agriculture; biosystem; mechanics; engineering

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Issue Title
 
Vol 11, No 1 (1997): Buletin Ketenikan Pertanian

Freeze drying of food materials is a time and energy consuming process, hence a high cost process. The drying rate is limited by heat and mass transfer process within the dried portion of the product. In order to improve the freeze drying performance, it is important to know parameters which affect the drying characteristics of each spesific food material, in regard to the drying time and the energy consumption. The objective of this experiment was to study the freeze drying characteristic of miched beef especially the effect of freezing rate and surface temperature of the material to the drying time.

The study was conducted with freezing rate at 7.71 cmhours and 1.94 cmhours which are classified into fast and slow freezing rate, while the surface temperature of the material was controlled at 40 OC, 35 OC, and 30 OC. The experimental results confirmed that the faster freezing rate then the longest drying time, while the higher surface temperature give a shorter drying time of miched beef. It is important to determine the optimal freezing rate and surface temperature from the view point of energy consumption.

Abstract   PDF
Yulia Lisnawati, Armansyah H Tambunan
 
Vol 11, No 1 (1997): Buletin Ketenikan Pertanian

This paper concerns with the development of a decision support package for chipper allocation at the transmigration land preparation area. It is intended to be used by chip entrepreneur on determining the most economical chipper allocation and man power requirement.

The package was developed by using Turbo Pascal, running well on the computers compatible with ISM PC (XT or AT) with minimum 640 Kb RAM and VGAISuper VGA monitor. Program testing showed that the program has a sufficient capability as a management tool.

 

Abstract   PDF
Irwan Ibnu Santoso, Setyo Pertiwi
 
Vol 12, No 2 (1998): Buletin Ketenikan Pertanian

Terminologi traktor beserta peralatan dan pengoperasiannya atau yang berkaitan dengan traktor, umumnya berasal dan berkembang dari negara-negara pembuat dan pengembang traktor pertanian. Ide awal dari penyusunan terminologi ini berasal dari usulan Prof. Dr. Jun SAKAI (JICA expert), dan diterima dengan baik oleh staf Laboratorium Alat dan Mesin Budidaya Pertanian, Jurusan Teknik Pertanian, FATETA, IPB, yang juga melihat perlunya penyusunan terminologi di bidang keteknikan pertanian agar orang-orang yang bergerak di bidang keteknikan pertanian berkomunikasi dalam istilah dengan pengertian yang sama.

 

Abstract   PDF
E Namaken Sembiring, Radite Praeko A S, I Nengah Suastawa, Tineke Mandang
 
Vol 12, No 1 (1998): Buletin Ketenikan Pertanian

The equipment that were bought from the manufacturer would have the data of reliability for example, MTTF (Mean Time To Failure), MTBF (Mean Time Between Failure) or MTTR (Mean Time To Repair), however these data only valid if the operation and maintenance condition are same with the operation and maintenance condition that were given by the manufacturer. If these condition could not be satisfied by the user then the data of MTTF, MTBF and MTTR that given by manufacturer could not be able as a refwence data of reliability.

This research aimed to devt?loped the statistical method of probability density fimtion which can be used on the data processing which are collected during operation and maintenance of the paper machine P. T Kertas Padalarang from 1980 to 1995. By processing these data, MTTF, MTBF or MTTR of the components can be determined.

To calculate the tofal failure probability of paper machine, the author used the sofrware of DFT (Diagram Fault Tree Analysis) that developed by Suryadh.na.N.N.'71 The result of this research is the total failure probability of paper machine is 0.999 at the operation time of 2000 hr. It is mean that at that operation time the machine has reached failure condition, may be it will stop suddenly. At that operation time, the reliability of machine is 0.001. The Operation time of 2000 hr could be able as a reference value for doing maintenance and repair.

