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Alfonsius Thomas
Fak. Pertanian Unsrat

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Pengaruh pemupukan NPK terhadap pertumbuhan bibit jabon putih Anthocephalus cadamba (Roxb.) Miq. Sapsuha, Ramli; Thomas, Alfonsius; Lasut, Marthen T.; Rombang, Johanes A.
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
LAJU RESAPAN BIOPORI PADA BEBERAPA TIPE TANAH BIOPORIAL APPROACHRATE IN VARIOUS SOIL TYPES Pandeirot, Lidia Anike; Kalangi, Josephus I; Thomas, Alfonsius
COCOS Vol 1, No 3 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.24358

Abstract

ABSTACT  The city of Manado annually experiences flooding in certain areas caused by changes in land use, a cycle of reduction in river capacity, and public awareness in disposing of garbage and maintaining a very low environment. The study was conducted at four locations namely Pandu subdistrict,Rurukan sub-district,Kali village and Matungkas village. In order to determine the rate of water absorption and the minimum amount of biopore infiltration holes in four different soil types. From this research, it is expected to be able to provide information for the government and the developing community to be taken into consideration in efforts to prevent flooding and minimize surface runoff. The method in this study uses a factorial randomized design as a method of retrieving data which is then analyzed using an analysis of two way variants. The results of the study show that the rate of recharge has a significant effect on the level of depth, and type of soil. The highest absorption rate is in the regosol soil type and at a depth of 75 cm. Keywords : Biopori, Floods, Biopore Infiltration Holes
KARAKTERISTIK DAERAH TANGKAPAN AIR SUNGAI MALALAYANG SULAWESI UTARA Ratag, Marcel J. R.; Tasirin, Johny S.; Thomas, Alfonsius
COCOS Vol 6, No 2 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i2.6793

Abstract

ABSTRACTTHE CHARACTERISTIC CATCHMENT AREA OF MALALAYANG RIVER NORTH SULAWESIThis research aim to identify the characteristics catchment area of Malalayang river. This research was done from february until march 2012 at catchment area of Malalayang river. The methods in this research is doing by observations to the area to verification and collect the data in some sample representative area. Sample point observable are in Air Panas catchment area, Warembungan catchment area and Tomohon catchment area. This research show the closure of the land in sub watershed Malalayang is dominated by estate mixed with broad area 2941.95ha, settlement population 583.11ha, forest area 534.18ha, grass area 306.3ha, field area 190.92ha and free area 71.55ha. the speed of water in Air Panas catchment area 234.0 m3/hour, the speed of water in Warembungan catchment area 831.6 m3/hour and the speed of water in Tomohon catchment area 882.0 m3/hour. The result of the regression equivalen is y = 0.217x + 339.59 with r2= 0.5107.Key words; water catchment area, land over, water discharge
ANALISIS POTENSI TEGAKAN HUTAN RAKYAT JENIS CEMPAKA DI DESA KAWATAK KECAMATAN LANGOWAN SELATAN Waisaley, Nurbaya; Thomas, Alfonsius; Nurmawan, Wawan
COCOS Vol 1, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20868

Abstract

ABSTRACT Cempaka a large evergreen tree species, is one of well-know timber grow in the community forest of North Sulawesi, including in Kawatak Village, South Langowan District, Minahasa Regency. Cempaka Wasian in Sulawesi Could be divided into two  species of Magnolia genus, which are Magnolia Sulawesiana and Magnolia Tsiampacca. This research aims to discover the forest stand’s potential of cempaka in Kawatak Village, South Langowan District, Minahasa Regency. The data were collected by generating sample plots with a target of 20 sample plots taken from 12 plantations with the size of 20 x 20 m plot area. In general, the existing community Forest in Kawatak Village is mixed  planting pattern model spreading farmers’  land. The average volume of people‘s plantations are 185.63³ with the average volume of plantations stand of 1.177,54 m³.  Keywords : Community Forest, Cempaka Potential, Kawatak Village.
PENGARUH PUPUK DAUN DAN NAUNGAN TERHADAP PERTUMBUHAN BIBIT GAHARU Gyrinops verstegii (Gilg) Domke DI BAWAH CEKAMAN AIR. Mentang, Anggreine H.; Rombang, Johan A.; Lasut, Marthen T.; Thomas, Alfonsius
COCOS Vol 7, No 3 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i3.12152

Abstract

ABSTRAKThis research aims to know the influence of leaf fertilizers and shade on the growth ofGyrinops verstegii (Gilg) Domke under water stress. This research was conducted in the greenhouse of Faculty of Agriculture, University of Sam Ratulangi Manado, from June to August2013. Spit plot design is used in this research. Shade as main plot consists of two levels,namely: 1 layer of paranet N1 (light intensity ± 40%) and 2 layers of paranet N2 (lightintensity ± 16%). Doses of fertilizer as sub-plot consists of 3 levels: P0 as a control (nofertilizer), P1 0.012 g/plant and P2 0.024 g/plant. The fertilizer was given every week for 2months. The effects of both shading and fertilizer treatments were not significant on plantheight and stem diameter under water stress.Keywords: Gyrinops verstegii, water stress.
STUDI RIAP CEMPAKA ELMERRILLIA OVALIS (MIQ.) DANDY DI PINARAS DAN MASARANG Lawe, Zulfitri; Kalangi, Josephus I.; Thomas, Alfonsius; Rombang, Johan A.
COCOS Vol 4, No 1 (2014)
Publisher : COCOS

