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INDONESIA
Jurnal Keteknikan Pertanian
Published by Institut Pertanian Bogor
ISSN : 24070475     EISSN : 23388439     DOI : -
Core Subject : Agriculture,
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.
Arjuna Subject : -
Articles 632 Documents
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Instrument Design and Measurement of Dielectric Properties Within Radio Frequency Range . Harmen; Armansyah H. Tambunan; Edy Hartulistiyoso; I Dewa Made Subrata
Jurnal Keteknikan Pertanian Vol. 15 No. 2 (2001): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.015.2.%p

Abstract

Dielectric properties indicated the ability of a system to store, transmit anf reflect electromagnetic wave energy. Recently, the utilization of the properties in agriculture field tends tio increase. For example, dielectric drying of biological material is based on the product's ability to absorb electromagnetic radiation and convert inyo heat. In addition, lower energy application of the property can be utilitized for non-destructive measurement of water content.For a more broed application, measurement of the property anf the influencing factors is indispensable.
Application of Image Processing and Artificial Neural Network Technologgy for Predicting the Water and Nutrient Status during the Groeth of Read Chili Plant I Dewa Made Subrata; . Suroso; . Dwinanto
Jurnal Keteknikan Pertanian Vol. 15 No. 2 (2001): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.015.2.%p

Abstract

The objective of this research is to predict the water and nutrient status during the growth of red chili plant by means of an image processing and artificial neural network algorithm. In this study, about 150 chili plants were cultivated at LeuwiKopo's Greenhouse but only 30 plants were chosen as sampbs. The data were collected using a CCD Camera only during the vegetative growth and the collected data were analyzed using a back propagation artificial neural network. The results showed the linear relationship between the predicted and targetvalues of water with a coefficient determination of 0.728 and 0.973 for the training and validation data, respectively. The linear relationships were also found between the predicted and target values of nutrient with a coefficient determination of 0.716 and 0.963 for the training and validation data, respectively
Design of the Prototype Instrument for Measuring Freshness of Fish Based on Resistance I Dewa Made Subrata; Bustani Ibrahim; Anna C. Erungan; Steven G. Tunas
Jurnal Keteknikan Pertanian Vol. 15 No. 2 (2001): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.015.2.%p

Abstract

The freshness of the dead fish is very difficult to be known visually whereas the use of chemical analyses is not only time consuming but also is not readily available at for market. Therefore, it is considered necessary to find out a newmethod for that purpose. In this. research, a prototype instrument for measuring freshness of the dead fish was designed based on the fish electrical resistance. The sensor was made of a couple of steel wires with diameter of 0.5 mm. During measurement, the wires sensor was inserted into the fish body with the distance of 2 cm to each other. Result of the research showed linear relationship between dead fish freshness and its resistance. The linear relationship was also found between water content of the fish body and its resistance.
Application of Monte Carfo Simulation Method for Forecasting Discharge of a Stream Flow . Oktafri
Jurnal Keteknikan Pertanian Vol. 15 No. 2 (2001): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.015.2.%p

Abstract

Discharge of a stream flow is one process in hydrologic cycle. Fluctuation of discharge - directly or indirectly - is more affected by rainfall intensity. Because rainfall intensity is dependent on weather (climate), discharge will be fluctuated dependent on change of weather (climate). In a long period (for example 10 years), data of discharge will become a data series. A data series of discharge is a stochastic data. There are two aspects in a data series, i.e. probability aspect and time aspects. A data series can be simulated with based on stochastic concept. One of the methods that can be used is Monte Carlo Simulation Method. Furthermore, in this paper will be exposed the resuff of accurateness of Monte Catlo Simulation Method to simulate data series of discharge. Mean weekly data series of discharge of Cikapundung stream flow (Cigulung-Cikapundung sub watershed in North Bandung - West Java), were used.
Informatika Pertanian : Status Saat ini dan Prospek di Masa Depan Setyo Pertiwi
Jurnal Keteknikan Pertanian Vol. 15 No. 2 (2001): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.015.2.%p

