JEQ -- Guérin et al. 36 (4): 975 Figure IG1

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Fig. 1. The r² values for relationships between the [P/(Al+ ${gamma}$ Fe)]_M-III ratio as an index of P saturation (IPS_M-III) and the degree of P saturation (DPS_OX) ( ${alpha}$ _m = 0.4) or water-extractable P (P_W) by varying the ${gamma}$ coefficient in IPS_M-III.