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Jurnal Keteknikan Pertanian
ISSN : 24070475     EISSN : 23388439     DOI : -
Core Subject : Agriculture,
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 623 Documents
Rancang Bangun Alat Pengering Klanting Tipe Rak dengan Sumber Panas Kompor Listrik Hardanto .; Sulistyo .
Jurnal Keteknikan Pertanian Vol. 24 No. 1 (2010): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.946 KB) | DOI: 10.19028/jtep.024.1.%p

Abstract

Abstract Klanting is a cassava products that one of special food from Banyumas residence besides Gethuk goreng and Mendoan. Problem from produced of klanting is in drying process of raw material. IKM in Banyumas residence still has been using a conventional method. It use sunshine to dry the product, so it make capacities of klanting production became decrease in rainy season. Aims of the research were: (1) to design the rack dryer equipment for klanting with heat source from electric-stove, (2) to study performance of the equipment. This research used three steps, the steps were: (1) design of dryer equipment, include: functional and structural design, (2) dryer equipment manufacturing, and (3) performance test of dryer equipment include: functional test, reliability test, test without burden and test with burden. Design and manufacture of the equipment was processed in Agricultural Mechanization laboratory, Agricultural Faculty, Jendral Soedirman University. Furthermore, it was tested in UKM Sari Murni, Tamansari village, District Of Karanglewas, Banyumas residence. Result of the research showed that as a functional and structural design it is can operate with dimensions are, length 144 cm, wide 80 cm, and high 100 cm. At performances test without burden showed that the lowest draining in 370C, highest 470C, air stream at inlet equal 6.24x10-2m3/s, air stream exhaust 0.36x10- 2m3/s, while amount energy the required is 0.945 kW. The result of performances test with burden showed that total dryer capacities are 15.00 kg with mean capacities equal to 1.501 kg, lowest temperature in 310C, while highest temperature in 380C, air stream at inlet equal is 6.24x10-2 m3/s, air stream exhaust is 0.224x10-2 m3/s, while amount of energy required to dry klanting is 2.52 kW. Whereas water content of klanting dried by appliance is 28.21%bb or 39.52% bk from water content initial 56.15%bb. Keywords: klanting, rack dryer, electric stove Diterima: 9 November 2009; Disetujui: 16 Maret 2010 
Rancang Bangun Mesin Pemanen Udang (Penaeus sp.) Rizki Maulaya; Sam Herodian
Jurnal Keteknikan Pertanian Vol. 27 No. 1 (2013): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1363.767 KB) | DOI: 10.19028/jtep.027.1.%p

