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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 623 Documents
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VENTlLASI ALAMIAH PADA RUMAH KACA STANDARD PEAK TIPE CURAM TERMODIFtKASI Herry Suhardiyanto; Yudi Chadirin; Sumini .; Titin Nuryawati
Jurnal Keteknikan Pertanian Vol. 21 No. 3 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.3.%p

Abstract

ABSTRACT During the daytime in the tropical region, air temperature inside the greenhouse rises some degrees above the temperature level of outside air. Many greenhouses are build very tight. It formed hot air pocket in upper part of the greenhouse. A modification should be done to allow maximum air exchange rate through natural ventilation. This paper deals with the evaluation of natural ventilation role in reducing air temperature in the modified greenhouse as compared to that in the existing greenhouse. Results showed thal greenhouse modification by increasing the area of side wall openings added 11.82 % air flow rate and reduced the temperature of the inside air about 1°C to 3 °C. The calculated air exchange In both greenhouses agreed well with the measured values. Keywords: greenhouse in the tropics, neutral pressure level, air exchange rate. Diterima: 29 Juni 2007; Disetujui: 19 Agustus 2007  
STUDI KELAYAKAN TERHADAP PROYEK LEMBAH SUNGAI MUSI BANYUASIN BAGIAN 1: STUDI UMUM SEDIMENTASI Sohei Matsuno; Oktarina .
Jurnal Keteknikan Pertanian Vol. 21 No. 3 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.3.%p

Abstract

ABSTRACT This is an extract of a feasibility-study report on the two projects, 'Consolidation of Infrastructure of Biofuel Industry,in Musi- Banyuasin regency and ditto in Banyuasin regency. PART 1 is of general studies on sediment in the Musi-Banyuasin River system where the project sites are located. The primary objective of this report is to forward solution to the sediment-origin problems, which is a compulsory subject for any projects in the Musf-Banyuasin River system. To attain this objective, it clears the following secondary objectives, viz. (a) identifying every problem hindering human lives and activities, (b) drawing a hypothesis about causality, (e) determining basic data by field surveys, lab tests and data analyses and (d) authenticating the hypothesis to be a theory. To achieve these objectives, the studies have gone forward with four represenfative objects, viz. (i) the Muba River system as a wholee, (ii) the lower reaches of the main stream, (iii) the biggest tributary ,and (iv) the biggest dis-tributary. It concludes that sediment is the sole cause of major problems, forwards measures to solve the problems, and suggests do's and don’ts. PART 2, 'Particular Studies on a Certain Project,' explains how the results of PART 1 are applied to the project. PART 1 leaves the verification of the suggested technical systems to full-scale/ in­-situ model tests that are elaborated in PART 2 and to baexecuted in the first step of each project. Keywords: sedimant-effects, In-swamp irrigation / transportation Diterima: 8 Juli 2007; Disetujui: 22 Agustus 2007
MATHEMATICAL MODEL TO PREDICT THE CAPACITY OF FRESH PRODUCE MARKET Tetsuya Araki; Tetsuya Koyama; Yasuyuki Sagara; Armansyah H. Tambunan
Jurnal Keteknikan Pertanian Vol. 21 No. 3 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.3.%p

Abstract

ABSTRACT Deregulation policies for the supply chain of agricultural products brought not only a rapid increase in fresh produce that were trensectcd in most of wholesale markets in Indonesia. but also the difficulty in striking an appropriate balance between the expansion of the profit from these transactions and the control of environmental damages in the market as well as surrounding areas, In this study. engineering tieldwork was carried out for totally nine months since 2000, and then a market capacity model has been proposed to predict maximum acceptable amount of incoming products per unit ereaa in the market. The model calculation was based on the standardized unit area in the market. The model was applied to the average amount of daily incoming products to estimate minimal floor space for each product in the market, and then the results indicated that the market capacity should be 15% larger than that in 2003 to solve the overstocks of the products in all the passages of the market. However, it would be difficult to provide sufficient floor space of fresh produce in the market if the number of wholesalers reaches almost the double, as planned by the merket authority, after the completion of the reconstruction project. Therefore, the supply chains should be radically improved to attain the rationalized market in Jakarta, including the abolishment of the regulation related to the status of the market as the only central wholesale market.  Keywords : Engineering  fieldwork, mathematical model, maximum acceptable amount, minimal floor space. supply chain Diterima: 17 Juli 2007; Disetujui: 19 Austus 2007  
PENERAPAN LOGIKA FUZZY PADA PENILAIAN MUTU TEH HITAM ORTHODOX Roni Kastaman; Sudaryanto Zain; Sigit B. Prayudo
Jurnal Keteknikan Pertanian Vol. 21 No. 3 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.3.%p

