Table 9.

Corresponding between pools name and Hedley fractions in (model = GPASOIL-v0) and (model = GPASOIL-v1).

Pools name used in (model = GPASOIL-v0)	Pools definition used in (model = GPASOIL-v0)	Hedley fractions considered on sites used in Ringeval et al.11	Pools name used in (model = GPASOIL-v1)	Pools definition used in (model = GPASOIL-v1) (following He et al.14)	Corresponding with Hedley fraction used in He et al.14
PILAB	Labile inorganic P	[H2O Pi/Resin Pi+] Bicarbonate Pi	Pi-solu	Inorganic P in soil solution	H2O Pi/Resin Pi + Bicarbonate Pi
			Pi-lab	Labile inorganic P
PSEC	Inorganic P bound on secondary minerals	Hydroxide Pi [+Sonic Pi]	Pi-sec	Moderately inorganic P	Hydroxide Pi
POLAB	Labile organic P	[H2O Po + Resin Po+] Bicarbonate Po	Po-lab	Labile organic P	Bicarbonate Po
POSTA	Stable organic P	Hydroxide Po [+Sonic Po + HCl Po]	Po-sta	Moderately organic P	Hydroxide Po
PAPA	Apatite	HCl Pi (HCl diluated or not)	Pi-prim	Primary inorganic P	HCl Pi (HCl diluated only)
POCC	Occluded inorganic P	Residual P [+Hot HCl]	Px-occ	Occluded P (inorganic + organic)	Residual P [+Hot HCl P + Sonic P]

Squared brackets in columns 3 and 6 are used for Hedley fractions which are not systematically quantified. Columns 2 and 3 were adapted from the Table 2 of Yang and Post⁷⁹. Please, note that all occluded P was considered as inorganic P in Ringeval et al.¹¹ while this was not stated in Yang and Post⁷⁹.