Abstract

ABSTRAK Kualitas udang sangat dipengaruhi oleh keseluruhan proses budi daya, termasuk proses pemanenan. Sejauh ini proses pemanenan udang tambak di Indonesia masih menggunakan cara tradisional. Penelitian ini bertujuan untuk merancang bangun mesin pemanen udang tipe vakum dengan mekanisme baru untuk meningkatkan efisiensi dan efektivitas pemanenan sehingga mutu udang dapat terjaga dengan baik. Tahapan penelitian ini dimulai dari identifikasi permasalahan, desain dan analisis rancangan, pembuatan prototype, dan pengujian fungsional. Desain ini menggunakan sistem vakum yang diterapkan mulai dari saluran inlet, tangki penampungan, sampai saluran outlet. Dengan menggunakan pompa air sentrifugal, komoditas yang ada di tambak dihisap dan diperangkap dalam tangki penampungan tanpa melalui impeller pompa. Selain itu, desain ini juga menggunakan pompa vakum untuk menjaga tekanan di dalam sistem. Hal ini bertujuan untuk mengatasi kebocoran yang sulit dideteksi pada sistem. Dari data yang diperoleh, debit aliran tertinggi mencapai 5.27 l/det dengan kecepatan hisap sebesar 0.65 m/det. Sedangkan debit aliran terendah 4.75 l/det dengan kecepatan hisap sebesar 0.59 l/det. Dengan demikian, komoditas yang dapat dihisap dengan mesin ini hanyalah udang yang memiliki kecepatan renang yang berkisar pada kecepatan hisap rata-rata nesin, yakni 0.61 l/det. Perlu dilakukan penelitian lebih lanjut mengenai mekanisme pemanenan udang tipe vakum untuk menghindari kebocoran yang sulit dideteksi.   Kata kunci: mesin pemanen, vakum, udang, kecepatan renang  ABSTRACT Shrimp quality is influenced by several factors including the harvesting process. So far, the harvesting process for shrimp in Indonesia is still traditional. This research aims to design a vacuum-type shrimp harvester to improve the efficiency and effectiveness of farming productivity. So that shrimp quality can be maintained high. Stages of this research starts from the problems identification, design analysis, prototyping, and functional test. This design uses a vacuum system that is applied starting from the inlet channel, tanks, to the outlet channel. By using centrifugal water pump, commodities in pond are inhaled and trapped in the tank without passing through the impeller. In addition, this design also uses a vacuum pump to maintain pressure in the system. It aims to solve the undetected leaks on the system. From the data obtained, the highest flow rate is 5.27 l/s with suction speed of 0.65 m/s, while the lowest flow rate is 4.75 l/s with suction speed of 0.59 m/s. Commodity that can be inhaled by this prototype is shrimp that has burst speed ranging in average of its suction speed, ie 0.61 m/s. It needs the next research to make the other harvesting mechanism to avoid the undetected leaks on the system.Keywords: harvester, vacuum, shrimp, burst speedDiterima: 25 Oktober 2012: Disetujui: 20 Februari 2013
Pengembangan Dan Uji Kinerja Mesin Pemupuk Dosis Variabel Pada Budidaya Padi Sawah Dengan Konsep Pertanian Presisi Pandu Gunawan; Radite P.A. Setiawan; I Wayan Astika
Jurnal Keteknikan Pertanian Vol. 27 No. 1 (2013): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1400.517 KB) | DOI: 10.19028/jtep.027.1.%p

Abstract

ABSTRACT This paper discussed about the development of electronically controlled fertilizer applicator machine based on modified riding type paddy transplanter tractor. The machine had ability to perform variable rate of application dose using urea, phosphor, and NPK compound. The developed variable rate applicator (VRA) equipped with digital controlled metering devices so that the dose of application can be given accurately and the amount of application can be change in flexible way according to recommended dose. The machine has 4 unit of metering devices, has 8 application rows, and equipped with pneumatic diffusers. RTK-DGPS was used to monitor the position in the field. Performance test has been done for several parameters, included uniformity of air flow at each diffuser, granular fertilizer spreader pattern, and linearity of actual amount of fertilizer with respect to the commanded dose. Average rate of air flow in each diffuser was 0.0073 m3/s, with 7.23 % CV. Total working width of the machine was about 5 m. Field capacity was about 0.12 ha/hours. The results of the tests on metering dose showed that the develop VRA could spread fertilizer uniformly and gave accurate application dose. The yield result showed that uniformity of unhulled rice production was reached 74.7%.Keywords: VRT, URT, fertilization, paddy, precision farming Diterima: 21 Januari 2012 ; Disetujui; 18 Juli 2012  ABSTRAK Makalah ini membahas tentang pengembangan system penjatah pupuk dengan control elektronik pada mesin pemupuk dosis variable menggunakan traktor perawatan lahan sawah yang telah dimodifikasi.Mesin yang dikembangkan memiliki kemampuan menjatah dosis pupuk secara variable untuk jenis pupuk urea, fosfor, dan NPK. Mesin pemupuk dosisvariabel dilengkapi dengan kontrol digital untuk penjatahan pupuk sehingga dapat memberikan takaran pupuk secaraakurat sesuai dengan dosis yang dianjurkan.Mesin memiliki empat unit penjatah pupuk,delapan baris aplikasi pupuk, dan dilengkapi dengan diffuser pneumatic untuk menyebarkan pupuk. RTK-DGPS digunakan untuk memantau posisi mesin di lahan. Uji performansi telah dilakukan untuk mengetahui kinerja mesin pada beberapa parameter pengujian, yaitu: keseragaman aliran udara bertekanan pada komponen diffuser, polase baranpupuk granular, dana kurasi jumlah pupuk yang dijatah terhadap jumlah pupuk yang dianjurkan. Rata-rata debit aliran udara pada komponen diffuser adalah 0.0073 m3/detik dengan nilai CV 7.23%. Lebar kerja mesin 5 meter.Kapasitas lapang efektif mesin0.94 ha/jam. Hasil pengujian pada jumlah dosis yang dikeluarkan menunjukkan bahwa mesin pemupuk dosisvariabel dapat menyebarkan pupuksecara merata dan akurat. Hasil panen gabah pada lahan percobaan menunjukkan nilai tingkat keseragaman hasil produksi gabah mencapai 74.7%. Kata Kunci: Variable Rate Technology, Uniform Rate Technology, pemupukan, padi, pertanianpresisi
Pendeteksian Kerapatan dan Jenis Gulma dengan Metode Bayes dan Analisis Dimensi Fraktal untuk Pengendalian Gulma Secara Selektif Mohamad Solahudin; Kudang Boro Seminar; I Wayan Astika; Agus Buono
Jurnal Keteknikan Pertanian Vol. 24 No. 2 (2010): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (883.723 KB) | DOI: 10.19028/jtep.024.2.%p

