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All Journal EUGENIA Jurnal Teknologi Pertanian (Agricultural Technology Journal) COCOS
David P. Rumambi
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Agriculture, Biological Sciences & Forestry Computer Science & IT

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DESAIN PETA SISTEM IRIGASI TANAMAN PADI SAWAH (ORYZA SATIVA L.) DI DESA BUSISINGO KECAMATAN SANGKUB KABUPATEN BOLAANG MONGONDOW UTARA Indry E, Karundeng; Johannes E.X. Rogi; David P. Rumambi
COCOS Vol. 13 No. 3 (2021): EDISI JULI-SEPTEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i4.35040

Abstract

ABSTRACTThe objectives of this study are 1). Calculate the flow rate of water. 2).Calculate the value of infiltration, percolation, evaporation and evapotranspiration.3). Make an irrigation design map for rice fields. This study uses direct datacollection methods in the field and uses secondary data. Collecting data directly inthe field and using secondary data. The results showed that based on secondarycalculation data, the water discharge value in December was 60.00 m3/second,January 97.5 m3/second and February 95.00 m3/second. Based on the data obtained,the average water loss due to infiltration is 9.64 cm/hour = 2.31 mm/day, percolationis 3.0 mm/hour = 71.9 mm/day and evaporation is 5.78 mm/day. To design anirrigation system, the effective water requirement for irrigating rice fields with anarea of approximately 50ha by reducing the initial water discharge with water lossdue to infiltration, percolation and evaporation by looking at the reference to existingdata, the results obtained are 37.88 m3/second to irrigate the land.Keywords: Irrigation, Map Design of Irrigation System
ANALISIS EKONOMI MESIN PERONTOK (POWER THRESHER) KEDELAI TIPE MPT 001 Putria G. Rompas; Robert Molenaar; David P. Rumambi
COCOS Vol. 13 No. 3 (2021): EDISI JULI-SEPTEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i4.35082

Abstract

AbstractThis study aims to analyze the economy, total costs and economic feasibilityof the soybean threshing process using the power thresher MPT 001 Type atLolah Satu Village, East Tombariri District, Minahasa Regency. Break evenpoint value or operational break even point of the power thresher MPT 001Type is at an operating level of 17.866,53 kg/year or equivalent to Rp.7.878.577/year. Analysis of the operational feasibility of the power thresherMPT 001 Type based on the amount of service potential available using acommercial scale calculation base is, resuted NPV value of Rp.302.056.654,69, the IRR of 195,982%, the B/C ratio of 1.4497. This conditionshows that the power thresher MPT 001 Type is economically feasible. Basedon the existing condition on site the machine does not fulfil the operationconditions that guarantee sustainability. The sensitivity analysis shows thatchanges in the level of working hours per year and the price of drying servicesare very influential on the feasibility of operations with the lowest level beingthe service price of 1.1 times the total cost of threshing services.Keywords: economics analysis. power thresher, soybean
KAJIAN PEMANFAATAN POMPA AIR BANTUAN PEMERINTAH UNTUK MENUNJANG IRIGASI PERTANIAN DI KABUPATEN Vilian F. Tumober; Leo H. Kalesaran; David P. Rumambi
COCOS Vol. 15 No. 2 (2023): EDISI APRIL-JUNI 2023
Publisher : Universitas Sam Ratulangi

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Abstract

AbstactThis research was conducted to determine the feasibility of using pumps infulfilling water for plants so that the farming system. Support for groundwaterirrigation by using pumps for farming activities in Minahasa Regency. Based onthe description above, research will be carried out on "Studies on the use ofgovernment-assisted water pumps to support agricultural irrigation in MinahasaRegency". The results showed that the most water pump assistance was providedin 2018 in Tombariri District, and the least in 2020 in Langowan and KakasDistricts were all donated to farmer groups. The pump assistance provided by thegovernment to farmer groups is the TWP 150 type of water pump, in reality in thefield the types of water pumps provided by the government are all the same,namely the Tanikaya TWP 150 water pump type with gasoline. Interview dataobtained from farmer groups receiving water pump assistance indicated that thereare two sources of water at the pump location, namely rivers and springs. Theresults of a survey conducted showed that the pump placement locations of allthose distributed were not placed in a certain place or no one used pump houses,because their use was carried out on a rotating basis so that the pumps wereplaced according to the needs in the field. The results obtained were that the useof government-assisted water pumps was not optimized properly because most ofthe assistance was not used properly or was rarely used, with the reason thatrainfall was insufficient and there were also pumps provided by the governmentthat the pump components were not complete, there were also pumps that hadbeen provided. switch to another tool.Keywords : Water pump, irrigation, utilization
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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Abstract

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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Abstract

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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Abstract

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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Abstract

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.
Pengaruh Kemiringan Talang Terhadap Pertumbuhan Tanaman Caisim (Brassica chinensis L var. parachinensis) dengan Menggunakan Sistem Hidroponik NFT (Nutrient Film Technique) sembiring, julian; Rumambi, David P.; Rantung, Ruland A.
Jurnal Teknologi Pertanian (Agricultural Technology Journal) Vol 16 No 2 (2025): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Jurnal Teknologi Pertanian (Agricultural Technology Journal)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.v16i2.66039

Abstract

Gutter slope is a crucial aspect of hydroponic systems, especially the nutrient film technique (NFT), which directly affects the flow of nutrient solution and plant root health. A proper slope ensures even nutrient flow throughout the gutter, providing equal access for each plant root to absorb nutrients and oxygen. The gutter slope, measured in percent, is derived from the length of the horizontal gutter. The purpose of this study was to gain a deeper understanding of the NFT (nutrient film technique) hydroponic system, particularly the slope of the gutter, and to analyze its potential applications. Three different slopes (T) were used in this study: (T1 = 6%, T2 = 9%, T3 = 12%).The study demonstrated the greatest plant growth at a 12% slope, with the highest plant height of 38.75 cm, an average root length of 35.3 cm, and an average fresh weight of 84.6 grams. However, the highest number of leaves was achieved at a 9% slope. Generally, a 12% slope yields the best results, with plant weight and height being crucial for production.
Co-Authors Amalludin S. Kono Batin E. Tuwuilu Daniel Ludong Daniel Ludong, Daniel Daniel P.M Ludong Daniel P.M. Ludong 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. Paembonan, Fijar Y. Panigoro, Fregi Hariyanto Putria G. Rompas Robert Molenaar Ruland Rantung Sandra E. Pakasi Sandra Pakasi sembiring, julian Stehvani Regina Sigar Stevano F. X. Hariawan Tulung, Ronaldo Vilian F. Tumober