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Agriculture, Biological Sciences & Forestry
Jurnal Keteknikan Pertanian dengan No. ISSN 2338-8439, pada awalnya bernama Buletin Keteknikan Pertanian, merupakan publikasi resmi Perhimpunan Teknik Pertanian Indonesia (PERTETA) bekerjasama dengan Departemen Teknik Mesin dan Biosistem (TMB) IPB yang terbit pertama kali pada tahun 1984, berkiprah dalam pengembangan ilmu keteknikan untuk pertanian tropika dan lingkungan hayati. Jurnal ini diterbitkan dua kali setahun. Penulis makalah tidak dibatasi pada anggota PERTETA tetapi terbuka bagi masyarakat umum. Lingkup makalah, antara lain: teknik sumberdaya lahan dan air, alat dan mesin budidaya, lingkungan dan bangunan, energi alternatif dan elektrifikasi, ergonomika dan elektronika, teknik pengolahan pangan dan hasil pertanian, manajemen dan sistem informasi. Makalah dikelompokkan dalam invited paper yang menyajikan isu aktual nasional dan internasional, review perkembangan penelitian, atau penerpan ilmu dan teknologi, technical paper hasil penelitian, penerapan, atau diseminasi, serta research methodology berkaitan pengembangan modul, metode, prosedur, program aplikasi, dan lain sebagainya.
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Articles 632 Documents
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Pendugaan Kadar Air dan Total Karoten Tandan Buah Segar (TBS) Kelapa Sawit Menggunakan NIR Spektroskopi Zaqlul Iqbal; Sam Herodian; Slamet Widodo
Jurnal Keteknikan Pertanian Vol. 2 No. 2 (2014): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.02.2.%p

Abstract

AbstractThe aim of this research is to develop a Near Infrared (NIR) calibration model based on water content and total carotene that can be used as a standard of ripe fruit. There are three steps of the research. The first step is NIR spectral data aquisition of 60 samples by using NIRFlex N-500. Next step is measuring water content and total carotene from each sample using destructive method. The last step is development of NIR calibration model using (Partial Least Square) PLS and applying pretreatment data Standard Normal Variate (SNV), normalization (N01), dan First Derivative Savitzky-Golay 9 Point (DG1). The result show that water content could be predicted well by applying SNV with R2 (calibration) =0.89, R2 (validation) = 0.88 and RPD = 2.84. Total carotene also could be predicted well by applying DG1 with R2 (calibration) = 0.84, R2 (validation) = 0.77 and RPD = 2.06.Keywords: Fresh Fruit Bunch (FFB) maturity, NIR spectra, calibration model, water content, total caroteneAbstrakTujuan dari penelitian ini adalah untuk membangun model kalibrasi dari kadar air dan total karotenyang dapat dijadikan standar kematangan buah. Terdapat tiga tahapan pada penelitian ini, pertama akuisisi spektrum Near Infrared (NIR) pada 60 sampel menggunakan NIRFlex N-500. Langkah selanjutnya adalah pengujiankadar air dan total karoten tiap sampel secara destruktif. Langkah terakhir adalah pembuatanmodel kalibrasi menggunakan metode (Partial Least Square) PLS dan menerapkan pretreatment data Standard Normal Variate (SNV), normalisasi (N01), dan First Derivative Savitzky-Golay 9 titik (DG1). Hasilmenunjukkan bahwa kadar air dapat diprediksi dengan baik menggunakan SNV dengan R2 (kalibrasi) = 0.89 dan R2 (validasi) = 0.88 dan RPD = 2.84. Total karoten juga dapat diprediksi dengan baik menggunakan DG1 dengan R2 (kalibrasi) = 0.84 dan R2 (validasi) = 0.77 dan RPD = 2.06.Kata kunci: Kematangan Tandan Buah Segar (TBS), spektrum NIR, model kalibrasi, kadar air, total karotenDiterima: 13 Agustus 2014 ; Disetujui: 30 September 2014
Pengembangan Tungku Gasifikasi Arang Biomassa Tipe Natural Draft Gasification Berdasarkan Analisis Computational Fluid Dynamics (CFD) Erlanda Augupta Pane; Leopold O. Nelwan; Dyah Wulandani
Jurnal Keteknikan Pertanian Vol. 2 No. 2 (2014): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.02.2.%p