Abstract

Abstract Destructive impacts of herbicide usage on environment and water contamination have led to many researches oriented toward finding solutions for their accurate use. If density and weeds species could be correctly detected, patch spraying or spot spraying can effectively reduce herbicide usage. A precision automated machine vision for weed control could also reduce the usage of chemicals. Machine vision is a useful method for segmentation of different objects in agricultural applications, especially pattern recognition methods. Many indices have been investigated by researchers to perform weed segmentation based on color information of the images.  But there is no research that aims to identify weed diversity and its influence on the consumption of herbicides. The purpose of this research is to build a system that can recognize weeds and plants. In this study the relation between three main components (red, green and blue) of the images and color feature extraction (Hue, Saturation, Intensity) used to define weeds and plants density. Fractal dimension used as the methode to define  shape features to distinguish weeds and plants. Weeds and plants were segmented from background by obtaining H value and its shape was obtained by fractal dimension value. The results show fractal dimension value for weeds and plants has specific values. Corn plants have fractal dimension values in the range 1.148 to 1.268, peanut plants have fractal dimension values in the range 1.511 to 1.629, while the weeds have Fractal dimension values in the range 1.325 to 1.497. Keywords: image processing, machine vision, weed control, fractal dimension Diterima: 26 Juli 2010; Disetujui: 4 Oktober 2010
Pengaruh Penyusutan Temu Putih (Curcuma zedoaria (Berg) Roscoe) Terhadap Karakteristik Pengeringan Lapisan Tipis Inge Scorpi Tulliza; Armansyah H. Tambunan; Usman Ahmad
Jurnal Keteknikan Pertanian Vol. 24 No. 2 (2010): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.054 KB) | DOI: 10.19028/jtep.024.2.%p

Abstract

Abstract The objective of this study is to analyze the occurrence of shrinkage during thin layer drying of Temu Putih (Curcuma zedoaria (Berg) Roscoe) and its effects to the drying characteristics. The experiments were conducted using a laboratory scale dryer with data acquisition and equipped with machine vision system.The drying conditions was controlled at temperatures (T) of 50°C, 60°C, 70°C,relative humidity (RH) 20%,30%, 40%, 50% and air velocity 0.78 m/s – 1.95 m/s with a specific combinations. The results show that the temu putih’s slices were shrinking as the moisture content was decreasing with almost linier correlation.The drying data was used to determine the drying constants using three models, namely Henderson andPabis, Lewis, and Page model. The effects of the shrinkage to the drying characteristics is discussed in term of the relation between surface area ratio (AR) to moisture ratio (MR). Keywords: Drying;Thin Layer drying; Shrinkage; Temu Putih Diterima: 24 Maret 2010; Disetujui: 13 September 2010
Uji Getaran Mekanis dan Kebisingan pada Mesin Thermal Fogger Tipe TS-35A(E) Aris Adhi Permana; Mad Yamin
Jurnal Keteknikan Pertanian Vol. 27 No. 1 (2013): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1270.045 KB) | DOI: 10.19028/jtep.027.1.%p