Abstract

Pertanian berbudaya  industri merupakan orientasi pembangunan pertanian masa depan di INdonesia. Pertanian berbudaya industri diartikan sebagai pengelolaan kegiatan pertanian secara industri.Beberapa ciri pertanian bebudaya industri adalah adanya pemanfaatan ilmu pengetahuan untuk pengambilan keputusan. pemakaian kemajuan teknologi sebagai instrumen utama pada pemanfaatan sumberdaya dan perekayasaan untuk meminimalkan ketergantungan terhadap lingkungan, efisiensi dan produktivitas sebagai dasar uatama dalm alokasi sumberdaya, mutu dan keunggulan merupakan orientasi, wacana sekaligus tujuan, dan mekanisme pasar instrumen utama dalam transaksi barang dan jasa (Kartasasmita, 1996).
Deteksi Ujung Biji Ginko Menggunakan Pengolahan Citra Berbasis Analisis Morfologi Usman Ahmad
Jurnal Keteknikan Pertanian Vol. 27 No. 1 (2013): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.027.1.%p

Abstract

Abstrak Biji ginkgo harus dibuka untuk diambil dan dimanfaatkan isinya yang lunak. Untuk membuka pelindung daging biji yang keras, orientasi biji harus diketahui, karena biji lebih mudah terbuka pada ujungnya, sedangkan bagian pangkalnya cenderung tetap menyatu. Bila orientasi tidak tepat, maka akan dibutuhkan gaya tekan yang jauh lebih besar untuk membukanya, sehingga seringkali daging biji ikut rusak terkena gaya tekan yang berlebihan. Program pengolahan citra dibuat dan digunakan untuk melakukan deteksi bagian ujung dari biji ginkgo. Hasil deteksi bagian ujung biji menggunakan algoritma berdasarkan analisis morfologi masing-masing 100% untuk Kinbei, 85% untuk Kyujyu, dan 65% untuk Tokuro. Operasi morfologi dilakukan untuk memperbaiki bentuk biji pada citra biner sehingga kemampuan deteksi ujung biji dapat ditingkatkan. Hasil deteksi bagian ujung biji setelah operasi perbaikan bentuk dilakukan masing-masing meningkat menjadi 100% untuk Kyujyu dan 85% untuk Tokuro, sedangkan Kinbei tidak terpengaruh, tetap 100%. Kata Kunci: biji ginkgo, deteksi ujung biji, pengolahan citra, morfologi analisis Abstract Ginkgo nut has to be cracked to obtain its soft and usefull meat for utilization. To crack the hard shell, nut orientation is important to know because the nut is easier to crack at front side or tip or tip part, while the back side is usially remain uncracked. Wrong orientation will need more power to crack the nut and damage to soft meat might be occur due to exessive power. Image processing program was developed and used to detect tip part of the nut. The results of tip detection based on morphological analysis algorithm are 100% for Kinbei, 85% for Kyujyu, and 65% for Tokuro. To improve detection performance, Mhorpological Operation Were are 100% for Kyujyu and 85% for Tokuro, While for Tokuro is remain unffected, 100% detected. Keyword: gingko nut, tip detection, image processing, morphology analysis Diterima: 24 Desember 2012; Disetujui: 25 Maret 2013  
Strawberry is a commercial fruit. It’s Growth and quality is influenced by soil condition, climate, and its self. Irrigation influences soil characteristic, such as: physical, chemical, and microbiological than influence an environment of its growth. this research used drip irrigation method with debit variation and organic matter composition. RCBD was used in this research. Variation of irrigation debit and organic matter composition are the independent variables, whereas dependent variables ar Afik Hardanto; Asna Mustofa; Sumarni .
Jurnal Keteknikan Pertanian Vol. 23 No. 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.023.1.%p

Abstract

Strawberry is a commercial fruit. It’s Growth and quality is influenced by soil condition, climate, and its self. Irrigation influences soil characteristic, such as: physical, chemical, and microbiological than influence an environment of its growth. this research used drip irrigation method with debit variation and organic matter composition. RCBD was used in this research. Variation of irrigation debit and organic matter composition are the independent variables, whereas dependent variables are C-Organic, N-available, characteristic of soil, and quality of strawberry fruit. Variation of debit irrigation did not significant influence to C-Organic, whereas organic matter composition had significant influence to C-Organic in 63th, 84th, and 105th day of planting. The highest C-Organic content on D3P3 treatment that is 17.92% and the lowest on D2P2 treatment that is 5.19%. Debit of irrigation influence to N-available content in 105th day of planting. The highest N-available content in D3P1 treatment that is 0.88 ppm, whereas the lowest N-available content in D2P3 treatment that is 0.67 ppm. Result of analysis, debit irrigation had significant influence and could increase fruit weight and reduction sugar-content. Organic matter composition had significant influence to increase fruit weight, vitamin C, total of soluble-solid, and reduction sugar-content. Combination of irrigation debit and organic matter composition had significant influence to fruit weight. In the treatment, debit ofirrigation that make good influence to fruit quality is 300 ml/day/polybag and 1:2 ratio of organic matter composition.Keywords: drip irrigation, organic matter, strawberryDiterima: 16 September 2008; Disetujui: 25 Pebruari 2009
Non Destructive Inner Quality Prediction In Intact Mango With Near Infrared Reflectance Spectroscopy Agus A Munawar; I Wayan Budiastra
Jurnal Keteknikan Pertanian Vol. 23 No. 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.023.1.%p