Abstract

ABSTRACT In testing quality process of the orthodox black tea by using tea organoleptic expert, there is often found a problem of tester sensoric restriction. Based on this conditon the research has been carried out by using fuzzy modelling technique, which aimed to explore ruther more about how fuzzy method can concordance with fuzzy range value on black olthodox tea assesment. So that, it could be more objective on quality evalualion. The research has beld on May to June 2005 in tea plantation facility of PTPN Vlll Malabar. Pangalengan, and Tea and Cinchona Research Center (Pusat Penelitian Ten dan Kina -PPTK) Gembung, Cieidey, West Java. This fuzzy method can keep a record experience of the orthodox black tea tester and also correct the result of the determination done by the tester, Based on the parametrik LSD test and non-parametrik Mann-Whitney, there is no significant value diference In the result of the determination done by the tester and by using the fuzzy logic. So that the fuzzy logic method can be used as a method in orthodox black tea quality determination. But The method can not be used if there is a far diference in the tea determination between one tester to the others. Tbe best defuzzification method for tea quality detemination in this occasion is Smallest of Maximum (SOM) method.Keyword: Fuzzy Logic, Orthodox Black Tea, Quality Determination. Diterima: 30 Juli 2007; Disetujui: 22 Agustus 2007
VALIDASl SPESIFlKASI CAMPURAN BIODIESEL-SOLAR HASIL PENGUKURAN DENGAN METODA PERHITUNGAN SEDERHANA Soni S. Wirawan; Armansyah H. Tambunan; Martin Djamin; Hiroshi Nabetani
Jurnal Keteknikan Pertanian Vol. 21 No. 3 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.3.%p

Abstract

ABSTRACT Biodiesel is a fuel derived from vegetable oil or animal fats that can be used as an additive to or entirely replace conventional petroleum diesel fuel. In most cases, biodiesel is mixed with conventional diesel because of the higher cost of biodiesel, product availability and engine compatibility issues. In Indonesia, the decree No. 3675K/24/DJM/2006 regarding the quality and specification of diesel oil type Solsr 48 and Solar 51 has been issued this decree regulates the use of FAME (fatty acid methyl ester) up to the maximum of 10 percent of the volume of automotive diesel fuel with which it is to be blended. The cost to measure the properlles of fuel is expensive and time consuming, therefore it is important to develop a simple method to predict those blending properties. This paper presents the development of a simple calculation method for the validation of blend palm biodiesel-mineral diesel specification (density, viscosity, cetane number and lubricity) which has been measured in the author's previous study The result shows that the lubricity and viscosity shows a higher average error value (difference value between calculation and measurement result) of 1.66% and 1.35%, whereas density and cetane number shows lower average error values of 0.06 and 0.6%. The average error value less than 2% is still acceptable. Keywords: Biodiesel, blend, fuel properties, density. cetane, viscosity, lubricity Diterima; 20 Agustus 2007; Disetujui: 31 Agustus 2007
PERBAlKAN METODE PENGHITUNGAN DEBIT SUNGAI MENGGUNAKAN CUBIC SPLINE 'NTERPOLATION Budi I. Setiawan; Rudiyanto .; M. Idkham; Mustafril .; M. Yasar; Devianty .
Jurnal Keteknikan Pertanian Vol. 21 No. 3 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.3.%p

Abstract

ABSTRAKMakalah ini menyajikan perbaikan metode pengukuran debit sungai menggunakan fungsi cubic spline interpolation. Fungi ini digunakan untuk menggambarkan profil sungai secara kontinyu yang terbentuk atas hasil pengukuran jarak dan kedalaman sungai. Dengan metoda baru ini, luas dan perimeter sungai lebih mudah, cepat dan tepat dihitung. Demikian pula, fungsi kebalikannnya (inverse function) tersedia menggunakan metode. Newton-Raphson sehingga memudahkan dalam perhitungan luas dan perimeter bila tinggi air sungai diketahui. Metode baru ini dapat langsung menghitung debit sungaimenggunakan formula Manning, dan menghasilkan kurva debit (rating curve). Dalam makalah ini dikemukaan satu canton pengukuran debit sungai Rudeng Aceh. Sungai ini mempunyai lebar sekitar 120 m dan kedalaman 7 m, dan pada saat pengukuran mempunyai debit 41 .3 m3/s, serta kurva debitnya mengikuti formula: Q= 0.1649 x H 2.884 , dimana Q debit (m3/s) dan H tinggi air dari dasar sungai (m).Kata Kunci: Debit Sungai, Penarnpang dan Perimeter Basah Sungai, Cubic Spline Interpolation.Diterima: 8 Agustus 2007; Disetujui: 22 Agustus 2007
PENDUGAAN KANDUNGAN AIR, PROTEIN, LlSIN DAN METIONIN TEPUNG IKAN DENGAN JARINGAN SYARAF TIRUAN BERDASARKAN ABSORBSI NEAR INFRARED Adrizal .; Hadi K. Purwadaria; I Wayan Budiastra; Wiranda G. Piliang
Jurnal Keteknikan Pertanian Vol. 21 No. 4 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.4.%p