Abstract   PDF
M Yamin, Kusmayanto Kadium, Hermawan Kresno Dipoyono
 
Vol 12, No 2 (1998): Buletin Ketenikan Pertanian

The ratio of specifc heat capacity, at constant presszrre to that at constant volume (cdc,J, of a gas can be determined by either the adiabatic expansion method or the sound velocity method. The objective of this experiment is apply the adiabatic expansion method for determining the spec$c heat capacity ratio of gas N2 and O2 The result showed that the ratio were 1.14 and 1.19 respectively for gas N2 and 02.T he value obtained by the experiment was d~flerenta bout 15 to 19% from the result determined by theoretical method using 5 degree of Jkeedom. Theoretically cdc,, of both gas N2 and 0 2 which have 5 degree offreedom are 1.4. The dzflerence was considered to be caused by thee xperimental condition, which were not suflciently adiabatic, as required by the method. However, the simplicity of the method and clarity of its theoretical approach is advantageous to be used by students of Advance Thermodynamic class as a practical exercise.

Abstract   PDF
Wiludjeng Trisasiwi, Dyah Wulandani, Kamaruddin Abdullah, Armansyah H Tambunan
 
Vol 12, No 1 (1998): Buletin Ketenikan Pertanian

The study on Work Load Calibration by using Step Test and Ergometer test was carried out in order to find the best way 10 calibrate the data measurement and to predict human work load by using heart rate data. This study was conducted on four male subjects. but the data analysis has just been done to three subjects due one of the subject was insufficient performance. The sport tester PE3000 heart rate monitor is used for measuring the heart rate data which will be useful for predicting the work load on each activity. The linear regression method is also used to predict the work load based on the heart rate data, so that the best alternative scenario data input will be able to determined by comparing the correlation coefficient or coefficient of determination.

Abstract   PDF
Roni Kastaman, Sam Herodian
 
Vol 5, No 2 (2017): JURNAL KETEKNIKAN PERTANIAN Pelapisan Lilin Karnauba dan Kitosan untuk Mempertahankan Mutu Wortel Kupas Abstract   PDF
Trisma Rezeki Zairisman, I Wayan Budiastra, Sugiyono Sugiyono
 
Vol 3, No 1 (2015): Jurnal Keteknikan Pertanian Pelapis Nanokomposit untuk Pengawetan Salak Pondoh Terolah Minimal Abstract   PDF
Monika Marpaung, Usman Ahmad, Nugraha Edhi S
 
Vol 5, No 3 (2017): JURNAL KETEKNIKAN PERTANIAN Pemanfaatan Air Tanah Dangkal untuk Irigasi Padi Menggunakan Pompa Berbahan Bakar LPG Abstract   PDF
Agus Haryanto, Suharyadi Suharyadi, Budianto Lanya
 
Vol 5, No 1 (2017): JURNAL KETEKNIKAN PERTANIAN Pemanfaatan TKKS Sebagai Pengisi Komposit Epoxy Untuk Struktur Bergerak Mesin CNC Perkayuan Abstract   PDF
Farkhan ., Yohanes Aris Purwanto, Erizal Hambali, Wawan Hermawan
 
Vol 6, No 2 (2018): JURNAL KETEKNIKAN PERTANIAN Pembuatan dan Pendugaan Lama Simpan Bubuk Asam Sunti dalam Kemasan dengan Metode Sorpsi Abstract   PDF
Desi Idayanti, Emmy Darmawati, Sutrisno Sutrisno
 
Vol 2, No 1 (2014): Jurnal Keteknikan Pertanian Pembuatan Digital Elevation Model Resolusi 10m dari Peta RBI dan Survei GPS dengan Algoritma ANUDEM Abstract   PDF
Indarto ., Debby Rio Prasetyo
 
Vol 21, No 2 (2007): Jurnal Keteknikan Pertanian PEMBUATAN La0,8Ca0,2MnO3 SEBAGAI KATODA PADA SOLID OXIDE FUEL CELL (SOFC) DAN KARAKTERISASINYA Abstract   PDF
Riska Ekawita
 
Vol 20, No 3 (2006): Jurnal Keteknikan Pertanian PEMERIKSAAN MUTU KARET RSS MENGGUNAKAN PENGOLAHAN CITRA Abstract   PDF
Usman Ahmad, Fahmi Riadi, I Dewa Made Subrata
 
Vol 2, No 1 (2014): Jurnal Keteknikan Pertanian Pemetaan Indeks Stabilitas Tanah Menggunakan SINMAP di Sub-DAS Rawatamtu Abstract   PDF
Aulia Nafiza Andalina, Hamid Ahmad, Indarto .
 
