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All Journal Jurnal Hortikultura Indonesia (JHI) EUGENIA Buletin Palma Jurnal Ilmiah Sains AGRI-SOSIOEKONOMI Silvarum COCOS

JOHAN A. ROMBANG

Fak. Pertanian Unsrat

Author-ID : 363614

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Economics, Econometrics & Finance Environmental Science Mathematics Physics Social Sciences

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SKENARIO PEMANFAATAN LAHAN DI KECAMATAN MAPANGET BERDASARKAN ZONE AGROEKOLOGI DENGAN MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS (SIG) Antoneta Kartini Kotangon; Johannes E. X. Rogi; Johan A. Rombang
AGRI-SOSIOEKONOMI Vol. 12 No. 2A (2016)
Publisher : Sam Ratulangi University

This study aimed to develop land use scenarios in District Mapanget using Agroecology Zone-based Geographic Information System (GIS). The data used in this study are primary data and secondary data. Primary data were collected through surveys and direct observations in the field. The activities carried out field surveys to obtain state information field through taking pictures with a digital camera. Analysis of social data and data on potential farming is also done through the compilation of data to map the District Mapanget. Furthermore biophysical data agro-ecological, social and agricultural potential of the data compiled in a database system was using Quantum GIS program version 1.8. This study found that the use of agricultural land to non-agricultural land in the district Mapanget very difficult to avoid due to the low value of land from the agricultural sector compared to other sectors. So based on the evaluation conducted by comparing the map with a map of the existing condition of the District RTRW 2014-2034 Mapanget then it changes the function of which is no longer appropriate region where the agricultural area have been converted into non-agricultural. In order for this condition continues to be bad for the environment and agriculture will require efforts in the management and development in the District Mapanget, among others, the development of urban agriculture, every development in Sub Mapanget should always refer to the scenario Land use and Spatial plan of the District Mapanget that there are both carried out by the government, private or public. Urban agriculture has an important role for urban communities that suggested the need for land use scenarios in District Mapanget. Based on agroecological zone map and a map of the District RTRW 2014-2034 Mapanget then be collated Mapanget the District land use scenarios are divided by 3 (three) scenarios that city Scenario, Scenario frame the city, urban-rural scenario. The existence of land / space urban agriculture plays an important role in agricultural production systems and maintain the quality of the environment, because it is a major determinant spacious RTH (green open space) and the results of urban agriculture. In addition, urban farming provides employment and a source of additional revenue as well as environmentally sustainable society.

EVALUASI LAHAN UNTUK PENGEMBANGAN LAHAN PERKEBUNAN DI PULAU BACAN KABUPATEN HALMAHERA SELATAN Sitti Wakiah; Johan A. Rombang; Johannes E.X. Rogi
AGRI-SOSIOEKONOMI Vol. 12 No. 2A (2016)
Publisher : Sam Ratulangi University

The research objective was to determine the suitability of land for a certain class of agricultural crops, namely, vanilla, oil palm, coconut, cocoa, nutmeg and cloves and to determine the direction of the crop land use. The study used survey method and analysis is to compare with criteria data suitability of land for plantation crops. Based on the results obtained twenty eight overlay land units and land units nineteen taken as a sample. The results show the suitability of land in Bacan Island of South Halmahera District for commodity crop plantations vanilla, oil palm, coconut, nutmeg and cloves in a class of land suitability is quite suitable (S2), cocoa belongs to a class of land suitability is marginally suitable (S3) with limiting factor the relative humidity. Economic analysis for all commodities is very suitable for development and Bacan Island of South Halmahera Regency.

PENGARUH TIPE TUTUPAN LAHAN TERHADAP IKLIM MIKRO DI KOTA BITUNG Yorri Y. J. Sanger; Rino ., Rogi; Johan A. Rombang
AGRI-SOSIOEKONOMI Vol. 12 No. 3A (2016)
Publisher : Sam Ratulangi University

This study aimed to analyze the effect of land cover types to micro-climate of and analyze the effect microclimate to the trees and open land towards amenities environment for human. The City of Bitung has selected as a research site because it planned for mega projects. They are Special Economic Zones (KEK), International Relations Ports and Manado-Bitung Highways. The research used primary and secondary data. The parameters measured for each land cover includes the elements of microclimate namely: Air Temperature, Humidity and Solar Radiation. Data analysis using techniques T test, F test and Analysis of amenities based on the data of air temperature and humidity, it can be calculated by Temperature Humadity Index (THI). The measurement results microclimate taken at four different land cover that is at the city park, Central Business District (CBD), housing and industry. The results of this study prove the hypothesis that there are differences in the average value of the temperature and humidity in the trees, open land. Tree vegetation structures more effectively reduce the air temperature. The structure of the vegetation canopy of trees that have rounded and more densely branched patterns, height being between 6-10 m and serves to overshadow proved more effective in improving amenities in the surrounding area. Based on the value of THI, all land cover both parks, CBD, residential and industrial categorized uncomfortable because the average is at a value> 27. Housing area has very little green space. One of the efforts to improve the quality of the microclimate in order to enhance the user experience is to provide a good environment garden by planting vegetation predominant tree combined with shrubs and grasses to balance and harmonize between buildings and the environment also have aesthetic value. In the industrial area, the high levels of air pollution resulting from the production process so that recommended a good landscape arrangement, by expanding area of town forest and planting vegetation of trees that can absorb large numbers of pollutants result in healthy and fresh air for the region.

