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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

Abstract

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 eutrofication’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

Abstract

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

Abstract

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

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

Abstract

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

Abstract

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
RIAP Gyrinops verstegii (Gilg) DOMKE PADA LAHAN DENGAN KEDALAMANMUKA AIR TANAH YANG BERBEDA Mirna Umagapi; Euis F.S. Pangemanan; Johan A. Rombang; Marthen Th. Lasut
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8389

Abstract

ABSTRACT    This research was done to study the increment of Gyrinops versteegii on lands with different levels of ground water depth, a shallow groundwater depth (45-50 cm) at A location and a deep groundwater depth (90-98 cm) at B location. This study used comparative method and purposive sampling. Variables observed were the increase in trunk diameter and free- branch heigtht of Gyrinops. The number of plant sample used was 6 (six) plants, three (3) plants for each location. The measurement of trunk diameter was done, using a measuring tape, at the base of the stem or at 30 cm from the ground. Free branch height was measured from the base of the stem up to the height of the first branch. These observations were done once a month for a year. The results showed that the growth of plants in two locations had differences in trunk diameter and free-branch height from the first month until the last month of observation. The average increments of trunk diameter and free-branch height in the B location were greater than in the A location. Keywords: increment, the ground water  level, Gyrinops versteegii
PERTUMBUHAN Gyrinops caudata (Gilg) Domke PADA LAHAN DENGAN KEDALAMAN MUKA AIR TANAH YANG BERBEDA Habdi Selpia; Johan A. Rombang; Marthen T. Lasut; Josephus I. Kalangi
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8395

Abstract

ABSTRACT   This research studiet the growth of Gyrinops caudata on land with tho different ground water depths, around 45 - 50 cm below soil surface at A location  and 90 - 98 cm below surface at B location.  The method used in this study was a comparative method and the determination of plant samples was carried out in accordance with the purpose of the research (purposive sampling).  The measured variables were trunk diameter and the height of free branch trunk.  The number of samples measured in this study were 6 (six) trees, three (3) trees in A location and three (3) trees in B location. Trunk diameter was measured using a measuring tape at a height of 30 cm from the ground and the free branch trunk height was measured from the ground up to the first branch.  Measurements were carried out once a month in one year.  The results showed that increments in the trunk diameter and the free branch trunk height at B location were greater than at A location. Keywords: Growth Gyrinops caudata, Agarwood, Agarwood tree, Growth Rate.
PEMANFAATAN SISTEM INFORMASI GEOGRAFIS (SIG) DALAM PENGKLASIFIKASIAN BAHAYA EROSI PADA DAS TALAWAAN PRAYITNO PRAYITNO; Johny S. Tasirin; Maria Y.M.A. Sumakud; Johana A. Rombang
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8455

Abstract

ABSTRACT Talawaan watershed is one of the most important watershed in North Minahasa Regency. Erossion in the Talawaan watershed results in decreasing land resource quality caused by both natural and human activities. This research aims to study the erosion hazard level in Talawaan watershed. Method to calculate erosion rate is based on USLE equation (Wischmeir and Smith, 1978) utilizing Geographic Information Systems (GIS). Result shows that the erossion hazard levels in Talawaan Watershed were “very light” 2.791,56 ha (21,49%), “light” 4.019,46 ha (30,94%), “medium” 3.127,86 ha (24,08%), “heavy” 2.521,79 ha (19,41%), and “very heavy” 528,88 ha (4,07%). Talawaan watershed has an average erosion rate of 60.53 tonnes/ha/year which is “medium” erosion hazard level. The results of this study may be used to a better management plan of Talawaan watershed. Keywords: TBE, GIS, USLE, DAS Talawaan. 
ANALISIS PERUBAHAN TUTUPAN LAHAN DI TAMAN HUTAN RAYA GUNUNG TUMPA MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS Christomus Bode; Fabiola B. Saroinsong; Johny S. Tasirin; Johan A. Rombang
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8486

Abstract

ABSTRACK  This research presents land cover conversions on Mount Tumpa Forest Park within the 2007-2014 period; what was converted, where it happened, and how big those conversions were. The results shows that there are six classes of land cover, namely secondary forest, teak forest, buses, farm fields, mixed plantation, and coconut plantation. That there were a variety of conversions between classes in all observed villages : (1) secondary forest to coconut plantation, mixed plantation, bushes and fields (5.90%), (2) mixed plantation to bushes (0.23%), (3) coconut plantation to mixed plantation (0.61%), (4) fields to mixed plantation, bushes and secondary forest (4.74%). Even though some areas classified as bushes and farm fields were converted into secondary forests, the conversion of secondary forests to other classes (coconut plantation, mixed 2  plantation, bushes, and fields) is bigger in comparison, thus causing a decrease of the forest area by 1.03 ha.Or  175.13 to 174.10 ha between 2007-2014.   Keywords: Forest area decrease, land cover conversion, GIS
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