Preliminary study of weathering crust for changing plantation

Abstract

In Vietnam, weathering crust has been intensively studied from different aspects. However, this paper is the first attempt to study on changing plantation. The following methods are used: analysis of weathering factors in natural balance; geochemical method for studying the major and trace elements; comparing weathering crust with the standard one on which a known assemblage of plants is well developed. The results reveal that: the feralite weathering crust is suitable for litchi, longan and some others; the magalite weathering crust on the karst field is suitable for tea, coffee, sugar‐cane, etc.; the saprolite weathering crust is suitable for bamboo group; The ferosialite weathering crust, depending on the bedrock, is suitable for many different tree groups; The sialite weathering crust is suitable for Cinnamon, Illicium Verum. These study results may be supplemented to achieve a sound orientation in changing plantation.