PEMANFAATAN LAHAN DI KECAMATAN RATAHAN, KECAMATAN RATAHAN TIMUR DAN KECAMATAN PASAN KABUPATEN MINAHASA TENGGARA BERDASARKAN ZONA AGROEKOLOGI DENGAN MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS Astri Vandalia Elisabeth Naray; Johan Alexander Rombang; Jaelani ., Husain
AGRI-SOSIOEKONOMI Vol. 15 No. 2 (2019)
Publisher : Sam Ratulangi University

This study aims to determine the direction of land use in Ratahan Subdistrict, Ratahan Timur and Pasan, SoutheastÂ Minahasa Regency, based on the Agroecology Zone using the application of Geographic Information Systems (GIS). The type ofÂ research used in this study is quantitative research with a method of data and spatial interpretation. The types of data used in theÂ study are primary data and secondary data. The data generated is arranged in the form of information and spatial. The studyÂ was conducted in 3 (three) subdistricts namely Ratahan Subdistrict, Ratahan Timur Subdistrict and Pasan Subdistrict, SoutheastÂ Minahasa Regency, North Sulawesi Province, which were included in 1 (one) sub-district, Ratahan Sub-district. While theÂ implementation time in April to June 2018. Analysis of the data used in this study where the resulting data is arranged in theÂ form of data and spatial information, then compiling and analyzing data using the Quantum ArcGIS version 10.2 programÂ application. Besides that, biophysical data analysis and agricultural potential data will be carried out. The results of the studyÂ based on the concept of land use in Ratahan Subdistrict, East Ratahan and Pasan results of agroecological zone maps using GISÂ obtained 32 zones from the results of analysis of soil type and slope data and climate type. The results of the analysis of theÂ allocation in accordance with the conditions of land use (land cover) as well as the output of the map of Southeast MinahasaÂ Regency RTRW space map in 2013, the agroecological zone can be divided into two main uses, namely protected zone andÂ cultivation zone. In protected areas recommended in protected forests, water catchment areas, river borders and lake bordersaround the springs. Whereas in the cultivation area it is recommended to use land for agroforesty, rice fields, settlements, mixedÂ farming, conservation settlements, plantations and production forest.*eprm*

PERANAN PENGGUNAAN LAHANDI AREA TANGKAPAN SUNGAI SUNGEAN TERHADAP EUTROFIKASI DANAU TONDANO Santi . Lumingkewas; Johan A. Rombang; Josephus I. Kalangi; Fabiola B. Saroinsong
COCOS Vol. 2 No. 1 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i1.731

ABSTRACTEutrofication is one of the water pollution that caused by the increase ofthe consentrate of nutrient. This research studied conducted in catchment area ofSungean river sub DAS Noongan, Kab. Minahasa. The objective of this studywere to quantify the eutroficationâ€™s rapid, in this case the value of Nitrogen andFosfor that caused by any land uses in catchment area of Sungean river sub DASNoongan.This research studied was done by taking the sample of water andquantifying water discharge in some point which had been chosen alongcatchment area of Sungean river that represent various land use. Then theconcentrate of N and P in water sample was analyzed in BARISTAND laboratory.Then the data of N and P That transported from each land uses, was analyzed instatistic with using Randomized Block Design (RBD) and spatial analisis(arcview).The result of research study showed that, each land uses gave effect tothe increase of lake eutrofication. Were in Tondano Lake from Sungean river forN was about 467,1076 mg/day and P was about 5,961849 mg/day. The biggestcontribution of N and P was from residential area, it was 464,2352 mg day-1 ha-1dan 5,961849 mg day-1 ha-1.Keywords : Eutrofikasi, Nutrient, River Of Sungean, Landuse

PEMBERIAN PUPUK DAUN TERHADAP PERTUMBUHAN BIBIT Gyrinops caudata (Gilg) Domke ( Granting Of Leaf Growth Fertilizer Seed Gyrinops caudata (Gilg) Domke ) Sumanto Basahona; Marthen T. Lasut; J. A. Rombang; Alfonsius Thomas
COCOS Vol. 2 No. 3 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i3.1222

