Characterization of clay mineralogical composition and consistency of Hanoi agricultural soils – comparison with Japanese agricultural soils

Abstract

    Five agricultural soil samples from Hanoi, Vietnam were subject to clay mineralogical analysis and determination of the soil plasticity in addition to measurement of pH, organic matter content, cation exchange capacity (CEC) and exchangeable cations and particle size distribution. The pH, CEC and exchangeable cation of soil samples were similarly. In contrast, organic matter content and clay particle were comparable between the soils samples. The predominant clay minerals in soil samples were mica and kaolinite. In addition, to compare the plastic number, six Japanese agricultural soil samples were picked up. Resulting from lower of clay fraction content, organic mater content, CEC, Exchangeable cations, all of Hanoi agricultural soils samples have smaller liquid limit, plastic limit, plastic index and activity than those of Japanese agricultural soils.