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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
SISTEM AGROFORESTRI DI DESA TOLOK SATU KECAMATAN TOMPASO KABUPATEN MINAHASA Titdoy, Safrin; Thomas, Alfonsius; Saroinsong, Fabiola B.; Kainde, Reynold P.
COCOS Vol 5, No 2 (2014)
Publisher : COCOS

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Abstract

ABSTRACTAgroforestry systems whICH are applied to each region may differ, these differences are influenced by the condition of land, social and cultural. This study aimed to describe the agroforestry systems in Tolok Satu Kecamatan Tompaso Kabupaten Minahasa. The researth was conducted in three weeks starting on August 26, 2013 until 14 September 2013. Farmers who apply agroforestry systems were interviewed based on questionnaire. Their farm lands were surveyed then. The results of this study, there are two patterns of agroforestry systems adopted by the farmers whics are agrisilvikultur and agrosilvopastoral pattern. Forestry trees (cempaka) and agricultural crops (corn, beans, bananas, tomatoes, kidney beans, sweet potatoes, cassava, cloves and coconut),were planted with regular spacing. Livestock kept by farmers such as cows and horses, were tied to the land where the agroforestry system is applied during the day.Key words : Agroforestry System
DAYA TARIK WISATA ALAM BUKIT DOA MAHAWU TOMOHON BERDASARKAN ASPEK PENGUNJUNG Aibekob, Fince; Saroinsong, Fabiola B.; Langi, Martina A.; Thomas, Alfonsius
COCOS Vol 5, No 1 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i1.4934

Abstract

ABSTRACT This research aims to know the profile, spreading, and the level of visitor’s satisfaction in tourism area of Bukit Doa of Mahawu Tomohon along the year of 2012 and 2013. The visitors spread is analysed based on monthy visit data during 2012-2013 for two years. The level of visitor’s satisfaction and development advice is got by interviewing and questioner filling.This research was done in natural tourism area of Bukit Doa of Mahawu in Tomohon, North Sulawesi province. The material used in this research is the questioner’s paper.The visitor’s profile is analysed based on the home, gender, age, education level, job, kind of vehicle, and the way to visit. The visitor’s perception about tourism fascination was got from the interview result and questioner filling. Based on the research done, the visitors of Tourism object of Bukit Doa of Mahawu are satisfyied enough and even come of them are very satisfyied. The amount of the visitors in the year of 2012 and 2013 were 90.327. The most visitors coming was on march 2013 that was 11.217 visitors while the least was on February 2013 that was only 4066 visitors.
ANALISIS VEGETASI DI KAWASAN AGROWISATA GUNUNG TUMPA Andong, Faris; Saroinsong, Fabiola B.; Thomas, Alfonsius; Nurmawan, Wawan
COCOS Vol 6, No 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8393

Abstract

ABSTRACT VEGETATION ANALYSIS IN AGROWISATA AREA OF MOUN TUMPA  This study was to determine the composition and structure of plants in the Region Agro Mount Tumpa. The methods used sguare line with a line. Plot size of 2 m × 2 m for seedling phase, 5 m × 5 m for phase stake, 10 m × 10 m to 20 m mast and phase × 20 m for phase tree. There are 15 plots in three transect observations were cut lengthwise contour lines, the distance between plots of 50 m, and the distance between lines of 100 m. Observation data trunk diameter of 130 cm height from ground level, the name of plant species and number of individuals per species. To obtain the importance value index is calculated density, dominance, and frequency. Based on the results, 40 species and 29 families of trees in the phase of the tree, tree, saplings and seedlings. Of the highest importance value index of tree species Spathodea campanulata phase with (IVI 59,00%), in the phase of pole types which have the highest importance value index Artocarpus altilis types have the (IVI 44.52%), type that have the highest importance value index of phase stake is Piper aduncum with (IVI 37.17%). As for the types that have the highest IVI seedling phase is kind Adenostoma viscosum with (IVI 76.19%).  Keywords: Important Value Index, Analysis Vegetation Agrowista Mountain Region Tumpa.
PENGARUH PEMBERIAN PUPUK KOMPOS TERHADAP PERTUMBUHAN BIBIT JABON MERAH (Anthocephalus macrophyllus) Safuf, Etivera; Thomas, Alfonsius; Rombang, Johan A.; Kalangi, Josephus I.
COCOS Vol 6, No 17 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i17.9840

Abstract

ABSTRACT  This research studies the effects of compost fertilizer on the growth of red jabon (Anthocepalus macrophyllus) seedling. The method used is completely randomized design, with 5 treatments and 5 replications. No (zero) compost was applied on treatment A as a control, 25 grams of compost on treatment B, 50 grams of compost on treatment C, 75 grams of compost on treatment D, and 100 grams of compost on treatment E. Based on recommendation, growth media used in this research was a mix of soil and sand, with a ratio of 3:2. Variables observed were increase in plant height, increase in stem diameter, increase in number of leaves, and the dry weight of shoot. Results showed that the application of compost fertilizer to red jabon seedling made significant differences in the increase of plant height and stem diameter. Key words: red jabon seedling (Anthocephalus macrophyllus) compost fertilizer  zeorganik