ABSTRACTGyrinops caudata is one of gaharu plant family Thymeleaceae no less quality than the other speciesin Indonesia. Foliar fertilizers are inorganic fertilizers Gandasil D macro and micro, and a specialpowder for vegetative growth of plants. The purpose of this study was to determine the effect offoliar fertilizers on the growth of seedlings Gandasil D Gyrinops caudata by using completelyrandomized design (CRD) with 4 treatments and 5 replications. Treatment A concentration of 0 g / lof water, the treatment of B concentration of 2 g / l of water, (0.012 g dose), treatment Cconcentration of 4 g / l of water, (0.024 g dose) and treatment D concentration of 6 g / l of water,(dose 0.036 g). The variables measured were plant height increment, diameter increment in thenumber of stems and leaves. The results showed that the application of fertilizer to the seed leavesGandasil D Gyrinops caudata give significantly different results at high accretion, increased stemdiameter and in the number of leaves. Treatment D with a concentration of 6 g / l of water, (0.036 gdose) showed good results in plant growth compared with the other treatments.Key words : Gyrinops caudata, Agarwood, leaf manure Gandasil D

Kajian potensi Lahan dan Prospek Pengembangan Beberapa Komoditas Pertanian di dataran Tinggi Napu Kabupaten Poso Budi Utomo Mondolu; Johannes E.X. Rogi; Johan Rombang
COCOS Vol. 3 No. 5 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i5.2617

SUMMARY IDevelopment of the agricultural sector in the Highlands Napu based on the potentialand prospects of the development of agricultural land is not maxiEized, becausemanagement saw the pot"ntiut of less farm land but only at thE prospect ofcommodities so that the land does not produce potentially imposed on certaincommodities. The management of other agricultural land but only saw the potential ofnot reviewing the outlook for the market may lead to difficult for farrners to markettheir production land. Relationship potential and prospects of the development ofagricultural land can affect the production of several agricultural commodities.Potential development of land in accordance with the production of agriculturalcommodities will increase the prospects of better agricultural development. Thepurpose of this study is to assess the potential of land and development prospectsAgriculture of some commodities in the Highlands Nup,r, Poso district.Research methodology used is the field of survey research methods andlaboratory analysis methods as well as analysis of agricultural commodity 4. Potentialassessed land based on field survey equipped with GPS and use of laboratory analysisof the primary data and then analyzed with analysis consisted of location LocationQuotien (LQ); quotients Localization (LO) and quotients Specialization (KS) usingsecondary data obrtained from some institutions associated with research. Analysis ofthe prospects for agricultural development consisting of paddy rice, maize, cabbageand tomatoes using analysis of supply (production trend and the trend of land area),and the Economic Analysis (the ratio of R / C) Z 1.The results showed that agricultural land Plateau Napu Poso production anddevelopment prospects of agricultural commodities is less than optimal because it hasa land suitability class 52 and 53. Paddy rice, maizg cabbage and tomatoes can yieldoptimal production if done countermeasures limiting factors of agricultural landsuitability. Based on land unit No. I and II prospected best value is on tomatoescommodity, land unit No. I1 and III prospected best value on cabbage commodity,land unit No. IV, V, V[, VII prospected best value on Paddy rice commodity. Maizecommodities has been inconstant value from more land unit. Maize commodities hasbeen to be a support for others commodity. From this study it can be concluded thatthe potential of land Plateau Napu have land suitability categories 52 and 53 asinfluenced by certain limiting factors, to increase agricultural production anddevelopment prospects of the limiting factors of land suitability can be addressedproperly. Suggestions can be submitted namely: farmers need to pay attention to thefactors limiting agricultural land suitability, such as alternative penang&ulanan veryhigh rainfall in a'ivay good drainage, nutrient retention by appropriate fertilizationand crop rooting medium with a good way of cultivation

BEBERAPA SIFAT FISIK GUBAL ANGSANA (Pterocarpus indicus) Belly Ireeuw; Reynold P. Kainde; Josephus I. Kalangi; Johan A. Rombang
COCOS Vol. 3 No. 6 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i6.2715

ABSTRACT This research was to study about some physical properties of angsana (Pterocarpus indicus) sapwood related in wood position to wood position in trunk (base, middle, and tip) and to environmental factors (temperature and humidity). It used a faktorial design in completely randomized block with combinations of 3 environmental condition and 3 wood position in trunk. These nine treatments are repeated three times. The results showed that moisture content, wood density, and volumetric shrinkage of angsana sapwood could be influenced by wood position in trunk (base, middle, and tip). The swelling property of angsana sapwood was not influenced by wood position in trunk but it was influenced by environmental factors. Key words : physical properties, sapwood, wood position, temperature, humidity