Abstract

Abstract The high utilizing of thermal fogger machine in agriculture is giving an impact for operator’s health and comfortness. This is because of mechanical vibration and noise level which produced by thermal fogger machine disturbing operator activity. Measuring of vibration and noise on thermal fogger machine was conducted by using vibrationmeter and sound level meter. The measurement results show that the operator was exposed 99.4 dB(A) noise and 4.03 m/s2 vibration. A hand arm vibration nomogram was employed  with vibration factor 3 hours for comfortable level and 8 hours for safety level, concurently with noise standard provided by National Ministry of Labor. The result derived from noise analysis shows that daily exsposure time of the machne utilization is 15 – 30 minutes as the noise factor shows significant effect on the machine operation. As the preventing action to decreasing noise level, it can using ear muff and ear plug. Beside that, by covering the machine using foam rubber. Keywords : noise, mechanical vibration, thermal fogger machineAbstrak Penggunaan mesin thermal fogger yang cukup tinggi di pertanian, memberikan dampak bagi kesehatan dan kenyamanan operator. Hal ini karena getaran mekanis dan tingkat kebisingan yang dihasilkan thermal fogger yang mengganggu aktivitas operator. Pengukuran getaran dan kebisingan dari thermal fogger Tipe TS-35A(E) dilakukan dengan menggunakan vibrationmeter dan sound level meter. Hasil pengukuran menunjukkan bahwa operator terpapar kebisingan 99.4 dB(A) dan getaran 4.03 m/s2. Sebuah hand arm vibration nomogram digunakan dengan faktor vibrasi 3 jam untuk tingkat kenyamanan dan 8 jam untuk tingkat keamanan, sesuai dengan standar kebisingan yang dikeluarkan oleh Kementrian Tenaga Kerja. Hasil yang diperoleh dari analisis kebisingan menunjukkan bahwa waktu paparan harian untuk penggunaan mesin adalah 15-30 menit di mana faktor kebisingan menunjukkan pengaruh yang nyata pada pengoperasian mesin. Sebagai langkah pengamanan untuk menurunkan tingkat kebisingan, dapat menggunakan penutup telinga. Selain itu, dapat juga dilakukan penutupan mesin dengan bahan busa karet. Kata kunci: kebisingan, getaran mekanis, thermal fogger, operator Diterima: 15 Oktober 2012; Disetujui: 7 Februari 2013
Rancang Bangun Sistem Sortasi Cerdas Berbasis Pengolahan Citra untuk Kopi Beras Dedy W. Soedibyo; Usman Ahmad; Kudang Boro Seminar; I Dewa Made Subrata
Jurnal Keteknikan Pertanian Vol. 24 No. 2 (2010): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (846.398 KB) | DOI: 10.19028/jtep.024.2.%p