Abstract

AbstractA biomass stove based on natural draft gasification (NDG) has been developed in a previous study (Nelwa, et al. 2013) by using simulation based on heat transfer and equilibrium modeling. In this study, a CFD simulation was performed in order to analyze the effect of chimney height, and inlet hole diameter of the stove to the performance of the stove. The results of simulation showed that power produced by stove was between 1863.9 J/s until 2585.7 J/s, and its gasification efficiency was 67.11%. The results of simulation also showed that charcoal gasification produces combustible gases (CO, CH4, and H2) at the bottom and the center of stove, and then they were oxidized by secondary air at the top of stove. This oxidation reaction produces sufficient heat energy which can be used for cooking process.Keywords: stove, power, combustible gas, gasification efficiencyAbstrakSebuah Disain tungku natural draft gasification (NDG) telah diciptakan sebelumnya (Nelwa, et al. 2013) dengan menggunakan pemodelan dan simulasi berbasis pindah panas, dan equilibrium. Penelitian ini menggunakan simulasi computational fluid dynamics (CFD) untuk menganalisis performa tungku pada bagian geometri cerobong gas bakar, dan lubang udara sekunder. Hasil simulasi dari beberapa skenario tungku yang dilakukan dapat disimpulkan bahwa dari skenario disain tungku didapatkan daya tungku antara 1863.9 J/detik sampai dengan 2585.7 J/detik, dan memiliki efisiensi gasifikasi sebesar 67.11%. Proses gasifikasi arang kayu menghasilkan gas mampu bakar CO, CH4, dan H2, dimana gas mampu bakar tersebut mengalami reaksi pembakaran dengan aliran udara sekunder yang masuk di bagian tengah saluran gas mampu bakar. Reaksi pembakaran ini, menghasilkan energi panas yang memadai untuk proses memasak.Kata Kunci: tungku, daya, gas bakar, efisiensi gasifikasiDiterima: 02 Mei 2014; Disetujui: 15 Agustus 2014
Pengembangan Konsep Zero Runoff System (ZROS) untuk Optimalisasi Kadar Air Tanah pada Lahan Perkebunan Non Irigasi Yanuar Chandra Wirasembada; Budi Indra Setiawan; Satyanto Krido Saptomo
Jurnal Keteknikan Pertanian Vol. 2 No. 2 (2014): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.02.2.%p

Abstract

AbstractOn non-irrigated farming land, soil water content was difficult to be maintained in field capacity condition. Zero runoff system (ZROS) attempted to utilize runoff and to convert it to backup soil water content using permeation structures. The objectives of this research was to analyze the changing of soil water content before and after ZROS had been applied and to calculate ZROS effectivity towards infiltrating rainfall. In this research, permeation structures in the research field was usingsilt pit and collector canal. The changing of soil water content before and after ZROS application was calculated by water balance model in therooting zone. The simulation result showed that after ZROS had been applied, the decreasing of soil water content in research field were ranging from -0.001 to -0.009 m3/m3, while before ZROS had been appliedit were ranging from -0.01 to -0.024 m3/m3. Besides that, ZROS also capable to increase soil water content in research field for 25.57%. The increasing of this soil water content was caused by ZROS ability that canhold and infiltrate 51.04% from total rainfall occurredeffectively.Keywords: permeation structure, runoff, soil water content, water balance model, zero runoff systemAbstrakPada lahan non irigasi, kadar air tanah sulit dipertahankan pada kondisi kapasitas lapang dan sangat tergantung pada curah hujan. Zero runoff system (ZROS) berupaya memanfaatkan limpasan permukaan dan mengkonversinya menjadi cadangan air tanahdengan menggunakan bangunan resapan. Penelitian ini bertujuan menganalisis perubahan kadar air tanah sebelum dan sesudah penerapan ZROS serta menghitung efektifitas ZROS dalam meresapkan air hujan. Pada penelitian ini, bangunan resapan yang digunakan berupa rorak dan saluran pengumpul. Perubahan kadar air tanah yang terjadi sebelum dan sesudah diterapkan ZROS dihitung menggunakan model kesetimbangan air di dalam zona perakaran tanaman. Hasil simulasi menunjukkan bahwa setelah diterapkan ZROS, penurunan perubahan kadar air tanah berada pada kisaran -0.001 sampai -0.009 m3/m3 sedangkan sebelum ZROS sebesar -0.01 sampai -0.024 m3/m3. Selain itu, ZROS juga mampu meningkatkan kadar air tanah di lokasi penelitian sebesar 25.57%. Kenaikan kadar air tanah ini disebabkan oleh kemampuan ZROS yang secara efektif menampung dan meresapakan 51.04% dari curah hujan yang terjadi selama periode pengukuranKata Kunci : bangunan resapan, kadar air tanah, limpasan permukaan, model kesetimbangan air, zero runoff system.Diterima: 07 Mei 2014; Disetujui: 19 Agustus 2014
Analisis Computational Fluid Dynamics untuk Perancangan Reaktor Gasifikasi Sekam Padi Tipe Downdraft Dziad Dzulfansyah; Leopold O. Nelwan; Dyah Wulandani
Jurnal Keteknikan Pertanian Vol. 2 No. 2 (2014): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.02.2.%p

