Liquidity index
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7-4-250
The index that relates the plasticity of a soil to its natural moisture content.
Liquidity index = (natural moisture content - plastic limit) / plasticity index
Note: The complement to unity of the liquidity index is called in French indice de consistance, and in German Konsistenzzahl.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)