Abstract

Two major parameters which determine inner quality and the taste of mango, total soluble solids (TSS) and firmness, are still determined destructively. To evaluate the feasibility of near infrared reflectance spectroscopy (NIRS) technique in determining total soluble solids (TSS) contents and firmness in intact mango, diffuse reflectance (R) spectra were measured in the spectral range from 900 to 1400 nm. Calibration models using R and log (1/R) were established by stepwise multiple linear regression with k-fold leave oneout (LOO) cross validation. The correlation coefficients (r) of calibrations ranged from 0.89 to 0.96 with SEC values 0.46 to 1.08. Both TSS and firmness were predicted accurately using log (1/R) spectra.Keywords: mango, NIRS, firmness, TSS, non-destructiveDiterima: 8 Juni 2008; Disetujui: 31 Januari 2009
Kinetic Model of Biodiesel Processing Using Ultrasound Bambang Susilo
Jurnal Keteknikan Pertanian Vol. 23 No. 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.023.1.%p

Abstract

Ultrasound is predicted to be able to accelerate the chemical reaction, to increase the conversion of plant oil into biodiesel, and to decrease the need of catalyst and energy input. The application of ultrasound for processing of biodiesel and the mathematical model were conducted in this research. The result of the experiments showed that the ultrasound increased reaction rate and the conversion of palm oil into biodiesel up to 100%. It was better than the process with mechanical stirrer that the conversion was just 96%. The duration to complete the process using ultrasound was 1 minute. It was 30 to 120 times faster than that withmechanical stirrer. Ultrasound transforms mechanical energy into inner energy of the fluids and causes an increasing of temperature. Simultaneously, natural mixing process undergo because of acoustic circulation. Simulation with experiment data showed that the acceleration of transesterification with ultrasound was affected not only by natural mixing and increasing temperature. The cavitation, surface tension of micro bubble, and hot spot accelerate chemical reaction. In fact, transesterification of palm oil with ultrasound still needs catalyst. It needs only about 20% of catalyst compared to the process with mechanical stirrer.Keywords : Biodiesel, transesterification, mathematical modeling, ultrasoundDiterima: 16 September 2008; Disetujui: 10 Pebruari 2009
Penentuan Konstanta Resesi Hidrograf Menggunakan Metode Plot Semi Logaritmik (Studi Kasus di Sub DAS Goseng) Putu Sudira; Sukresno .; Elly Kurniawati
Jurnal Keteknikan Pertanian Vol. 23 No. 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.023.1.%p

Abstract

Recession curve is a spesific part of stream hygrograph after it reachs peak flow and it represents the withdrawal of groundwater from storage. Daily recession constant of surface runoff, interflow, and baseflow have been derived for 15 segments on Goseng subwatershed with area approximately 596 ha.Semi logarithmic plot is recession analysis method which plotting stream discharge in y-ordinate and time in x-coordinate in semi logarithmic scale. The start of time recession is denoted by a straight line in the graphic. This method was used for separating a hydrograph into linear components of surface runoff, interflow, and baseflow. The results of the research shows that recession segment from daily hydrographhas short time and does not have all three stream components. A short segment can only be divided into two flow components. Separation pattern for water catchment area are baseflow-interflow, baseflow-surfacerunoff, and interflow-surface runoff. Recession constant value differ from year to year but the differences do not have great influence in determining the average value of recession constant.Keywords : surface runoff, interflow, base flow, recession constant, semi logarithmic plotDiterima: 26 Agustus 2008; Disetujui: 3 Pebruari 2009

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