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yohanes - setiyo, yohanes -
Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana
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Documents
PENGARUH PEMBERIAN KOMPOS PADA BUDIDAYA TANAMAN KACANG TUNGGAK TERHADAP ERODIBILITAS TANAH

BETA (Biosistem dan Teknik Pertanian) Vol 1, No 1 (2013): Februari
Publisher : Universitas Udayana

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Abstract

Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh pemberian kompos padabudidaya kacang tunggak terhadap erodibilitas tanah. Penelitian ini juga diharapkan dapatmemperbaiki sifat fisik tanah dan mengurangi erosi suatu tanah. Rancangan yang digunakan adalahRancangan Acak Kelompok di mana perbandingan tanah dan kompos terdiri dari 6 tingkatan yaitutanah 100%;  97,5% tanah : 2,5% kompos; 95% tanah : 5% kompos; 92,5% tanah : 7,5% kompos;90% tanah : 10% kompos; 87,5% tanah : 12,5% kompos; dan 85% tanah :15% kompos. Penelitiandiulang sebanyak 3 kali. Parameter yang diamati dalam penelitian ini adalah sifat fisik tanah antaralain: struktur tanah, permeabilitas tanah, tekstur tanah, dan sifat kimia tanah yaitu bahan C-organiktanah, maupun penentuan nilai erodibilitas tanah. Hasil penelitian ini menunjukkan bahwa perlakuankompos pada tanah dalam budidaya kacang tunggak berpengaruh nyata terhadap tekstur tanah,permeabilitas tanah, dan bahan C-organik tanah tetapi tidak berpengaruh nyata terhadap strukturtanah. Hasil penelitian menunjukkan perbandingan tanah dan kompos pada budidaya kacang tunggak85% : 15% merupakan perlakuan terbaik untuk mendapatkan nilai erodibilitas tanah yang rendah.

OPTIMALISASI PROSES FERMENTASI URIN SAPI MENJADI BIOURIN

BETA (Biosistem dan Teknik Pertanian) Vol 1, No 2 (2013): Agustus
Publisher : Universitas Udayana

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Abstract

Telah dilakukan penelitian mengenai fermentasi urin sapi menjadi biourin. Tujuan penelitian ini adalah mengoptimasi proses fermentasi urin menjadi biourin dengan pemberian starter dan gula merah. Penelitian ini menggunakan Rancangan Acak kelompok pola faktorial 2 faktor dengan 3 taraf perlakuan. Faktor pertama berupa perlakuan konsentrasi starter Rumino bacillus dengan konsentrasi 0 ml, 15 ml dan 30 ml. Faktor kedua adalah perlakuan gula merah 0, 15 dan 30 g. Masing-masing perlakuan di ulang sebanyak 3 kali. Variable yang diamati adalah pH, total asam, total padatan terlarut, C-organik dan N-total. Hasil penelitian menunjukan bahwa penambahan starter R. bacillus sejumlah 15 - 30 ml dan gula merah 15 - 30 g dalam 1.500 ml urin sapi dapat mempercepat produksi biourin dalam  proses fermentasi urin sapi yang diambil dari Simantri nomor 225. Umur urin sapi sebelum diproses yaitu satu hari dari saat dikeluarkan oleh sapi dewasa. Proses fermentasi dilakukan selama 7 hari dapat dipercepat menjadi 5 hari, hal ini ditandai dengan stabilnya nilai pH, total asam dan total padatan terlarut mulai hari ke-5. Konsentrasi starter  R. bacillus 30 ml dengan penambahan gula merah 30 g pada 1.500 ml urin sapi yang difermentasi merupakan perlakuan optimal yaitu nilai pH 6, total asam 0,5%, total padatan terlarut 3,80Brix. Hal ini didukung oleh standar dari Permentan Nomor 70 dengan nilai pH 4 - 9. Namun, penelitian untuk nilai C-organik dan N-total belum cukup memenuhi standar Permentan yaitu C-organik 6% dan N-total 3-6%

MODIFIKASI MESIN PENCETAK PAKAN BUDIDAYA LELE BERBENTUK PELLET DENGAN KEBUTUHAN DAYA RENDAH

BETA (Biosistem dan Teknik Pertanian) Vol 2, No 1 (2014): Februari
Publisher : Universitas Udayana

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Abstract

The aim of this study were to modify the machines with a small power requirements for printing fish feed pellets and to test the performance of the machine. The modified engine was a machine design by Giyarto result , modifications was on the power requirements . Stages of modification were calculate the strength of each major component of the engine , and followed by selecting the machine components . The main components of the machine are : V-belt, pulley, cylinder, cutting knife, pressing pellets and an electric motor. Engine performance testing conducted with 7 kg of dough pellets and the test was repeated 5 times. Parameters measured in this study were: machine capacity, efficiency and quality of the work machine. The results showed that the pellet-making machine modified increased in performance. The machine indicated the performance efficiency of an average 87.53 %

ANALISIS PROFIL SUHU PADA GREENHOUSE TIPE ARCH UNTUK BUDIDAYA BUNGA KRISAN (Chrysanthemum morifolium)

BETA (Biosistem dan Teknik Pertanian) Vol 4, No 1 (2016): Maret
Publisher : Universitas Udayana

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Abstract

This research was describe about temperature profile on Arch Greenhouse with the curved shape of roof and square wall for Chrysanthemum (Chrysanthemum morifolium) that cultivated on Arch Greenhouse. The aims of this research were to obtain a temperature profile on arch greenhouse, to determine the building height of arch greenhouse which suit for chrysanthemum cultivation. Height treatments of greenhouse was separated by 3 levels i.e. 2.5 m, 3.0 m, and 3.5 m. Chrysanthemum seeds varietys used in this research was Fiji white. To measure the temperature used temperature and humidity meter. Temperature measurement carried out by 2 times start from a week before planting (empty condition) and plant age was 45 days after planting. Doing the measurement on morning, noon, and afternoon. Analysis data of temperature was done with interpolation to determine profile contour line of analysis temperature. The result showed that there are the different shape and contours distribution profile of microclimate for difference height. The level of growth plan on each treatments showed a better productivity on greenhouse with height 2.5 m when compared with the others. Greenhouse with height 2.5 m produced flower quality which suit as the SNI with average of height plan was 81.93 cm, grooming age was 46 days, amount flower was 5 florets per stem, flower wide was 44.26 cm, and dry weight was 13.11 gram

PENGEMBANGAN ALGORITMA IMAGE PROCESSING UNTUK MENDUGA HASIL PANEN PADI

BETA (Biosistem dan Teknik Pertanian) Vol 3, No 1 (2015): Februari
Publisher : Universitas Udayana

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Abstract

The aims of this research were to develop image processing algorithm that can be used for rice yield estimation. This research consist of: 1) image acquisition, 2) image analysis with Adobe Photoshop Cs 4 and MATLAB R2009B, and 3) make the algorithm that suitable for rice yield estimation. This research was testing three method of image processing, i.e. manual pre-processing, thresholding method, and shape of Structuring Elements (SE). Forming algorithm was done by analyzing image yield and be compare with real image. More like image yield with real image, then this method was suitable for doing rice image analysis. The result of analysis showed that process of rice image analysis have to be started with manual pre-processing, using custom thresholding method, and morphology with SE shape disk. The result image of the algorithm showed the most appropriate grain image with real image, and there’s no more image that identified as a grain. Based on number of pixel, the image yield of this method is 117.407 pixel. In conclusion, the algorithm for estimation of rice yield, consist of: image acquisition, manual pre-processing, gray scaling, thresholding custom, morphology with SE shape disk, image resize, and calculation of the number of pixel grain.