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Fig. 1. Plot of laboratory TRIME measurements of Laurent et al. (2005) (yellow squares and red diamonds), Regalado et al. (2006) (blue squares) and Stacheder (1996) (triangles). Comparison of the different empirical models considered here: Eq. [1] (gray solid line) fitted to the data set obtained by Regalado et al. with a P2 two-rod probe operated in liquids and dry and water-saturated glass beads, Eq. [2] fitted to TRIME measurement taken with a tube probe operated inside a plastic access tube placed in a 10-L sample of natural soil dried from saturation, and Eq. [4] of Regalado et al. (dotted line) having the same mathematical form as Eq. [2] but fitted to all of the measurements by Regalado et al. (2006).
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