the uniformity of choppedsize 2 – 5 cm was different. The work capacity of themachine at speed of 1400 rpm was 834 kg/hour with the2.17 liters/hour consumption fuel.Keywords:Capacity, Chopper,Chopped size,Fuel consumption,The performance test
THE EFFECT OF EVAPOTRANSPIRATION DEFISIT 0N WATER PRODUCTIVITY AND GROWTH OF SOYBEAN PLANTS (Glycine max L. Merrill) Wijaya, I Ketut Adi Putra
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 4, No 3 (2015)
Publisher : The University of Lampung

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Abstract

Soybean is an efficient source of vegetable protein. National soybean production continues to decline during2010-2012. The lowproductivity of soybean is one of them caused by drought stress. Therefore, it is necessary touse cultivation techniques which can improve the efficiency of water use, ie with deficit irrigation. Deficitirrigation can be evaluated by calculating the amount of crop water productivity. The purpose of the research isto calculate andcompare themagnitude of cropwater productivity andgrowth of three varieties of soybeanplantsin each treatment evapotranspiration deficit. Researchwas conducted in September 2014 -December 2014 in thegreenhouse of IntegratedField Laboratory and LaboratoryofWaterResourcesand LandDepartment ofAgriculture,University of Lampung.The experimentwas conducted using a factorial in completely randomized design (CRD)with two factors that is soybean varieties which consists of three varieties: Kaba, Tanggamus, and Willis anddeficit ETC which consists of three levels: 1.0 x ETC, 0.8 x ETC, and 0.6 x ETC. Data were analyzed with Analysis OfVariance (Test F), then continued by LSD test at the significance level of 5% and 1%. Results showed that: (1)based on the total leaf area, Kaba and Wilis varieties of soybean plants have started stress at week 2nd in thetreatment ET2 (0,8 x ETC), varieties Tanggamus began stress on the 3rd week of the treatment ET3 (0,6 x ETC).Eventually based on the production of soybeans plant, varieties Tanggamus andKaba remains stress in treatmentET2 (0,8 x ETC) except varietiesWillis on ET3 (0.6 x ETC), (2) the crop water productivity was not significantlydifferent between treatments except treatment Tanggamus varieties ET3 deficit (0, 6 x ETC), (3) Kaba varietieshave the highest production in the amount of 20.22 grams,while the cropwater productivity of the highest of theWilis varieties is equal to 0.5 kg/m3.Keywords: evapotranspiration, deficit irrigation, soybeans

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