Abstract

ABSTRACTThe objective of this study was to apply artificial  neural network (ANN) to enable accurate and fast prediction of moisture, protein. lysine and methionine contents of ftishmeal. The several wevelenqths of near intrared absorbance, range from 900 to 2,000 nm, were selected for training and validating ANN on each chemical component by stepwise multiple linear regression analysis. Tne ANN with three, five. seven and nine nodes at hidden layer were trained using 35 samples for moisture and protein, 33 samples for lysine and 30 samples for metionine Validating was conducted on 10 independent samples. The results of validating indicated that the best of protoin prediction was achieved by ANN with seven nodes at hidden layer for moisture. five nodes for protein and methionine, and three nodes for lysine. The standard error of prediction, coefficient of variation and ratio of standard deviation and standard error of prediction respoctivety were 0.61%, 4.81%, and 6.89 for moisture contents; 2.99%, 6.43% and 3.34 for protein contents: 0.14%, 11.32% and 3.04 for lysine contents: and 0.07%. 10.50% and 2.16 for methionine contents. With the same data entry. the ANN could predict with better performance than did by multiple linear regression Keywords: artificial neural network, near infrared, fishmeal Diterima: 25 September 2007, Disetujui: 9 Nopember 2007              
APLlKASI ARTIFICIAL NEURAL NETWORK UNTUK MENDUGA PRODUKSI TEBU (Saccharum officinarum L) DI PTPN VII PG. CINTA MANIS Amin Rejo
Jurnal Keteknikan Pertanian Vol. 21 No. 4 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.4.%p

Abstract

AbstractThe objective of this research was to estimate the production of sugarcane by using artificial neural network algorithm. The training was done at soma variety of iteration, those are 1000, 2000, 3000, and 4000 with the nodes at the hidden layer. 2,4, 6, and 8. Based on the simulation. it showed that the more nodes and iteration could reduce sum of squere error. for example iteration 1000 at node 2, sum of square error was 0.0148. and at the node 8, sum of squares error was 0.000196 In ither side at the node 2, the iteration 1000, the sum of squares was 0.0148, and the iteration 4000, the sum of squares was 0.00345. The result of the model test showed that sugarcane productivity had the exact for prediction that was from 87. 5 % to 97.15 %, for sugarcane production it had low prediction that was 40.0 % to 92 5 .% and respectively, it had 94.2 % to 98.8 %. Keywords: Artificial neural network, beckpropaqation, estimate of suqaercene production Diterima: 18 Nopember 2007; Disetujui: 3 Desember 2007  
OPTIMALlSASI PRODUKSI TEBU DENGAN PROGRAM LINEAR PADA PABRIK GULA TAKALAR SULAWESI SELATAN Amran Sulaiman
Jurnal Keteknikan Pertanian Vol. 21 No. 4 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.4.%p

Abstract

ABSTRACTThe aim of the optimization of sugar cane production at PG Takalar is allocate all resources proportionally to get the maximal production according to factory design attached witt relatively low cost. The optimizetion was conducted with linear programming. The result showed that optimal planting period for the plant cane is June, July. October, and November, while for retoon is June up to November. The varieties those give the optimal production is Camp, F.154, Others, PS.61, PS.85-1. Q.81, and ROC. 10. The optimal portion of plant category was 25% plant cane, 30% retoon I. 25% retoon II and 20% of ratoon III. By optimization, the total area of 3.213 ha potentially can produce 192.036. 13 ton/year, which is increase about 115% from the regular practice. Keyword: Linear programming, optimization, plant cane, sugar cane Diterima: 30 Oktober 2007: Disetujui:22 Nopember 2007  
KAJIAN KEBIJAKAN ALAT DAN MESIN PERTANIAN Armansyah H. Tambunan; E. Namaken Sembiring
Jurnal Keteknikan Pertanian Vol. 21 No. 4 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.4.%p

Abstract

ABSTRACT The development of agricultural mechanization In Indonesia is still very low, even though it is believed that a proper application of agricultural mechinery can improve agricultural productivity and netional competitiveness significantiy. The development of agro-machinery industry is also very low due to unfavorable policy. This paper disclose the trend of agricultural mechanization development in Indonesia and the policy that may influence the trend. The paper concluded that (1) procurement system of agro-machinery should take Into account its appropriateness to the local requirement and condition, (2) lnter-sectoral regulation should consider the possibility to enhance local and domestic agro-mechinery industry. and (3) the local government should establish an mtersectoral technical unit In charge of agricultural mechanization. Keywords: agricultural mechanization, agro-mechinery industr, deregulation Diterima: 20 Agustus 2007, Disetujui: 20 Nopomber 2007  

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