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The relationship between particle‐size distribution by laser granulometry and image analysis by transmission electron microscopy in a soil clay fraction

The aim of this study was to validate the use of laser granulometry in studies concerning fractions < 2 µm in soils. The study was carried out on the clay fraction of a loamy soil from northeast Thailand. Granulometry by light scattering requires the determination of the refractive indexes of the solid phases. Once these values have been established, laser granulometry can provide a detailed description of the particle‐size distribution within the clay fractions. Laser granulometry showed a multimodal distribution in the clay fraction of this soil.