STUDI RIAP CEMPAKA Elmerrillia ovalis (Miq.) Dandy DI PINARAS DAN MASARANG Zulfitri Lawe; Josephus I. Kalangi; Alfonsius Thomas; Johan A. Rombang
COCOS Vol. 4 No. 1 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i1.3592

ABSTRACCommunity forests around Masarang and Pinaras are dominated by stands of E. ovalis (Miq.) Dandy. Theincrement is usually used to express the of increase of stand volume in a specified time unit. This study is aimedto determine the average annual increment of E. ovalis in community forests of Masarang and Pinaras. Thisresearch was conducted in the villages of Masarang and Pinaras. The method used was the comparison of twoindependent samples in two different locations with three replications. The method used was the diameter andheight was measured on 198 E. ovalis trees in Pinaras and 251 E. ovalis trees in Masarang. The results of theanalysis concluded that there was no difference between the increments for E. ovalis in Masarang and Pinaras.Soil fertility, soil texture, and altitude in the 2 locations did not become prohibitive factors for the growth of E.ovalis.Keyword: E. ovalis, Increament, Pinaras, Masarang

Pengaruh pemupukan NPK terhadap pertumbuhan bibit jabon putih Anthocephalus cadamba (Roxb.) Miq. Ramli Sapsuha; Alfonsius Thomas; Marthen T. Lasut; Johanes A. Rombang
COCOS Vol. 6 No. 6 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i6.8043

ABSTRACTInfluence fertilization of NPK to growth of Jabon Putih seeds Anthocephalus cadamba (Roxb.) Miq.This research studied the effect of NPK (15 : 15 : 15) on seedlings growth of Anthocephalus cadamba. The research used Randomized Block Design (RBD) with five treatments and five replications. Treatment A as a control, treatment B 0,25 g NPK/plan, treatment C 0,50 g NPK/plant, treatment D 0,75 g NPK/plant and treatmen E 1 g NPK/plant, given every two weeks for two months. Plant media of this research was soil, sand and chicken manure with ratio7 : 2 : 1 based on volume. The measured variables were crop height, crop bar diameter and the number of leaf. The results showed that the applications of NPK fertilizer on Jabon putih seedling gave significantly different result to the crop height accretion at firstand second weeks and for the crop bar diameter at seventh week and eighth week, while the number of seedling leaf of Jabon Putih was not significantly different. The growth of crop was better in treatment C comparing to the other treatments.Keyword : Jabon Putih, NPK 15 : 15 : 15

Co-Authors A. LUMINGKEWAS A. Thomas Abdul M. Muhammad Abdul M. Muhammad, Abdul M. Adenancy A. Montjai Adenancy A. Montjai, Adenancy A. Alfonsius Thomas Alfonsius Thomas Alfonsius Thomas Anggraini F. M. Pandeirot Anggreine H. Mentang Anggreine H. Mentang, Anggreine H. Antoneta Kartini Kotangon Astri Vandalia Elisabeth Naray Ayu Natia H. Djufri Belly Ireeuw Budi Utomo Mondolu Christomus Bode Christomus Bode, Christomus Claudio Bonifasius Etivera Safuf Etivera Safuf, Etivera Fabiola B. Saroinsong Fajar Gemilang Sahman Habdi Selpia Habdi Selpia, Habdi Hanny S. G. Kembuan Ikasapta Ramehiang J. I. KALANGI Jaelani ., Husain Johannes E. X. Rogi Josephus I. Kalangi Joshephus I. Kalangi KALANGI, J. I. Kalangi, Josephus Kotangon, Antoneta Kartini LUMINGKEWAS, A. Makarawung, Jerry Malsupri Taher Maria Y.M.A. Sumakud Marthen T. Lasut Marthen T. Lasut Marthen T. Lasut Marthen Th. Lasut Martina A. Langi Meity Rantung Mirna Umagapi Mirna Umagapi, Mirna muriany, vinolya Prisilia Nonong Krisnawati Loha Nurmawan, W. Pangemanan, Euis F. S. PASKALINA, YULIA Prayitno Prayitno Putra, Imam Syah R. Kainde Ragentu, Deris Wijayanti Ramli Sapsuha Reynold P. Kainde Reynold P. Kainde Rinna Mamonto ROGI, JOHANNES E.X. Rogi, Rino ., S. TUMBELAKA Sanger, Yorri Y. J. Santi . Lumingkewas Sapan, Hagi Sitti Wakiah Sukarman Sukarman Sumanto Basahona Sumanto Basahona Telah, Heinsy A.J. Timur Kogoya Timur Kogoya, Timur TUMBELAKA, S. Wakiah, Sitti Walangitan, H. D. Wowor, Andre E. Yorri Y. J. Sanger YULIA PASKALINA Yusran Ilyas, Yusran Zulfitri Lawe

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