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All Journal Jurnal Penelitian Saintek Agrikultura IJOG : Indonesian Journal on Geoscience Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Soil REns Jurnal Agro Wiralodra Jurnal Tanah dan Iklim Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Pertanian Agros
Rina Devnita
Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Languange, Linguistic, Communication & Media Public Health

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Investigation of Lithologic Discontinuities Phenomenon in Andisols derived from Mt. Patuha Devnita, Rina; Arifin, Mahfud; Sandrawati, Apong
Soilrens Vol 22, No 1 (2024)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v22i1.57238

Abstract

Lithologic discontinuity reflects the distinct change between different types of soil layers that can occur due to various geological process, resulted in variation composition, colour, texture, organic matter, consistency, structure, and others characteristics. Soils derived from volcanic eruption have the possibility to have lithologic discontinuity in the depth of the soil profiles due to the different eruption that formed the soils. Soils developed from the eruption of Mt. Patuha were investigated whether lithologic discontinuity presence the soil layers. The research used descriptive and comparative method of two profiles, analysed the soil macro-morphology and soil laboratory analyses covered colour, organic carbon, texture, consistency and structure. The result showed that the unusual pattern distributed of colour, organic matter, consistency, structure indicated the lithologic discontinuities of the underlying 2Ab (A buried) horizon to the overlying horizon. The darker colour, higher organic matter content, friable consistency in 2Ab in deeper depth, were some indications of lithologic discontinuities, where in soil without lithologic discontinuities the deeper depth or horizon was normally lighter colour, lower organic matter content and firmer consistency. However, detailed analysed with instruments like XRF and VIS DRS are needed to have the precise elemental composition in every horizon which conclude the horizon from the same or different parent materials.
Land Suitability and Economic Feasibility Analysis of Peanuts (Arachis hypogaea) in Jatinangor Subdistrict, West Java Province Devnita, Rina; Solihin, Muhammad Amir; Sandrawati, Apong; Sitorus, Hasnan Pratama
Soilrens Vol 22, No 2 (2024)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v22i2.61720

Abstract

Jatinangor Subdistrict in West Java Province has potentiality to be grown by peanuts (Arachishypogaea) due to the proper climate and the quite spacious availabity land. The farmers in this areaare also used to grow this legume and the demand for this commodity increases by years. The objectiveof this study was to evaluate actual land suitability classes and economic feasibility of peanuts inJatinangor Subdistrict. The methodology using survey method following by sampling and laboratoryanalyses to evaluate land suitability. The assessment used matching table considering the limitingfactor for evaluating land suitability. The economic feasibility using R/C ratio (Revenue Cost Ratio).The results showed that the actual land suitability class for peanuts class S3 (Marginal Suitable) withthe limiting factors of water availability, organic carbon content and slope. Non suitable also foundwith limiting factors of coarse material and slope. The R/C ratio for peanuts was 1.52, indicating thatpeanuts were feasible and profitable to cultivate in Jatinangor Subdistrict.
Karakteristik Tanah Andisol Pasca Konversi Lahan Hutan Menjadi Semak Anindita, Sastrika; Sandrawati, Apong; Arifin, Mahfud; Devnita, Rina
Soilrens Vol 22, No 2 (2024)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v22i2.61737

Abstract

Land use conversion can affect characteristics of soil and also soil quality. The present study evaluate theimpact of land use conversion from pine forest to bush in tropical volcanic soils in Indonesia. We comparedtwo soil profiles from the same areas (uphill slope of Mt. Tangkuban Perahu) and analysed theirmorphological, physical, and chemical soil properties. Our study showed that there was a decrease in soilorganic carbon stock about 3.7% (382 ton C ha-1) after approximately 8-15 years of land conversion. Other physical and chemical soil properties, such as soil texture, bulk density, pH, exchangeable base and acidity,cation exchange capacity, and base saturation were relatively similar. This research provide insight intohow change in vegetation cover can affect carbon and nutrient dynamics as well as become a baseline tounderstand soil recovery potential if the land is restored to forest or bush in volcanic soils.
Evaluating Soil Particle Analysis Methods for Tropical Andosols in Indonesia Anindita, Sastrika; Sandrawati, Apong; Arifin, Mahfud; Devnita, Rina
Soilrens Vol 22, No 2 (2024)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v22i2.61718