Abstract

AbstractRice husk is one of biomass type which can be utilized as gasification’s feedstock for producing combustible gas which can be used as fuel in internal combustion engine. The objective of this research was to obtain the best design of small scale rice husk gasifier from among geometry scenarios by applying computational fluid dynamics method. The geometry scenarios used in this study were angle of throat 70O, 80O, and 90O, and also angle of nozzel 10O and 20O. The softwares used in this study were Gambit 2.4.6 (meshing 3D model) and Ansys Fluent 13.0 (simulation). The reactions involved in gasification (3 heterogeneous reactions and 6 homogeneous reactions) were solved by finite rate/Eddy dissipation model.Results of simulation showed that gasifier with angle of throat 90O and angle of nozzel 10O produced the highest heating value of gas with volume fraction of CO, H2, and CH4 is 14.49%, 9.65%, and 2.39% respectively. This result showed reasonable agreement with experimental data from other researchers on rice husk gasification.Keywords: rice husk, gasification, computational fluid dynamics, combustible gasAbstrakSekam padi merupakan salah satu biomassa yang dapat dimanfaatkan sebagai bahan gasifikasi untuk menghasilkan gas mampu bakar yang dapat digunakan sebagai bahan bakar pada motor bakar. Tujuan penelitian ini adalah mendapatkan desain reaktor gasifikasi sekam padi skala kecil yang terbaik dari beberapa skenario bentuk reaktor melalui metode computational fluid dynamics. Skenario bentuk geometri reaktor adalah sudut throat 70O, 80O, dan 90O, serta sudut nozel 10O dan 20O. Perangkat lunak yang digunakan adalah Gambit 2.4.6 (pembuatan mesh model 3D) dan Ansys Fluent 13.0 (simulasi). Reaksi yang terlibat dalam proses gasifikasi (3 reaksi heterogen dan 6 reaksi homogen) diselesaikan dengan model finite rate/Eddy dissipation. Hasil simulasi menunjukkan bahwa reaktor dengan sudut throat 90O dan sudut nozel 10O menghasilkan nilai kalor gas paling tinggi dengan fraksi volume gas CO, H2, dan CH4 secara berturut – turut adalah 14.49%, 9.65%, dan 2.39%. Hasil simulasi cukup sesuai dengan data peneliti lain mengenai gasifikasi sekam padi.Kata kunci: sekam padi, gasifikasi, computational fluid dynamics, gas mampu bakarDiterima: 26 Mei 2014 ;Disetujui: 05 September 2014
Aplikasi Ice Gel pada Kemasan untuk Transportasi dan Penyimpanan Sementara Jamur Tiram (Pleurotus ostreatus) Adya Nurkusumaprama; Emmy Darmawati; Y. Aris Purwanto
Jurnal Keteknikan Pertanian Vol. 2 No. 2 (2014): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.02.2.%p

