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Fig. 6. Relative substrate (broken line) and gas (solid and dash line) diffusivity simulated by selected models. The plots at the upper part show the results if assuming equal importance of solute and gas diffusivity (
= ß = 1). The plots at the lower part show the results if is calculated with a fixed ß = 1 and using the observed optima for soil water content. Data points are mean values of measured relative gas diffusivity for each water potential including all fifteen replicate cores. Bars represent standard error. The values at the data points indicate the numeric matric potentials.
