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All Journal EUGENIA Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Teknologi Pertanian (Agricultural Technology Journal) COCOS
David P. Rumambi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Materials Science & Nanotechnology Physics

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RANCANG BANGUN SISTEM KONTROL OTOMATIS SENSOR KELEMBABAN TANAH PADA MEDIA TANAM POLYBAG Deivana Kamagi; David P. Rumambi; Leo H. Kalesaran
COCOS Vol. 15 No. 2 (2023): EDISI APRIL-JUNI 2023
Publisher : Universitas Sam Ratulangi

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AbstactSoil Moisture is the amount of water stored between the pores of the soil. Soilmoisture conditions are very dynamic, this is caused by absorption through the soilsurface of transpiration and percolation. Knowing the differences in surface soilmoisture can help optimize soil management in a field, so that productivity can bemaintained. Water obtained by the soil consists of two ways, namely naturally fromrainwater and artificial processes such as irrigation. One of the factors that affectsoil moisture is watering. Watering is something that cannot be released inmaintaining soil moisture. One effort that can be done is to provide irrigation water,namely by using an automatic system based on a microcontroller using sensors to dowatering according to water needs without having to use human power/operators.This research was conducted at the Greenhouse of the Faculty of Agriculture,University of Sam Ratulangi for one day. Data collection was carried out at intervalsof two hours with three treatments namely A 70% humidity standard, B 80% humiditystandard, C 90% humidity standard indicating that the irrigation system using theArduino Uno microcontroller can detect changes/decreases in soil moisture in theexperimental polybags, and can respond and command watering activities to restorerelative humidity conditions.Keyword : soil moisture, humidity, automatic control
RELEVANSI EVALUASI PENGELOLAAN DAERAH IRIGASI TALAWAAN MERAS PROVINSI SULAWESI UTARA Friska Anastasya Saki; Leo Kalesaran; David P. Rumambi
COCOS Vol. 15 No. 2 (2023): EDISI APRIL-JUNI 2023
Publisher : Universitas Sam Ratulangi

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AbstractThe objectives of this research were:: 1) to obtain information about evaluationin the Talawaan Meras Irrigation Area, 2) To evaluate the Management of IrrigationNetworks in the Talawaan Meras Irrigation Area. This research was carried outdirectly in the field and data collection was carried out using survey methods andinterviews with several selected respondents, as well as measurement/calculation ofthe characteristics of variables related to irrigation networks carried out directly onthe research object. The conclusions from this study are (1) The research location ofMS.3.Kr, which was originally 20 ha for rice fields, now the designation is no longerrice fields, but inland fisheries. (2) Measurement of water discharge in the secondarychannel at the MS.3.Kr location uses the float method, and the average dischargeobtained is 0.16 m^3/second. (3) The existing irrigation structures in the TalawaanMeras Irrigation Area are all in good condition and can function properly. (4) Theplanting season determined by the Agriculture Service is not in accordance with thefacts on the ground. (5) In the last 2 years, performance evaluation in the TalawaanMeras Irrigation Area on MS.3.Kr has not been carried out properly due to a lack ofoperational funds. Funds that should have been there have been focused on Covid-19funds. (6) There are 9 irrigation network officers in Talawaan Meras, but not all ofthem are active. At the MS.3.Kiri location, there is only one irrigation network officerwho has taken over all the tasks at that location.Keywords : evaluation, irrigation area management, Talawaan Meras
ANALISIS KELAYAKAN EKONOMI ALAT SANGRAI KOPI TIPE SILINDER DESA LIBERIA KECAMATAN MODAYAG KABUPATEN BOLAANGMONGONDOW TIMUR Panigoro, Fregi Hariyanto; Rumambi, David P.; Ludong, Daniel P.M.
COCOS Vol. 16 No. 2 (2024): EDISI APRIL-JUNI 2024
Publisher : Universitas Sam Ratulangi

