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Alfonsius Thomas
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Agriculture, Biological Sciences & Forestry

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PENGARUH PUPUK DAUN DAN NAUNGAN TERHADAP PERTUMBUHAN BIBIT GAHARU Gyrinops verstegii (Gilg) Domke DI BAWAH CEKAMAN AIR. Anggreine H. Mentang; Johan A. Rombang; Marthen T. Lasut; Alfonsius Thomas
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.
ANALISIS POTENSI TEGAKAN HUTAN RAKYAT JENIS CEMPAKA DI DESA KAWATAK KECAMATAN LANGOWAN SELATAN Nurbaya Waisaley; Alfonsius Thomas; Wawan Nurmawan
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

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

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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.
LAJU RESAPAN BIOPORI PADA BEBERAPA TIPE TANAH BIOPORIAL APPROACHRATE IN VARIOUS SOIL TYPES Lidia Anike Pandeirot; Josephus I Kalangi; Alfonsius Thomas
COCOS Vol. 10 No. 5 (2018)
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
Co-Authors Alfons Patandung Anggreine H. Mentang Etivera Safuf Fabiola B. Saroinsong Faris Andong Fince Aibekob Hengki D. Walangitan JOHAN A. ROMBANG Josephus I. Kalangi Lidia Anike Pandeirot Marcel J. R. Ratag Marthen T. Lasut Martina A. Langi Noldy R. Kumendong Nurbaya Waisaley Ramli Sapsuha Reynold P. Kainde Safrin Titdoy Wawan Nurmawan Ziman F. Dekme Zulfitri Lawe