Article Per Year (5 Year)
p-Index From 2021 - 2026
1.873
P-Index
This Author published in this journals
All Journal Jurnal Hortikultura Indonesia (JHI) Agromet Jurnal MIPA EUGENIA Buletin Palma Jurnal Agroekoteknologi Terapan AGRI-SOSIOEKONOMI COCOS
Johannes E. X. Rogi
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Environmental Science Mathematics Physics Social Sciences

Published : 37 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 37 Documents
Search

 1   2   3   4 
PENGATURAN JARAK TANAM PADI (ORYZA SATIVA L.) PADA SISTEM TANAM JAJAR LEGOWO Sakti Karokaro; Johannes E.X. Rogi; S. David Runtunuwu; Pemmy Tumewu
COCOS Vol. 6 No. 16 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i16.9570

Abstract

ABSTRACT The purpose of this study was to determine the effect of plant spacing on growth and yield of paddy Legowo row planting system. The study was conducted in South Minahasa District, District Tompaso New, Village Torout for 4 months from April - August 2014 in this study used materials rice seed Bulawan, taken from the village of Torout (one's own). Research was conducted using a randomized block design (RAK) with 5 treatments spacing grown using Legowo row planting system 2: 1. Each treatment was repeated four times, namely 1) 20 x 20 cm (control), 2) 20 x 20 cm, 3) 20 x 25 cm, 4) 20 x 30 cm, 5) 20 x 35 cm. Using the method of using the F test and if there is a treatment effect followed by a test of Least Significant Difference (LSD) at 5%. Spacing of rice that gives the best results are rice treated with a spacing of 20 x 25 cm Legowo row planting system. Keywords :jajar legowo, rice
Pendugaan Evapotranspirasi Bulanan Tanaman Padi Sawah dengan Menggunakan Model Simulasi Tanaman di Kabupaten Jayawijaya Provinsi Papua Yitenus Tabuni; Jelie Viekson Porong; Johannes E.X. Rogi
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20573

Abstract

ABSTRACT   Rice is the second staple supplies in Jayawijaya Regency of Papua product beside Sweet potato. The area of rice plant is 250 ha, with production of 655 tons (BPS data from the Department of Agriculture of Food Crops and Horticulture of Papua Province 2014). The total area of Jayawijaya Regency is 13,925.31 km2 which is administratively divided into 40 districts with 4  Kelurahan, and 328 Villages. The Population area 241. 280 inhabitants. Most of the people live on slope of the hills  whith are difficult to reach and are of temhisby long dryness. The estimation of the evapotranspiration in this research uses a plant simulation model. The purpose of this simulation model has advantages, among others, does not require a long time to utilize the results and cost efficient in terms of cost. This study aims to estimate the monthly evapotranspiration of wetland rice crops in Jayawijaya Regency Papua Province by using shierary rice.Ve2 2, 1. The results of research can be used as a tool for cultivating rice crops especially for water management. The growth model is a simple representation of the plant growth system described in the mathematical model and analyzed statistically. The advantages are derived from the using of model simulations, that such as can shorten the time to predict the potential of crop production.  Keywords: Evapotranspiration estimation of field and model results
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
Pengukuran Ketajaman Ground Sampling Distance (GSD) Di Berbagai Ketinggian Lahan Sawah Dengan Menggunakan Drone Tipe Mavic 2 Pro Di Desa Matani Kecamatan Tumpaan Lamia, Franly J.I.; Rogi, Johannes E.X.; Tiwow, Diane
AGRI-SOSIOEKONOMI Vol. 19 No. 1 (2023): Agri-Sosioekonomi
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.99 KB) | DOI: 10.35791/agrsosek.v19i1.46751