Abstract

Choosing the right method to quantify soil particles (sand, silt, clay) is essential to predict and managesoil characteristics in relation to e.g. nutrient or water retention. However, separating silt and clayparticles for volcanic soils is difficult. In this study, we investigated the effect of three different soilparticle analysis methods, namely the regular pipette method, Na-resin dispersion, andultrasonication with high energy level (1500 J ml-1) on the distribution of soil particle size in tropical volcanic soils. Ultrasonication with high energy level was founded to be the best method to fullyseparate silt and clay fraction compared to Na-resin and regular pipette method. In conversion, thedispersion of soil particles using regular pipette method was suboptimal. In the ultrasonicationmethod, a step that is important to achieve full dispersion is pH buffer > 8 in soil suspension. Thisultrasonication method was founded to have good correlation with Na-resin dispersion method (R =0.88). This study suggested that conventional particle size analysis may not fully separate sand, silt,and clay particles correctly in soils rich in amorphous materials and oxides, and we proposedultrasonication high energy level with pH buffer > 8 method as an alternative method.
RESPONS KETERSEDIAAN KALIUM, SERAPAN K DAN HASIL JAGUNG MANIS TERHADAP APLIKASI DOSIS PUPUK NK MAJEMUK PADA INCEPTISOLS Endah Nurlaela; Rina Devnita; Yuliati Machfud
Jurnal Pertanian Agros Vol 27 No 1 (2025): EDISI JANUARI
Publisher : Fakultas Pertanian Universitas Janabadra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37159/jpa.v27i1.37

Abstract

Fertilization is an agrotechnical method to improve soil fertility, which is crucial in increasing sweet corn production in Indonesia. Nutrient limitations in the soil often contribute to low corn yields. Inorganic fertilizers, such as compound NK fertilizers can provide essential nutrients for sweet corn. This study aims to identify the effects of different doses of compound NK fertilizers on available potassium (K), potassium uptake, and sweet corn yield. The research was conducted from October 2019 to January 2020 at the Experimental Farm and Soil Chemistry and Plant Nutrition Laboratory, Department of Soil Science and Land Resources, Faculty of Agriculture, Padjadjaran University, Jatinangor. The experimental method used was a Randomized Block Design (RBD) with 10 treatments and 3 replications. The treatments included 1 control (no fertilizer), 1 treatment with single N, P, K fertilizers, 5 treatments with various combinations of compound NK fertilizers (14.25:19.25) and single P fertilizer, 1 treatment with a single dose of compound NK fertilizer (14.25:19.25), and 2 treatments with various combinations of compound NK fertilizers (14.25:19.25) and single N, P, K fertilizers. The results showed that the combination of compound NK fertilizer (14.25:19.25) at 350 kg ha-1 with single P fertilizer at 50 kg ha-1 produced the best results, with available potassium at 2.13 cmol kg-1, potassium uptake at 42.37 mg plant-1, and cob weight with husk at 0.33 kg plant-1 on inceptisols in Jatinangor.
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 Ade Setiawan Ai Ening Rostini Anindita, Sastrika Anni Yuniarti Apong Sandrawati Benny Joy Cucu Suherman Endah Nurlaela Fajri Syahid Nurhakim Ganjar Herdiansyah Henly Yulina Henly Yulina Henly Yulina Henly Yulina Henly Yulina, Henly Mahfud Arifin Marenda Ishak Sonjaya Sule Muhammad Amir Solihin Oviyanti Mulyani Pujawati Suryatmana Putri, Noviani Rachmat Harryanto Rachmat Heryanto Ramadhan, Ilmi Ridha Hudaya Rija Sudirja Sandrawati, Apong Santi Rosniawaty Sitorus, Hasnan Pratama Solihin, Muhammad Amir Teddy Marpaung Widara Almaghfirah Ismail Yanuar Euro Andrian Yuliati Machfud