International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage



(2660) Soil classification systems
System of classification of soils based on recognition of the type and predominance of the constituents of soil considering grain size, gradation, plasticity and compressibility. Amongst the widely used soil classification systems are Unified Soil Classification System, USDA system and AASHO system of USA. Other countries also have their systems.

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