Abstract

Drones are a solution for getting data efficiently and effectively. The drone is also equipped with a flight control system through waves, ground positioning system (GPS) precision navigation, and flight control electronics so that it can fly according to the autopilot flight plan. The purpose of this study was to measure the sharpness of the Ground Sampling Distance (GSD) at various heights of paddy fields using the MAVIC 2 PRO TYPE Drone in Matani Village, Tumpaan District. The results of the research on measuring the acuity of the Ground Sampling Distance (GSD) in paddy fields using the MAVIC 2 PRO TYPE Drone in Matani Village, Tumpaan District show that flying altitude affects GSD results where the higher the drone altitude, the greater the GSD value and the lower the altitude. fly, the clearer the photos obtained. It is better to measure the sharpness of the Ground Sampling Distance (GSD) in the afternoon above 9 am because the sun's lighting affects the quality of the photo at a height of 200 meters so that the photo is clear.
Analisis Anomali Iklim Dalam Hubungan Dengan Produksi Padi Sawah (Oryza sativa L .) Di Kabupaten Minahasa Utara Rogi, Dianita; Rogi, Johannes E.X.; Runtunuwu, Semuel
AGRI-SOSIOEKONOMI Vol. 19 No. 1 (2023): Agri-Sosioekonomi
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.321 KB) | DOI: 10.35791/agrsosek.v19i1.46854

Abstract

This study aims to look at the relationship between rainfall and lowland rice production in North Minahasa Regency from 2010 to 2020, and this research was carried out from August to October 2021. Data collection was taken using secondary data, and presented in the form of tables and graphs. The study used polynomial regression analysis using order 6 and Microsoft Excel 2016 software. The results showed that the rainfall in 2010-2020 in North Minahasa Regency fluctuated every year. The highest rainfall occurred in 2016, namely 5,322 mm and low rainfall occurred in 2015, namely 2,730 mm, the highest lowland rice production occurred in 2020, namely 8.32 tons/ha and the lowest rice production in 2010, namely 4.89 tons/ha. Based on the results of the analysis, it was found that R2 = 0.7218, which means that the correlation value is good and rainfall has a very good effect on the growth of paddy rice plants.
Pengaruh Jenis Dan Konsentrasi Auksin Terhadap Pertumbuhan Dan Perkembangan Tanaman Anggrek Dendrobium mirbelianum Secara In Vitro Galensong, Justio P.D.; Tilaar, Wenny; Rogi, Johannes E.X.; Lengkong, Edy F.; Walingkas, Stanley A.F.; Inkiriwang, Annatje E.B.
AGRI-SOSIOEKONOMI Vol. 20 No. 2 (2024): Agri-Sosioekonomi
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/agrsosek.v20i2.57367

Abstract

This study aims to determine the effect of auxin type and concentration on the growth and development of orchid plants. The research was conducted at the Tissue Culture Biotechnology Laboratory, Faculty of Agriculture, Sam Ratulangi University Manado, and was carried out over 2 months from July to August 2023. This study used a factorial experiment in a Completely Randomized Design (CRD) with 5 replications consisting of two factors. The first factor is the type of auxin: IAA (A1), NAA (A2), and IBA (A3), and the second factor is the concentration of each auxin: 1 ml/l (K1), 2 ml/l (K2), and 3 ml/l (K3). The data were analyzed using analysis of variance, and if the results were significant, a 5% Least Significant Difference (LSD) test was conducted. The results showed that there was an interaction between the type and concentration of auxin on variables such as the number of roots, root length, root emergence time, number of leaves, number of shoots, and shoot height. Similarly, there was an effect of auxin concentration on each type of auxin, but there was a significant effect of individual auxin types (IAA, NAA, and IBA) on the root formation of Dendrobium mirbelianum orchids, affecting variables such as the number of roots, root length, root emergence time, number of leaves, number of shoots, and shoot height.
PENGARUH PEMBERIAN PLANT GROWTH PROMOTING RHIZOBACTERIA (PGPR) PADA PERTUMBUHAN BIBIT STEK STEVIA (Stevia rebaudiana Bertoni) Gabai, Maria; Sumayku, Bertje R.A.; Tulungen, Antje Grace; Tilaar, Wenny; Rogi, Johannes E. X.; Walingkas, Stanley A.F.
EUGENIA Vol. 30 No. 3 (2024): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.v30i3.58773

