Kajian Kuantitatif Pelapukan Geokimia Tanah Berbahan Induk Tuff Dasit di Kecamatan Juhar Kabupaten Karo
Sidabutar, Fenry Wanvo
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Process of geochemical weathering represent process fall to pieces climate with formed of soil as end result, Parent materials is one of the notching materials coming from rock material representing especial condition is form of soil by its many factor. To know how this process happened can knowed by conducting research to structured soil profile to the some horizon. This research aim to to study quantitatively decay of geochemical weathering of soil that rest on Tuff Dasit at Countryside of Juhar sub-province of Kara. Method of research consist of soil survey and soil laboratory analysis. Research of field include cover gathering of datas exist in field which consist of soil colour, soil structure, soil consistency, and deepness of solum. Research in laboratory conducted to obtain total analysis data of mineralogy composition, and bulk density. Sequences of soil horizons are O- A- Bwr Bw2- C- R. R and C horizon dominated by SiQ2,and other element dominant both normally Na20 in R and of CaO in C horizon. Laboratory analysis of soil showed that decreasing of Si02. Al203, MgO, CaO, Na20, Fe203 and P205! but increasing of potashium and mangan, however for some accurate compound, K20 and Mn203 change or experience of increasing of composition from R to C horizon.
- SP - Soil Science