Abstract

AbstractGenerally, oyster mushroom is distributed at 11.00 a.m. until 14.00 p.m. The temperature at that time is relatively hot so it can reduce oyster mushroom quality faster. One of method to maintain the oystermushroom quality is by decreasing the temperature when distributing the oyster mushroom. Ice gel is one of alternative cooling media that can be used in decreasing oyster mushroom temperature when the mushroom distributed. The ice gel needs is depends on temperature, mushroom weight in packaging and distribution time. The aim of this research is developing ice gel cooler packaging fortransportation an oyster mushroom temporary storage. Packaging is developed for 3 kg per package oyster mushroom transportation, with mushrom temperature is 15OC and distribution time is 2.5 hour by using styrofoam box. The research shows that hours by using Styrofoam box which has 37.5 in length, 27.5 in width, 27.5 in tall and 2.75 in thickness which containing 3 ice gel can make temperature condition in packaging box become 15OC for 2 hoursKeywords: oyster mushroom, packaging, ice gel.AbstrakDistribusi jamur tiram umumnya dilakukan pada pukul 11:00 hingga pukul 14:00. Suhu lingkungan pada rentang waktu tersebut cukup panas sehingga dapat mempercepat penurunan kualitas jamur tiram. Salahsatu cara untuk mempertahankan kualitas jamur tiram adalah dengan menurunkan suhu ketika jamur tiram ditransportasikan. Ice gel merupakan media dingin alternatif yang dapat digunakan untuk menurunkan suhu jamur tiram saat ditransportasikan. Kebutuhan ice gel ditentukan oleh suhu, berat jamur dalam kemasan dan lama transportasi yang ditetapkan. Penelitian ini bertujuan untuk merancang kemasan untuk dapat mengaplikasikan ice gel untuk transportasi dan penyimpanan sementara jamur tiram. Kemasan dirancang untuk transportasi jamur tiram dengan berat 3 kg perkemasan, suhu jamur 15OC dan lama transportasi 2.5 jam menggunakan kotak styrofoam. Hasil penelitian menunjukan bahwa styrofoam dengan dimensi 37.5 x 27.5 x 27.5 cm dan tebal dinding 2.75 cm yang diisi 3 buah ice gel mampu menghasilkan suhu jamur 15OC selama 2 jam.Kata Kunci: jamur tiram, kemasan, ice gel.Diterima: 10 Juni 2014; Disetujui: 11 September 2014
Rancang Bangun Piranti Lunak Sistem Konsultasi Pemilihan Teknologi Irigasi Bertekanan Berbasis Android Mohmad Solahudin; Liyantono .; Rizky Oktavianto
Jurnal Keteknikan Pertanian Vol. 2 No. 2 (2014): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.02.2.%p

Abstract

AbstractSelection of appropriate irrigation system for cultivation process is to save water in agriculture by increasing the water use efficiency to avoid wastage in use of water for irrigation. Selection of irrigation system is based on the total water needs for irrigation, irrigation schedule, and the availability of irrigation system. This system developed to assist users in selecting the appropriate irrigation technology based on their crop and land conditions. This software is built on android-based operating system. This systemdeveloped using Waterfall models as approach model. The software input consist of details cultivation information plan furthermore that input used for analysis of total water needs for irrigation and hydraulics components requirement. This system displays the analysis results of irrigation water requirements and irrigation hydraulics components requirement successfully. This analysis results can be use by the user as a recomendation for selecting appropriate irrigation technologies.Keywords: software, irrigation technologies, androidAbstrakPemilihan teknologi irigasi yang tepat dalam proses budidaya tanaman merupakan salah satu cara untuk melakukan penghematan air dalam bidang pertanian dengan meningkatkan efisiensi penggunaan air. Pemilihan teknologi irigasi ini dilakukan berdasarkan pada kebutuhan air irigasi, jadwal pemberian air irigasi, serta ketersediaan teknologi irigasi di pasaran. Piranti lunak yang dikembangkan merupakan salahsatu media yang diharapkan dapat membantu pengguna dalam memilih jenis teknologi irigasi yang sesuai dengan komoditas dan kondisi lahan yang dimiliki. Piranti lunak ini dibangun pada perangkat berbasisandroid. Tahap pengembangan sistem dilakukan dengan menggunakan metode pendekatan Waterfall model. Dalam penggunaan piranti lunak, dibutuhkan input dari pengguna berupa detail budidaya yang untuk selanjutnya digunakan dalam analisis penentuan kebutuhan air irigasi dan kebutuhan hidrolika. Piranti lunak ini berhasil menampilkan hasil analisis kebutuhan air irigasi dan kebutuhan hidrolika irigasi untuk pemberian irigasi harian sesuai dengan hasil pengujian yang telah dilakukan. Hasil analisis ini dapat digunakan oleh pengguna sebagai pertimbangan untuk melakukan pemilihan teknologi irigasi yang sesuai.Kata kunci: piranti lunak, teknologi irigasi, androidDiterima: 19 Juni 2014 ;Disetujui: 22 September 2014
EFEKTIFITAS KOMBINASI PENGHANGAT AIR TERKENDALI PADA SISTEM RESIRKULASI AIR UNTUK PEMBENIHAN IKAN Mochamad Bagus Hermanto; Budi lndra Setiawan; Rudiyanto Rudiyanto
Jurnal Keteknikan Pertanian Vol. 21 No. 1 (2007): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.1.%p

