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All Journal Jurnal Ilmu Pertanian Indonesia Agrikultura Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Cannarium (Jurnal Ilmu-ilmu Pertanian) Journal of Degraded and Mining Lands Management Penelitian Pendidikan Geografi Agro Bali: Agricultural Journal Jurnal Agriment Jurnal Pertanian Khairun (JPK)
amiruddin teapon
Universitas Khairun
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Social Sciences

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Distribution and Number of Capilong (Calophyllum inophyllum) in Ternate Island of Indonesia Ishak, Lily; Teapon, Amiruddin; Ashwath, Nanjappa; Hindersah, Reginawanti; Sidayat, Mardiyani
Cannarium Vol 19, No 1 (2021)
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/cannarium.v19i1.3409

Abstract

Indonesia has a diverse of new and renewable energy sources including biofuels. Biofuels are promising eco-friendly energy sources generated from biological raw materials. Biofuels can also be derived from the seeds of  Capilong trees. However, the occurrence of Capilong trees in North Maluku has not been tapped to support a local economic income due to the lack of knowledge  of the local community. The present study was undertaken with the aim at investigating the distribution and number of Capilong trees across Ternate Island. A field investigation using a census method was held to collect data on the number and distribution of Capilong trees while observing the following parameters: stage of growth, topography, rock materials and landforms. The findings revealed that Capilong trees are mostly occurred in a tree group, while the seedling population number was low. Interestingly, Capilong trees have demonstrated a natural characteristic that are tolerance to various topography, rock materials and landforms condition. It is therefore recommended to cultivate the plant through a community development program and classify the plant as a potential species that can be used for land rehabilitation programs.
Assessing heavy metal contamination and soil fertility in degraded farmland adjacent to nickel mining: Pathway towards sustainable land management in Halmahera Region, Indonesia Ishak, Lily; Teapon, Amiruddin; Subur, Riyadi; Armaijn, Liasari; Sidayat, Mardiyani; Abdul Rachman, Idris; Ladjinga, Erwin
Journal of Degraded and Mining Lands Management Vol. 13 No. 3 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.133.10491

Abstract

A continuous decline in crop yields in the Halmahera region of Indonesia, has been attributed to potential soil contamination by heavy metals from mining activities. Yet, the extent to which such contamination directly drives farmland degradation in this region remains undercover. This study aims to quantify the concentration and spatial distribution of selected heavy metals, evaluate their ecological risks, assess soil fertility in the affected areas, and propose directions on future research for sustainable land management (SLM). Sixteen soil samples were collected and analyzed for physicochemical properties and concentrations of Fe, Ni, As, Cd, Co, and Hg. The results indicates that Fe exhibited the highest concentration (11,894 mg kg?¹), whereas Hg was negligible. Strong positive correlations and similar spatial distribution patterns were observed among Fe, Ni, and Co, which distincted from those of As and Cd. The pollution load index revealed moderate contamination for Fe and low contamination for other metals, while geoaccumulation index values ranged from low to moderate, reflecting contributions from both natural and anthropogenic sources. Ecological risk assessment indicated a low risk level. Additionally, soil fertility was considered low, characterized by reduced organic carbon, nitrogen, potassium, cation exchange capacity, and base saturation. Findings of this study provide a crucial foundation for future research to develop a conceptual framework for SLM that supports farmland restoration, improves soil health, increases crop yields and ecosystem services, and enhances the knowledge and economic benefits of local communities in this region.
Effect of Soil Amendment Application on Productivity of Watermelon (Citrullus vulgaris Schard.) in Suboptimal Land Tri Mulya Hartati; Krishna Aji; Amiruddin Teapon; Urai Suci Yulies Vitri Indrawati
Jurnal Ilmu Pertanian Indonesia Vol. 31 No. 1 (2026): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.31.1.158

Abstract

Inappropriate land management system has emerged as a serious issue in agricultural development. Instead of boosting land productivity, suboptimal land use has become a viable option for regional agricultural development. However, this has not resulted in considerable increases in agricultural productivity. The purpose of this study was to improve soil parameters and increase watermelon (Citrullus vulgaris Schard) production by applying soil amendments to suboptimal land. This study was conducted utilizing a factorial randomized group design with two factors. The first factor was the application of mulch (M) with three treatment levels: M0 = no mulch, M1 = reed mulch, and M2 = coconut leaf mulch; the second factor was the application of bird manure fertilizer (P) with three treatment levels: P0 = no fertilizer, P1 = 10 t/ha fertilizer, and P2 = 20 t/ha. The data was analyzed using ANOVA and Duncan's multiple range test (significant at P < 0.05). The study was conducted at Khairun University's Campus IV in Madihutu Village, Kao Teluk District, North Halmahera Regency. Soil parameters and plant agronomic traits were among the observed variables. The findings revealed that the mulch and bird manure treatments had no significant impact on soil characteristics. In terms of plant agronomic features, the mulch-free treatment had the greatest impact on watermelon plant growth and yield, whereas the 10 t/ha fertilizer treatment outperformed the other treatments. Keywords: bird manure fertilizer, mulch, suboptimal land, watermelon plant
Co-Authors Abdul Rachman, Idris Abdurrahman Hoda Aji, Krishna Ashwath, Nanjappa buhari umasugi Dahlia Aprilia Soraya Erwin Erwin HIMAWAN BAYU AJI Ishak, Lily Krishna Aji Ladjinga, Erwin Liasari Armaijn Mardiyani Sidayat NANJAPPA ASHWATH Nurmayulis Ramli Hadun Rasyid, Rusman Reginawanti Hindersah Riyadi Subur, Riyadi Sudjud, Suratman Tri Mulya Hartati Tri Mulya Hartati Urai Suci Yulies Vitri Indrawati Wati, Indah