Abstract

Abstrack Coffee has good prospects as a motor of development in Indonesia agribusiness  and agroindustry, therefore needs to be handled properly and professionally. Grading process in commercial green coffee asgrain commodity is still done manually. This process has the disadvantage of low efficiency, objectivity and the level of consistency. Therefore weneed a machine that can workautomatically to classify the quality of the green coffee by visual inspection. Theobjective of this study was to design the  green coffee sorting machine controlled by a computer based on image processing program consisted of conveyor belt, the image capture station used twodigital cameras, and the parallelsimulator divider. The design of sorting machine was used for the development of the green coffee sorting system that will categorizeinto four quality classes based on the qualifications according to the standard of SCAA ( Specialty Coffee Association of America). Keyword: Sorting Machine, green coffee, image procesing, computer programDiterima: 14 Juli 2010; Disetujui: 11 Oktober  2010
Rasio Input Energi dan Volume Reaktan pada Penerapan Ultrasonik untuk Pengolahan Biodiesel Bambang Susilo; La Chovia Hawa; Moch. Bagus Hermanto
Jurnal Keteknikan Pertanian Vol. 24 No. 2 (2010): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.788 KB) | DOI: 10.19028/jtep.024.2.%p

Abstract

Abstract The application of ultrasonic on biodiesel processing can increase the reaction rate and improve theconversion of plant oils into biodiesel. Factors affecting the rate of reaction on the application of ultrasonicwaves for biodiesel processing are temperature increasing, acoustic mixing, onset of cavitations andsurface tension on the micro bubble, and the formation of hot spots in the form of instantaneous pressureand high temperature on the molecular scale. The vibrator dipped into the reactants transferred mechanicalenergy which was transformed into heat, cavitations and hot spots. This research was conducted to seethe effect of the volume ratio of reactants and input energy on the rate of conversion of triglycerides intobiodiesel. The results of this study demonstrated a significant effect of the energy input to the conversion oftriglycerides into biodiesel. The greater specific input energy produced the higher conversion and the higherreaction rate. Input energy by using ultrasonic was significantly lower than the use of a mechanical stirrer. Keywords: ultrasonic, input energy, biodiesel, conversion rateDiterima: 14 Mei 2010; Disetujui: 28 September 2010  
Disain dan Pengujian Metering Device untuk Alat Penjatah Pupuk Granular Laju Variabel (Variable Rate Granular Fertilizer Applicator) Abdul Azis. S; Radite Praeko A. Setiawan; I Dewa Made Subrata
Jurnal Keteknikan Pertanian Vol. 25 No. 2 (2011): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.852 KB) | DOI: 10.19028/jtep.025.2.%p

Abstract

Abstract Uniform Rate of fertilizer Application (URA) practice is disregarding the productive potential of the various areas within the field. Thus, some area is less fertilized and other is over fertilized. It is also an important issue recently that nitrogen from fertilizers may be subjected to lost into atmosphere or enters streams  through surface or subsurface drainage (leaching). The place with over-fertilization will be a potential source of pollution in the form of ammonia (NH3), nitrite (NO2) and nitrate (NO3) which may hazard people health. Variable rate of fertilizer applicator is a solution to overcame the negative impact of URA. It can control the appropriate of fertilizer dosage and location of application in the field. The objective of this research is to design a metering device for variable rate granular fertilizer applicator. The result of variable rate fertilizer testing with single metering device with single rotor indicated that the rate of urea, SP-36 and NPK are 0.84, 0.96  and 1.2 g/rotation respectively. The testing with double rotor indicated that the rate of urea, SP-36 and NPK are 1.14, 2.22 and 2.1 g/rotation respectively. The all of the testing result indicated that metering device which designed can be applied with urea, SP-36 and NPK fertilizer. Keywords: granular applicator, metering device, PID controller, variable rate Abstrak Praktik penerapan pupuk laju seragan (URA) umumnya dilakukan tanpa  memperhitungkan potensi hasil pada berbagai lokasi lahan. Dengan demikian, sebagian luasan akan mendapatkan pupuk yang kurang sedangkan yang lainnya berlebihan. Selain itu belakangan ini ada isu yang menyatakan bahwa terjadi kehilangan unsur nitrogen dari pupuk akibat  penguapan  ke atmosfer atau mengalir bersama aliran air drainase permukaan atau bawah permukaan. Tempat yang dosis pupuknya berlebihan akan berpotensi menjadi sumber polusi dalam bentuk ammonia (NH3), nitrit (NO2) dan nitrat (NO3) yang akan mempengaruhi kesehatan manusia.  Aplikator pupuk laju berubah (variable) adalah solusi untuk mengatasi dampak negative dari URA tersebut. Mekanisme ini dapat mengatur dosis dan lokasi pemberian pupuk secara tepat pada lahan. Tujuan dari penelitian ini adalah merancang matering device untuk aplikator pupuk butiran laju berubah. Hasil pengujian alat pemberi pupuk laju berubah  dengan matering device tunggal dan rotor tunggal menunjukkan laju pemberian pupuk urea, SP-36 dan NPK adalah berturut-turut sebesar 0.84, 0.96 dan 1.2 gr/ putaran. Pengujian dengan rotor ganda menunjukkan bahwa laju pemberian pupuk urea, SP-36 dan NPK secara berurutan sebesar 1.14, 2.22, dan 2.1 gr/ putaran. Hasil dari keseluruhan pengujian menunjukkan bahwa matering device yang dirancang dapat dipergunakan untuk penerapan pupuk urea, SP-36 dan NPK. Kata Kunci: Aplikator butiran, matering device, Kontroler PID, dan laju berubah. Diterima: 03 Maret 2011; Disetujui: 05 Juli 2011 
Pengembangan Sistem Aquisis Data Kadar Nitrogen Tanah Berbasis Sensor Infra Merah Sebagai Pedoman Penentuan Dosis Pemupukan Abdul Roni Angkat; I Wayan Astika; Lenny Saulia
Jurnal Keteknikan Pertanian Vol. 25 No. 2 (2011): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (814.777 KB) | DOI: 10.19028/jtep.025.2.%p

