Article Per Year (5 Year)
p-Index From 2020 - 2025
3.078
P-Index
This Author published in this journals
All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Jurnal Teknosains AGRIVITA, Journal of Agricultural Science Jurnal Belantara BAREKENG: Jurnal Ilmu Matematika dan Terapan JTAM (Jurnal Teori dan Aplikasi Matematika) Agrilan : Jurnal Agribisnis Kepulauan Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Jurnal Hutan Pulau-Pulau Kecil : Jurnal Ilmu-Ilmu Kehutanan dan Pertanian MAKILA: Jurnal Penelitian Kehutanan JURNAL HUTAN TROPIS Repong Damar: Jurnal Pengabdian Kehutanan dan Lingkungan Jurnal Karya Abdi Masyarakat BAKIRA: Jurnal Pengabdian Kepada Masyarakat MARSEGU : Jurnal Sains dan Teknologi Maanu : Jurnal Pengabdian Kepada Masyarakat
Gun Mardiatmoko
Jurusan Kehutanan Fakultas Pertanian Universitas Pattimura Ambon Jl. Ir. M. Putuhena, Kampus Poka Ambon 97237
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

Published : 34 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 34 Documents
Search

 1   2   3   4 
The Application of the Classical Assumption Test in Multiple Linear Regression Analysis (a Case Study of the Preparation of the Allometric Equations of Young Makila) Mardiatmoko, Gun
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 8, No 3 (2024): July
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v8i3.22179

Abstract

The preparation of allometric equations generally uses multiple linear regression equations. The use of this regression equation is usually not carried out through various tests but goes directly to the t test and F test stages. Therefore, this paper aims to provide an example of determining the regression equation through the classical assumption test stages. Makila (Litsea angulata BI) was chosen as an example because it provides environmental services, especially in dealing with climate change and has not been widely studied. The research method used is a quantitative method. Destructive sampling was taken and the material used consisted of 40 young Makila plants planted in polybags next to the greenhouse at the Faculty of Agriculture, Pattimura University, Ambon. The diameter of each sample was measured from the ground surface to a height of 5 cm and numbered 1 to 40. After being coded, the plant samples were cut down and all young trees were divided into stem segments, branches, twigs, leaves and roots. The root segments were collected carefully to facilitate their separation from the soil in polybags. The parts of the roots that still contain soil are cleaned with a machete and brush until they are free of soil and other dirt. Next, each segment was weighed for its wet weight (in g) and dry weight, thus enabling the determination of the biomass content (in g) for each segment. Data analysis was carried out using the Multiple Linear Regression Equation method. The regression model was examined for normality and suitability in predicting independent variables, ensuring there were no issues with multicollinearity, heteroscedasticity, and autocorrelation. The results of the normality test showed that the significance value for the remaining data was 0.813 > 0.05, indicating normal distribution. TThe results of the multicollinearity test show that there is no multicollinearity problem, this is indicated by the VIF value of the two independent variables (tree diameter and tree height each 1.049) < 10 and the Tolerance value (tree diameter and tree height 0.953 each) > 0.100. The results of the heteroscedasticity test show that the two independent variables have a significance value of more than 0.05. The results of the autocorrelation test show the Durbin Watson (DW) value = 1.956 with a range of 1.65 – 2.35 which means there is no correlation problem. The results yielded a multiple linear regression: Y = -1131.146 + 684.799X1 + 4.276X2, where Y is biomass, X1 is the diameter, and X2 is the tree height. Based on the results of the t-test: variable X1 partially affected Y while variable X2 partially had no effect on Y. The F-test indicated that variables X1 and X2 jointly affected Y with R Square: 0.919 or 91.9% and the rest was influenced by other unexplored factors. To simplify biomass prediction and field measurement, a regression equation that used only 1 independent variable, namely tree diameter, was used for the experiment. Allometric equation only used 1 variable, Y = - 1,084,626 + 675,090 X1, where X1 = tree diameter, Y = Total biomass with R = 0.957, and R square = 0.915. The regression equation for young Makila plant provides assurance that the regression equation obtained is accurate in estimation, unbiased and consistent. This is because in data processing classical assumptions have been tested. This equation can save time, costs and energy, as well as make measurements easier in the field so that future researchers can develop allometric equations in other plants for efficiency. 
PENDAMPINGAN MASYARAKAT DESA HUTAN (BINAAN PT. WWI) DALAM PENERAPAN METODE PENGUKURAN CADANGAN KARBON DI DESA WAPSALIT KABUPATEN BURU Mustamu, Sofia; Hatulesila, Jan W.; Mardiatmoko, Gun
MAANU: Jurnal Pengabdian Kepada Masyarakat Vol 2 No 1 (2024): Maanu Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/maanuv2i1p61-70

