Table 3. Direct effects (diagonal, italics) and indirect effects (off diagonal) of soil properties and soil REE on pulp REE.

	Rsoil a	pH	OC	CEC	clay	Feox	r	R 2	U
LREEpulp
LREEsoil	0.36 ***	0.10	0.00	0.08	0.00	0.14	0.68**	0.60	0.63
pH	−0.18	−0.19 **	0.01	−0.08	0.00	−0.09	−0.54**
OC	0.01	−0.02	0.06	−0.02	0.02	0.02	0.08
CEC	−0.12	−0.06	0.00	−0.24 ***	0.02	−0.01	−0.41**
clay	0.00	0.00	0.02	−0.07	0.06	0.07	0.08
Feox	0.21	0.07	0.01	0.01	0.02	0.24 **	0.57**
HREEpulp
HREEsoil	0.45 ***	0.06	0.01	0.07	0.00	0.05	0.65**	0.54	0.68
pH	−0.17	−0.17 *	0.00	−0.07	0.00	−0.06	−0.48**
OC	−0.09	−0.02	−0.04	−0.02	0.00	0.02	−0.14
CEC	−0.14	−0.06	0.00	−0.22 **	0.00	−0.01	−0.43**
clay	−0.14	0.00	−0.01	−0.06	0.00	0.04	−0.17
Feox	0.15	0.06	0.00	0.01	0.00	0.17 *	0.38**
REEpulp
REEsoil	0.34 ***	0.10	0.00	0.09	0.00	0.14	0.67**	0.61	0.63
pH	−0.17	−0.21 **	0.00	−0.08	0.00	−0.09	−0.55**
OC	0.00	−0.02	0.05	−0.02	0.01	0.02	0.04
CEC	−0.12	−0.07	0.00	−0.26 ***	0.01	−0.01	−0.44**
clay	−0.02	0.00	0.02	−0.07	0.05	0.07	0.03
Feox	0.20	0.08	0.00	0.01	0.01	0.25 **	0.56**

^a Represents LREE_soil, HREE_soil or REE_soil

* Significant at P<0.05

** Significant at P<0.01

*** Significant at P<0.001.