Abstract

Abstract Site specific nitrogen fertilizing  needs an accurate map of soil nitrogen content. The use of sensors operated upon the soil is a promising method since the accurate soil sampling methods are costly and time consuming. The objectives of this research are to determine the relation between soil nitrogen level and near infrared spectrum using artificial neural network (ANN) and to develop soil nitrogen content data acquisition system for static dan dynamic measurement. The results showed that the 1506 nm wavelength can be used to estimate the soil nitrogen content. Furthermore it was found that static measurement showed a better correlation (R2= 0.6286) than the dynamic measurement (R2=0.3111). Combined with the developed ATMega32 microcontroller based display recorder, the precision of N content measurement achieved 0.12% wb with 0.1% wb noise. Keywords : NIR, soil nitrogen level, data acquisition, artificial neural network, precision farming Abstrak Pemupukan unsur hara nitrogen spesifik lokasi membutuhkan sebuah peta nitrogen tanah yang akurat. Penggunaan sensor untuk pengujian tanah dapat dijadikan alternatif menggantikan metode konvensional yang membutuhkan waktu yang lama dan biaya yang mahal. Penelitian ini bertujuan untuk membangun hubungan antara komposisi kadar nitrogen tanah dengan spektra Near Infrared (NIR) menggunakan jaringan saraf tiruan (JST) dan membuat sistem akuisisi data kadar nitrogen tanah pada pengukuran statis dan dinamis. Hasil penelitian menunjukkan panjang gelombang spesifik yang dapat digunakan untuk menduga kadar nitrogen tanah adalah pada panjang gelombang 1506 nm. Hubungan antara kadar nitrogen dan tegangan reflektan pada pengukuran statis menunjukkan hubungan yang lebih baik dengan R2 sebesar 0.6286 dibandingkan pada pengukuarn dinamis dengan R2 sebesar 0.3111. Simulasi sistem akuisisi data  kadar nitrogen tanah menggunakan mikrokontroler ATMega 32 yang dilengkapi dengan display memberikan ketelitian sebesar 0.12% berat dengan noise sebesar ±0.1 % berat. Kata kunci: NIR, kadar nitrogen tanah, akuisisi data, Jaringan Saraf Tiruan, pertanian presisi.Diterima:28 Juni 2011 ; Disetujui: 26 September 2011

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