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Fig. 4. Scatter-plot comparison of predicted and measured, relative gas diffusivities in 21 differently textured soils from Europe (first column), 17 Latosols and Yellow soils (Brazil and Japan) (second column), and 22 Andisols and Gray-lowland soils from Japan (third column). Model predictions are (top to bottom): (a–c) the Millington and Quirk (1961) model (MQ [1961]), Eq. [4], (d–f) the Millington and Quirk (1960) model (MQ [160]), Eq. [3], (g–i) the Buckingham–Burdine–Campbell (BBC) model, Eq. [5], (j–l) the macroporosity (
100) based Eq. [6], and (m–o) the three-porosity model (TPM) gas diffusivity model, Eq. [12] and [14]. RMSE, root mean square error; AIC, Akaike's information criterion.
