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Title: The Genesis and Classification of Soil on Serpentinite Bedrocks in the Toposequence of Bohusimale Mountain in Indonesia
Authors: M. Tufaila; Bambang Hendro Sunarminto; Dja’far Shiddieq; Abdul Syukur ; Muhidin
DOI:
Aff: Department of Agrotechnology, Faculty of Agriculture, Halu Oleo University, Kendari, Southeast Sulawesi, 93212, Indonesia. Tel: +624013192610; Fax: +624013191692
Author Email: m.tufailahemon@yahoo.co.id
Keywords: Soil Genesis; Soil Classification; Serpentinite; Toposequence
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Abstract:The topographical diversity of Bohusimale Mountain with its serpentinite bedrocks under the influence of tropical climate accounts for the differences of the process of soil formation and the characteristics of the formed soils. A research was conducted to study the genesis and classification of the soils on the serpentinite bedrocks. Observation was conducted on the summit, backslope, and footslope of the mountain. The physical, chemical, and mineral properties of the soil and rock samples were analyzed in the laboratory. Result of the research showed that the specific processes of the formation of the soils on the serpentinite bedrocks were desilication and ferrallization. The formed soil contained clay minerals dominated by goethite and magnetite, Fed (13.91-22.28%), Fet (17.80-25.81%) and a high ratio of Fed/Fet (0.75-0.91). The soils that had the highest level of development were the soils on the footslope, then on the summit, and on the backslope. The soils that were formed on the serpentinite bedrocks on the summit and the backslope were classified as Rhodic Kanhaplustalfs, whereas the soil on the footslope was classified as Petroferric Haplustox.