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Tujuan penelitian ini adalah untuk mengetahui data kinerja kelayakan ekonomi dari operasi mesin sangrai kopi mencakup (NPV, B/C, dan IRR). Penelitian ini dilakukan di Desa Liberia Kecamatan Kecamatan Modayag Kabupaten Bolaang Mongoondow Timur dengan kapasitas kerja mesin setiap penyangraian 3 kg. Hasil analisis kelayakan ekonomi diperoleh NPV Rp 8.304.379, B/C 1.24, IRR 40% yang dicapai pada tahun ke 5. Kata Kunci: Analisis Kelayakan Ekonomi, NPV, B/C, dan IRR
ANALISIS KELAYAKAN EKONOMI ALAT PENGOLAHAN NIRA AREN MENJADI GULA SEMUT SECARA TRADISIONAL DI DESA WANGA KECAMATAN MOTOLING TIMUR Momongan, Fransiska Oktavia; Molenaar, Robert; Rumambi, David P.
COCOS Vol. 16 No. 2 (2024): EDISI APRIL-JUNI 2024
Publisher : Universitas Sam Ratulangi

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Absract Tujuan penelitian adalah untuk menganalisis kelayakan ekonomi alat pengolahan nira aren menjadi gula semut secara tradisional di Desa Wanga Kecamatan Motoling Timur. Hal itu dilakukan berdasarkan permasalahan yang timbul di desa tersebut yaitu  belum pernah ada yang menganalisis proses pengolahan yang dilakukan secara tradisional dari segi kajian ekonomi penerapan dalam hal biaya total dan kelayakan ekonomi atau finansialnya. Berdasarkan kondisi di atas, alat pengolahan nira aren menjadi gula semut perlu dilakukan analisis ekonomi pada biaya total selama proses pengolahan gula semut dan kelayakan ekonomi yang dinilai   dari 4 kriteria yaitu BEP, NPV, B/C RATIO, dan IRR. Metode penelitian yang digunakan adalah pengumpulan data dilakukan dengan teknik survei yang diperoleh dari kuesioner dan wawancara serta teknik observasi yang diperoleh dari pengamatan di lapangan. Hasil perhitungan analisis kelayakan ekonomi pada alat pengolahan nira aren menjadi gula semut secara tradisional diperoleh hasil perhitungan biaya total sebesar Rp. 39.967/jam. Berdasarkan kondisi operasional di lapangan diperoleh nilai NPV lebih dari 0 yaitu Rp. 57.548.411, nilai B/C Ratio lebih dari 1 yaitu 1.422 dan nilai IRR lebih dari discount rate yaitu 198%. Sedangkan untuk BEP operasional alat pengolahan nira aren menjadi gula semut secara tradisional berada pada tingkat operasi 2.625 liter nira/tahun atau setara dengan Rp. 2.798.465/tahun yang artinya pada titik tersebut jumlah produksi atau jumlah penjualan mencapai titik impas sehingga alat pengolahan nira aren menjadi gula semut secara tradisional layak secara ekonomi. Kata kunci : Analisis kelayakan ekonomi, pengolahan tradisional, gula semut.
Co-Authors Amalludin S. Kono Batin E. Tuwuilu Daniel Ludong Daniel Ludong, Daniel Daniel P.M Ludong Daniel P.M. Ludong Dedie Tooy Deivana Kamagi Farano M. Pongoh Farano M. Pongoh, Farano M. Friska Anastasya Saki Haiqal B. Rivai Herry F. Pinatik Hildy Wulur Indry E, Karundeng Johannes E. X. Rogi Kristianto Pisu Leo H. Kalesaran Leo Kalesaran Ludong, Daniel P. M. Momongan, Fransiska Oktavia Moningka, Christian N. G. Mukhlis Paembonan, Fijar Y. Panigoro, Fregi Hariyanto Putria G. Rompas Robert Molenaar Ruland Rantung Sandra E. Pakasi Sandra Pakasi Stehvani Regina Sigar Stevano F. X. Hariawan Tulung, Ronaldo Vilian F. Tumober