Abstract

Sweetleaf stevia (Stevia rebaudiana Bertoni) is one of the potential sugar-producing plants besides sugar cane which is widely used as a natural non-calorie sweetener. Propagation of stevia by shoot cuttings produces more uniform seedlings. Plant Growth Promoting Rhizobacteria (PGPR) contains a group of beneficial bacteria that live in the plant root ecosystem that can stimulate plant growth. This study aims to determine the effect of PGPR on the growth of stevia cuttings and the best concentration of PGPR on the growth of stevia cuttings. This study was conducted in February-May 2024 in Kolongan Atas II Village, Sonder District, Minahasa Regency, North Sulawesi Province. The study used a Completely Randomized Design (RAL), with 5 treatment levels, namely P0 = Control (Without PGPR), P1 = PGPR 10 ml/liter of water, P2 = PGPR 20 ml/liter of water, P3 = PGPR 30 ml/liter of water and P4 = PGPR 40 ml/liter of water. Each treatment was repeated 4 times.The results showed that the aplication of PGPR affected the growth of stevia cuttings. The best PGPR concentration for the growth of stevia cuttings was at a PGPR treatment concentration of 20 ml/liter of water.  Keywords: plant growth promoting rhizobacteria, stevia
Co-Authors A. LUMINGKEWAS Aan A. Daradjat Antoneta Kartini Kotangon Augus Y. M. Sumajow Augus Y. M. Sumajow, Augus Y. M. Benjamin H. Mailangkay Bertje R. A. Sumayku Bonaventura R. Lienargo Budi Utomo Mondolu Charissa Maria Simbawa Chintya Gita Sartika Modeong Daniel Murdiyarso Daniel P. M. Ludong David P. Rumambi David S. Runtunuwu Diane Tiwow Dianita Rogi Edy F. Lengkong Farida Fattah, Farida Frangki Sambeka Frangky J. Paat Franly J.I. Lamia Gabai, Maria Galensong, Justio P.D. Greydi F. H. Punusingon Handoko Handoko Hanny S. G. Kembuan Indry E, Karundeng Inkiriwang, Annatje E.B. J. H. Palendeng J. H. Panelewen J. I. KALANGI J. Tatuh Jantje ., Pongoh Jeanne . Paulus Jeanne M. Paulus Jeanne Martje Paulus Jelie Viekson Porong JOHAN A. ROMBANG Josephus I. Kalangi Kaeng, Silvana E. Kotangon, Antoneta Kartini Lamia, Franly J.I. Langimanapa S. Demmassabu Malsupri Taher Mariam M. Toding, Mariam M. Marjam Toding Marjam Toding, Marjam Master R.L. Sirait Meity R. Rantung Olivia Komansilan Pemmy Tumewu Peter Rene Hosang Pongoh, Jantje ., Rifaine M.N. Erungan Rifaine M.N. Erungan, Rifaine M.N. Robert . Robert Robert Rogi, Dianita Runtunuwu D. S. Runtunuwu, Semuel S. D. Runtunuwu S. David Runtunuwu S. TUMBELAKA Sakti Karokaro Sakti Karokaro, Sakti Samuel D. Runtunuwu Selvie . Tumbelaka Selvie . Tumbelaka, Selvie . Selvie G. Tumbelaka Semuel D. Runtunuwu Semuel D. Runtunuwu Semuel Runtunuwu Silvana E. Kaeng Siska J. Frans Sitti Wakiah Sofia Wantasen Stanley A.F. Walingkas Sumayku, Bertje R.A. Tiwow, Diane Tulungen, Antje Grace W. Rotinsulu Wakiah, Sitti Wenny Tilaar Yefta Pamandungan Yefta Pamandungan Yitenus Tabuni Yorri Y. J. Sanger YULIA PASKALINA Yunnita Rahim