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All Journal Jurnal BETA (Biosistem dan Teknik Pertanian)
Yohanes Setiyo
Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Rancang Bangun Alat Pemanen Buah Salak Sederhana Dewa Bagus Putu Prabha Diptaya; Ida Bagus Putu Gunadnya; Yohanes Setiyo
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 2 (2020): September
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2020.v08.i02.p16

Abstract

Salak (Salacca edulis, Reinw) which its fruits known as snake fruit is a kind of palm plant that grows in the highlands. Tree of snake fruit has stems with many thorns and has long and thorny stalks. Its fruit bunches are closed to the tree, so it is not easy to harvest and to get intact fruit bunches. The purpose of this research was to design a simple and manually operated harvester so that it can speed up the harvesting time of operator. This tool had a sickle-shaped cutting knife and a net to catch underneath. The handle of the cutter and handrail sticks were made of aluminum pipe material. This tool functionally cut one snake fruit bunch and the bunch felt right in the net so that the damage of the fruit bunch could be minimized and shortened the harvesting time. Harvester was tested by 5 operators that harvesting 10 trees each. Collected data was analyzed by using descriptive method and the results showed that the designed harvesting tool worked well with the effectiveness of intact harvested fruit bunch was about 84,0% and with average harvesting time of 8,31 minutes
Pendugaan Intensitas Serangan Penyakit BLB (Bacterial Leaf Blight) pada Tanaman Padi melalui Pendekatan Citra Multispektral Gusti Bagus Eka Chandra; I Made Anom S. Wijaya; Yohanes Setiyo
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 2 (2020): September
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2020.v08.i02.p18

Abstract

Bacterial Leaf Blight (BLB) is a disease that is dangerous for rice plants. This disease can attack in every phase of growth. Calculation of BLB disease attack intensity is currently still used manually method. Technology development is needed in estimating the intensity of BLB disease through multispectral imagery. This study aims (1) to get the best correlation value between the intensity of BLB disease attack with multispectral image parameters (2) to get the equation for estimating the intensity of BLB based on multispectral images parameter. Drone DJI Inspire 1 with a multispectral camera is used to captured the paddy field. The captured images was processed using Agisoft Photoscan and QGIS 3.8 software. Based on the results of the acquisition, multispectral images produce red, NIR, green, red edge, RGB band images which were then transformed into NDVI, EVI, and NDRE images. Of the threemultispectral image parameters, NDVI values have a stronger correlation level with a determination coefficient of 97.5% and produce the following linear equation y = -419.6 + 169.3. In calculating the NDVI parameter error value has the lowest error value compared to the EVI and NDRE parameters which is 4.64% with an accuracy estimate of 95.36%. Multispectral imagery can be used in estimating the intensity of BLB disease attacks in rice plants because it produces a very strong correlation value, and high estimation accuracy with a low error value does not exceed 10%.
Pengomposan Sampah Canang dengan Model Pengomposan di Wadah Berbentuk Silinder I Made Dwijantara Putra; Yohanes Setiyo; Sumiyati
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 1 (2020): April
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2020.v08.i01.p10

Abstract

The problem of rubbish left over from religious ceremonies in Bali such as canang cannot be overcome optimally, especially processing it into compost. This study aims to determine the diameter of the composting basket that is able to produce the best composting process and get the cylinder diameter of the composting container that is able to produce good quality in compost made from canang waste.Experiments with 3 treatments compost basket diameter are p1 = diameter 20 cm, p2 = diameter 40 cm, p3 = diameter 60 cm, with a height of each basket 100 cm. Using a ratio of canang waste: cow manure 1: 1. Analysis was carried out in the Soil Science Laboratory, Faculty of Agriculture, Udayana University. The composting process lasts for 30 days with composting temperatures ranging from 29 ° C to 56 ° C and composting at pH ranging from 4 to 6.5. The physical form of compost has resembled brownish black soil. In general, the quality of compost produced from five is treated in accordance with SNI 19-7030-2004 with the final result of a basket diameter of 60 cm. Temperature of 36.2 ̊C; pH 6.7; carbon 12.74%; nitrogen0.95% and C / N ratio of 13.05%.
Pengaruh Penambahan Urea dan Pemanasan terhadap Produksi Biogas Kadek Mila Adiani; Ida Bagus Putu Gunadnya; Yohanes Setiyo
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 1 (2020): April
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2020.v08.i01.p11

Abstract

Biogas is one of the energy sources originating from livestock waste, besides being environmentally friendly and known as renewable energy, it can also be used for sustainable energy. Biogas is a mixture of gases resulting from an anaerobic fermentation process from livestock manure such as from cow dung. The purpose of this study was to determine the effect of various urea concentrations and heating on biogas production. This study applied a completely randomized design (RAL) with two factors, namely: urea addition (2%, 4%, 6%, and 8%) to media and heating such as heating and without heating. Observations was carried out on temperature of fermentation media, biogas, CO2, volume of methane gas, and time of biogas formation. Analysis of variance showed that all observed parameters were significantly affected (P< 0.05) by treatment interaction of urea concentration and media heating. The results showed that the interaction of 8% urea addition to media and heating treatment became the best treatment in producing biogas, with the characteristics of biogas volume of 16.67 ml, CO2 volume of 0.08%, methane volume of 15.49 ml at the 35th of fermentation day, and needed 10 days of fermentation to produce biogas.
Co-Authors Dewa Bagus Putu Prabha Diptaya Gusti Bagus Eka Chandra I Made Anom S. Wijaya I Made Dwijantara Putra Ida Bagus Putu Gunadnya Kadek Mila Adiani Sumiyati