Vol 21, No 3 (2007): Jurnal Keteknikan Pertanian PEMETAAN ISOPHREATIC KONTUR UNTUK MENDUGA ARAH ALlRAN CEMARAN LINDI DI BAWAH PERMUKAAN TANAH (STUDI KASUS PADA TPA SAMPAH GALUGA) Abstract   PDF
Teti Syahrulyati, Surjono H. Sutjahjo, Soedodo Hardjoamidjojo
 
Vol 7, No 1 (2019): JURNAL KETEKNIKAN PERTANIAN Pemodelan Bahaya Banjir Kawasan Perkotaan (Studi Kasus di Kota Kendari) Abstract   PDF   PDF
La Gandri, Mohamad Yanuar Jarwadi Purwanto, Bambang Sulistyantara, Alinda Fitriani Medrial Zain
 
Vol 22, No 2 (2008): Jurnal Keteknikan Pertanian Pemodelan Dan Simulasi Pengeringan Jagung Pipilan Dalam Pengering Rotari Tumpukan Abstract   PDF
Leopold Oscar Nelwan, I Nengah Suastawa, Sulikah .
 
Vol 3, No 2 (2015): JURNAL KETEKNIKAN PERTANIAN Pemodelan Daya Pengadukan selama Proses Dehidrasi Osmotik Irisan Mangga dalam Larutan Gula Abstract   PDF
Leopold O. Nelwan, Fibula Yudisaputro, Hiroshi Nabetani
 
Vol 6, No 2 (2018): JURNAL KETEKNIKAN PERTANIAN Pemodelan Jaringan Syaraf Tiruan untuk Memprediksi Color Difference Tepung Sagu pada Pneumatic Conveying Recirculated Dryer Abstract   PDF
Abadi Jading, Nursigit Bintoro, Lilik Sutiarso, Joko Nugroho Wahyu Karyadi
 
Vol 2, No 1 (2014): Jurnal Keteknikan Pertanian Pemodelan Lahan Basah Potensial Berdasarkan Indeks Topografi Di Bretagne, Prancis Abstract   PDF
Helena Ariesty, Blandine Lemercier, Lionel Bertheir, Roh Santoso Budi W, Satyanto K. Saptomo
 
Vol 7, No 1 (2019): JURNAL KETEKNIKAN PERTANIAN Pemodelan Sorpsi Isotermi dan Pendugaan Umur Simpan Beras Pratanak pada Kemasan Plastik Film Abstract   PDF
Hasniar ., Rokhani Hasbullah, I Wayan Astika
 
Vol 23, No 1 (2009): Jurnal Keteknikan Pertanian

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 of
irrigation 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, strawberry
Diterima: 16 September 2008; Disetujui: 25 Pebruari 2009

Abstract   PDF
Afik Hardanto, Asna Mustofa, Sumarni .
 
Vol 20, No 3 (2006): Jurnal Keteknikan Pertanian PEMUTUAN EDAMAME MENGGUNAKAN PENGOLAHAN CITRA DAN JARINGAN SYARAF TIRUAN Abstract   PDF
Dedy Wirawan Soedibyo, I Dewa Made Subrata, Suroso ., Usman Ahmad
 
Vol 6, No 1 (2018): JURNAL KETEKNIKAN PERTANIAN Penalaan PID Menggunakan Internal Model Controller dengan Pendekatan Model Tustin Abstract   PDF
Abdul Azis, Radite Praeko Agus Setiawan, Wawan Hermawan, Tineke Mandang
 
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