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All Journal Cannarium (Jurnal Ilmu-ilmu Pertanian) Techno: Jurnal Penelitian Journal of Degraded and Mining Lands Management Jurnal Dinamika Pengabdian (JDP) PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Inovasi Penelitian MAKILA: Jurnal Penelitian Kehutanan JAPI: Jurnal Akses Pengabdian Indonesia Acta Solum Jurnal Pertanian Khairun (JPK) Jurnal Penelitian Pendidikan Geografi
Ladjinga, Erwin
Agriculture Faculty, Khairun University, Ternate, North Maluku, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Nursing Public Health Social Sciences Other

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A Kajian Morfologi dan Sifat Fisika Tanah Pada Lahan Pasca Tambang Galian C Muhammad Asril H. Pajula; Adnan Sofyan; Erwin Ladjinga; Asrul Dedy Ali Hasan
Jurnal Penelitian Pendidikan Geografi Vol 9 No 3 (2024)
Publisher : Jurusan Pendidikan Geografi FKIP Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jppg.v9i3.303

Abstract

Kalumata is one of the sub-districts in the City of Ternate which is also the place where excavation C mining activities take place with the type of mining of minerals in the form of volcanic sand when referring to the geological formations from the geological map. Activity results in changes not only in land conversion but also in the condition of the physical properties of the soil. This study aims to determine the morphology and physical properties of the soil in post-mining excavation C in the Kalumata Village. The results of the research on the morphological characteristics of the three soil profiles in the post-mining area C have uniqueness and similarities. While the physical characteristics of the soil on the three soil profiles in the post-mining area C showed that the soil texture was dominated by the dust fraction, the bulk density tended to be low, the particle density was below the average for mineral soil particle density, high dominant porosity, and the lowest soil water content in the profile. III and the highest in profile I, as well as the fractionation of sand grains in each soil layer from profiles I II, and III, the proportion of sand is almost 100% dominating.
Geomorpho-Pedological Characteristics and Physicochemical Properties Under Different Agricultural Practices in the Fluvio-Marine Landscape, East Halmahera, Indonesia Krishna Aji; Erwin Ladjinga; Endah Widianti; Tri Mulya Hartati; Gunawan Hartono; Tiara Sarastika; Djoko Mulyanto
Acta Solum Vol. 4 No. 2 (2026): March 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i2.3578

Abstract

The phenomenon of environmental degradation threatens various sectors, including agriculture in coastal ecosystems, thereby weakening the land’s carrying capacity. On the other hand, information about soil resources in fluvial-marine landscapes has formed a complex, unique system that influences geomorpho-pedological characteristics. This study aims to (1) investigate variations in soil morphological characteristics under different agricultural practices and (2) interpret the results of soil genesis processes within the framework of geomorpho-pedological evolution in fluvio-marine landscapes. The research was conducted in Tobo Ino Village, Wasile Subdistrict, Subaim, East Halmahera Regency, North Maluku Province, Indonesia. The methodology used was a stratified sampling method to identify soil profiles based on USDA standards for two different land-use practices. This was followed by laboratory-scale physicochemical analysis of the soil in accordance with the Agricultural Instrument Standardization Agency, Ministry of Agriculture, Indonesia. The results show that land use activities affect soil morphology and classification. Fluvaquentic Endoaquepts soil classification is found in rice paddy field practices, while Typic Eutrudepts is found in mixed plantations. Along with similar geomorphological conditions but different soil evolution processes, this results in different land resource management practices. This approach offers a process-based understanding that is essential for sustainable agricultural planning in dynamic coastal-alluvial landscapes in wet tropical regions to achieve the Sustainable Development Goals (SDGs) and the Eight Goals of the Unitary State of the Republic of Indonesia.
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.
Jejak Pedogenesis Awal pada Inceptisol Berkembang Material Vulkanik Pulau Makian Maluku Utara Erwin Ladjinga; Lily Ishak; Sarif Robo; Gunawan Hartono; Iswandi Kadir
MAKILA Vol 20 No 2 (2026): Makila: Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v20i2.25376

Abstract

Volcanic island soils provide a strategic setting for examining how early pedogenic signatures emerge before diagnostic horizons are fully expressed. This study evaluates the relationship between chemical development and morphological differentiation in Inceptisols developed from volcanic parent materials on Makian Island, North Maluku, Indonesia. Two representative profiles were selected within relatively homogeneous volcanic land units but different topographic positions. Morphological properties were described using standard soil survey procedures, while texture, bulk density, porosity, infiltration rate, C-organic, C/N ratio, and cation exchange capacity (CEC) were analyzed by horizon. Linear regression and principal component analysis were applied as exploratory tools to assess intervariable patterns. The results show weak horizon differentiation (A-B-C), limited structural development, coarse texture, moderate bulk density (1.25-1.40 g cm⁻³), high porosity (47-51%), and moderate to rapid infiltration (20-40 mm h⁻¹), indicating strong parent-material control over physical properties. Chemical properties showed clearer vertical gradients, with higher C-organic content (up to 2.44%) and CEC (up to 21.95 cmol(+) kg⁻¹) in surface horizons. C-organic and CEC had moderate linear relationships in Profile I (R² = 0.56) and Profile II (R² = 0.55), whereas other relationships were weak or inconsistent. These findings indicate pedogenic decoupling, where chemical functions develop earlier than clear morphological differentiation. The study strengthens the concept that early pedogenesis in humid tropical volcanic islands may proceed through asynchronous organo-mineral and biological processes.
Co-Authors Abdul Rachman, Idris Adnan Sofyan Adnan Sofyan Aji, Krishna amiruddin teapon Asrul Dedy Ali Hasan Betty Kadi Lahati Djoko Mulyanto Endah Widianti Fataha, Farid Gunawan Hartono Gunawan Hartono Gunawan Hartono Idris Abd Rachman Ishak, Lily Iswandi Kadir Lahati, Betty Kadir Laksono Trisnantoro Liasari Armaijn Mardiyani Sidayat Muhammad Asril H. Pajula Mustaan, Sukmawati Nurul Ainun Tangge Riyadi Subur, Riyadi Sarastika, Tiara Sarif Robo Sarif Robo Tangge, Nurul Ainun Tri Mulya Hartati