Abstract

ABSTRACT Efficacies in hatchery depend on the ability to control water temperature. The aim of this research is to reduce heat loss in hatchery room, so that the energy requirement for water warming will be more efficient. Two units of flat plate solar collectors were serially installed. On-off controller is used to control a fan which is used for air re-circulation in 6m x 4m x 3m closed room. Experiments were carried out to find effectiveness of solar collector as a controlled warmer unit by perceived both temperature and relative humidity parameters. Initial  experiment results indicate that solar collector as a warmer unit is able to  give mean room temperature with tow standard deviation. The statistical analysis results also indicate that the mean water temperature at the controlled air re-circulation system with circulating water is equal to 27. 6 0C with standard deviation equal to 0.7 0C. Additional 350 Watt of electric water warmer can increase the mean water temperature that is equal to 30.6 0C with standard deviation equal to 0.5 0C  which is an ideal environment for fish hatcher. It concludes that the combination of solar collector and electric water warmer as a controlled warmer unit is able to give  mean water temperature with low standard deviation, so that this system can effectively reduce the use of warming energy cost until 76.85 %. Diterima:  1 Ncpemoer 2006: Disetujui: 20 Nopember 2006
RANCANGAN HIDROLlKA IRIGASI TETES UNTUK TANAMAN SEMANGKA DI LAHAN KELOMPOK TANI SEROPAN MAKMUR, KABUPATEN GUNUNG KIDUL, D.I. YOGYAKARTA Prastowo Prastowo; S. Hardjoamidjojo; Y. K. Awang
Jurnal Keteknikan Pertanian Vol. 21 No. 1 (2007): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.1.%p

Abstract

ABSTRACT Hydraulic design of trickle irrigation sub unit is very important to achieve high irrigation uniformity and efficiency of its schemes. The sub unit is a pipeline in a trickle irrigation block which is consists of a manifold line, some laterals and emitters. The hydraulic criteria has been used in the design of trickle irrigation scheme for water melon (Citrullus vulgaris L.) at an existing pipeline system of surface irrigation scheme in Seropan Area, Yogyakarta. The hydraulic criteria includes pipeline hydraulics of lateral and manifold, system capacity, and total dynamic head. The number and size of sub unit has been designed, and the head losses (hf) at lateral and manifold were ≤ 11% and ≤ 9% of emitter operating pressure (Ha) respectivel. Theoritically,  variation of emitter discharge will vary at 1.16-1.61%. Diterima: 2 Januari 2007; Disetujui: 30 Januari 2007 
PERENCANAAN MANAJEMEN ASET IRIGASI (PMA): PENGEMBANGAN KONSEPSI DAN IMPLEMENTASINYA DI INDONESIA Sigit Supadmo Arif; Abi Prabowo; Anjar Suprapto; Judy Kurniawan
Jurnal Keteknikan Pertanian Vol. 21 No. 1 (2007): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.1.%p

Abstract

ABSTRACT The Government of Republic Indonesia had positively responded the emerging of new paradigm on irrigation management. Government Act No. 7/2004 on water resources as well as tile new Government Regulation No. 20/2006 on irrigation state about concept on good governance in management of water resources as well as irrigation management. One of implementation of the concept is application of irrigation management asset. The Department of Agricultural Engineering, Gadjah Mada University. Yogyakarta had been developed the concept of irrigation asset management plan since 1995. This paper aims to discuss the concept development and its implementation in several irrigation systems in Java. Even though some constraints were also found, in some extend the implementation of irrigation asset management plan could help the management of irrigation system in providing several information in transparent way to all stakeholder especially farmers. Diterima: 15 Pebruari 2007; Disetujui: 4 Maret 2007 
ANALlSIS SUDUT DATANG RADIASI MATAHARI UNTUK PENGEMBANGAN MODEL PINDAH PANAS PADA RUMAH KACA DI DAERAH TROPIKA Herry Suhardiyanto; Yudi Chadirin; Titin Nuryawati; Yayu Romdhonah
Jurnal Keteknikan Pertanian Vol. 21 No. 1 (2007): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.1.%p

Abstract

ABSTRACT A heat transfer model has been developed for a naturally ventilated greenhouse under the tropical climatic conditions. In the tropical region, greenhouses are characterized by high exposure in solar radiation and air exchange through natural ventilation. Therefore in this research, incident angle of solar radiation on the greenhouse roof surface has been considered as an important factor to improve the accuracy in calculating the radiation received by the greenhouse. The heat transfer model consists of four layers represent the cover, inside air, floor surface and soil layers of the greenhouse. The model was applied to a naturally ventilated standard-peak greenhouse. A computer program was developed to predict the temperature of the inside air. Incident angle of direct solar radiation on roof surface and outside microclimate parameters data were used as the input values. Heat transfer equations were solved by using the Runge-Kutta Method while the angle of direct solar radiation with the roof surface was calculated by using the principles of geometry. Results show that the model performed well in predicting the temperature of the inside air as compared to that of the measure value.Diterima:  4 Januari 2007; Disetujui: 26 Pebruari 2007

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