Abstract

Carbon reserves in forests play a crucial role in climate change mitigation and the preservation of global ecosystems. Forests act as primary absorbers of carbon dioxide (CO2) from the atmosphere, storing carbon in the biomass of trees, soil, and leaf litter. This community service aims to provide understanding and education to the public about carbon storage, factors influencing storage capacity, and the implications of sustainable forest management. The methodology used includes direct measurement of carbon reserves in various forest types and the analysis of secondary data from scientific literature. Survey results indicate that the village forest of Wapkalit still has significant potential, emphasizing the need for community awareness to continue managing and preserving the forest. Socialization conducted through the FGD (Focus Group Discussion) method can directly impart knowledge to the community.
MITIGASI PERUBAHAN IKLIM MELALUI PENGHIJAUAN DI RUANG TERBUKA HIJAU SMA NEGERI 3 MALUKU TENGAH Sitanala, Merlin Renny; Tjoa, Marthina; Mardiatmoko, Gun
MAANU: Jurnal Pengabdian Kepada Masyarakat Vol 2 No 1 (2024): Maanu Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/maanuv2i1p35-40

Abstract

The reforestation activity carried out at Senior High School 3 Central Moluccas Suli Village was by planting Ketapang kencana, pucuk merah, and mahoni seeds. Apart from that, durian dan pala seeds were also handed over for teacher and student to take home. PKM activities were carried out at senior high school based on the teamn’s proposal to carry out greening the school area. The proposal was well received by the school ang the team members carried out a survey to see the condition of the school and prepare seeds the were suitable for planting for school reforestation, and the seeds would be taken home by teachers and students to be planted on their respective land. Then the planting activity was caried out, information was also provided regarding climate change mitigation efforts through greening the school environment. The principal, teachers, and student were enthusiastic about planting the seeds provided by the team ang those who came home. They hope that by the reforesting the school area, they can create a beautiful and cool learning environment while also realizing climate change mitigation.
PENDAMPINGAN KELOMPOK TANI HUTAN DAN PENGELOLAAN HUTAN DESA SECARA PARTISIPATIF DI DESA MASIHULAN KECAMATAN SERAM UTARA Hatulesila, Jan W; Mardiatmoko, Gun; Mustamu, Sofia
MAANU: Jurnal Pengabdian Kepada Masyarakat Vol 2 No 2 (2024): Maanu Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/maanuv2i2p20-28

Abstract

The community engagement program with forest farmer groups and forest managers in Masihulan Village aimed to enhance the community's capacity to sustainably manage forest resources and strengthen the local economy through the diversification of non-timber forest products. A participatory approach was employed in this assistance process, actively involving the community in every stage of the program. The results show a significant improvement in the farmer groups' understanding of agroforestry practices and sustainable forest management. Additionally, the institutional strengthening of the forest farmer groups positively impacted their ability to access government assistance programs and financial institutions.
Co-Authors Agustinus Kastanya Alexander Padatu Alvanolis Ivanno Passal Aryanto Boreel August E Pattiselanno B Latuamury Bokiraiya Latuamury Ch. C. V. Suhendy Daniel Pattipeilohy Debby V. Pattimahu Debby Vemiancy Pattimahu Elfrida Ratnawati Ferad Puturuhu Fransina Latumahina Fransina Latumahina Fransina Latumahina Fransina Latumahina Fransina Latumahina Haduaci, Doni Hatulesila, Jan W Hatulesila, Jan W. Hendrina Lelloltery Hukom, Zakaria Ibnu R Pattilouw Irwanto Irwanto Isak W Silooy Ivan Passal Jan W. Hatulesila Jhon Sahusilawane John M. Matinahoru Kailola, Jacob Kastanya, Agustinus Komul, Yulianus Kunu, Pieter Lutfia I. Litiloly Lydia Riekie Parera Marleen Annette Tuakora Marthina. Tjoa Merlin Renny Sitanala Mustamu, Sofia Nicolas E. Patoding Patti, Jogeneis Pattimahu, Debby Putuhena, Jusmy D Radios Simanjuntak Rehatta, Herman Rohny S. Maail Rohny Setiawan Maail Ronny Loppies Rosita M. Elly Rus'an Latuconsina Selanno, Frenly Marvi Sitanala, Merlin Renny Solly Aryza Talahaturuson, A. Tan, Lieke Th.M. Silaya Tjoa, Marthina Tuakora, Marleen Annette Woody A. Timisela Yosevita Theodora Latupapua