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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat
Ramadhan, Ilmi
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Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Public Health

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Sosialisasi Rekomendasi Pemupukan dan Pembuatan Nematisida Nabati dalam Meningkatkan Produktivitas Tanaman Kopi di Desa Campakamulya Arifin, Mahfud; Solihin, Muhammad Amir; Devnita, Rina; Rosniawaty, Santi; Putri, Noviani; Ramadhan, Ilmi
Dharmakarya Vol 13, No 1 (2024): Maret, 2024
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/dharmakarya.v13i1.46125

Abstract

Kopi Arabika Puntang menjadi salah satu produk unggulan pertanian di Desa Campakamulya, Kabupaten Bandung, Jawa Barat. Cita rasa dan aroma yang khas menjadikan kopi ini banyak peminat, namun produktivitas kopi arabika ini terus menurun. Pengabdian pada masyarakat (PPM) ini berupaya mendongkrak produksi kopi Arabika Puntang di Lembaga Masyarakat Desa Hutan (LMDH) Bukit Amanah di Desa Campakamulya, Kabupaten Bandung, Jawa Barat. Produktivitas kopi yang rendah di wilayah ini disebabkan oleh kondisi fisik lingkungan dan tanah yang kurang baik. Selain itu, setidaknya terdapat 17 spesies nematoda parasit yang berbeda ditemukan di tanah perkebunan kopi dengan tegakkan hutan pinus, yang dapat menyebabkan pertumbuhan terhambat, pematangan buah tidak merata, dan hasil panen rendah. Untuk mengatasi masalah tersebut, PPM ini mengusulkan beberapa solusi yaitu perbaikan kesuburan tanah melalui pemupukan berimbang, pengendalian hama dan penyakit, dan praktik konservasi tanah. Seminar dan lokakarya dengan tema "Peningkatan Produktivitas Lahan Perkebunan Kopi Berbasis Karakteristik Tanah dan Lingkungan" juga menjadi bagian dari program PPM ini. Penerapan metode ini diharapkan mampu meningkatkan produksi kopi Arabika Puntang dan membantu memenuhi permintaan dunia akan kopi berkualitas tinggi ini. Petani juga mendapat manfaat dari program ini, karena meningkatkan pemahaman mereka tentang tingkat kesuburan tanah dan cara menjaga kesuburan tanah.
Flow dynamics of unsteady pyroclastic density currents (PDC) from Sunda ignimbrite, West Java, Indonesia Ramadhan, Ilmi; Angkasa, Syahreza Saidina; Nugroho, Rio Priandri
Bulletin of Scientific Contribution Vol 19, No 2 (2021): Bulletins of Scientific Contribution : Geology
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v19i2.35272

Abstract

Sunda Volcano is the one of several volcanoes in Indonesia which produced ignimbrite deposit from caldera forming eruption. Depending on the volume and considerable thickness of the deposits, Sunda ignimbrite might has been deposited with a variety of flow mechanisms. Heterogeneous deposition mechanism will heavily controlled by numerous parameters such as velocity, rheology, types of flow-boundary zone, or pre-existing topographic influence. According to the deposition parameters, Pleistocene Sunda ignimbrite transportation and deposition mechanisms are still unclear. Here we show detailed observations of each facies and the Unconformity Bounded Stratigraphic Units (UBSU) approach to determine the flow sub-units and flow mechanism of the Sunda ignimbrite. Overall, we found that Sunda ignimbrite consists of five different facies. Forestepping stacking pattern from Sunda ignimbrites also observed from stratigraphic correlation indicates that energy instability occurred during transport and deposition in the PDC. Waxing energy of PDC which occured is caused by the development of granular-flow and fluid-escape dominated flow-boundary zone at the base and body of emplaced PDC. Our results demonstrate how Sunda ignimbrite emplacement mechanism can be affects by pre-existing topography which developed during the effusive eruption of Sunda Volcano. Furthermore, we also found that Sunda ignimbrite deposition has been changed the topography into the gentler relief due to this forestepping pattern of each ignimbrite units. The study of Sunda ignimbrite facies can reveal suitable hazard mitigation and also use to characterize heterogenity in groundwater aquifers and geothermal reservoirs. Moreover, detailed facies analysis and UBSU could give us informations on how explosive eruption at 0.205 M.a take places on the southern flank of Sunda Volcano.
Advanced Satellite-Based Spectral Techniques for Identifying and Quantifying Soil Clay Minerals Devnita, Rina; Arifin, Mahfud; Ramadhan, Ilmi
Indonesian Journal on Geoscience Vol. 12 No. 2 (2025)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.12.2.301-318

Abstract

Soil mineral plays an important role in agriculture due to its ability in influencing soil physical and chemical characteristics, and therefore is important to be identified. The techniques for identifying soil minerals, such as the utilization of a polarization microscope and X-Ray Diffraction (XRD), are often laborious, time-consuming, and costly. This study aims to identify and to quantify soil clay minerals by using Hyperion EO-1 imagery and XRD methods, and to reveal the effectiveness of using satellite imagery to determine soil minerals. Spectral signatures from Hyperion EO-1 were extracted in alignment with the soil sampling coordinate locations, and spectral data processing methods such as Continuum Removal (CR), and Savitzky-Golay filtering were used to identify and to quantify minerals. The results show that hyperspectral analysis revealed distinct spectral absorption features, and it could identify kaolinite, chlorite, goethite, hematite, and plagioclase. Meanwhile, XRD analysis confirmed kaolinite and chlorite, consistent with the hyperspectral observations. A key advantage of the spectral absorption technique for raw soil was its ability to identify not only clay minerals, but also both primary and secondary minerals, such as plagioclase, hematite, and goethite, that remain unidentified when using the XRD method with iron removal pre-treatment. Although hyperspectral imagery was successful in identifying soil minerals, there are still some limitations that require further refinement, especially while conducting quantification. The findings underscored the potential of satellite-based hyperspectral analysis as a rapid alternative approach to soil mineral identification that can reduce reliance on laboratory-based methods.
Co-Authors Angkasa, Syahreza Saidina Mahfud Arifin Nugroho, Rio Priandri Putri, Noviani Rina Devnita Santi Rosniawaty Solihin, Muhammad Amir