Phosphorus Sorption Characteristics of Luvisols and Nitisols in North Ethiopian Soils

Table 4

Path coefficient analysis for direct effect of soil properties (diagonal and underlined) and indirect effect of other soil variable (off diagonal) on the p sorption maximum (Xm) of the Langmuir isotherm.

	Clay	pH	Av. P	OC	Ex. Al	CEC	r	U	R^2
Clay	0.74	−0.57	0.49	−0.03	0.15	0.01	0.79	0.31	0.90
pH	−0.65	0.67	−0.49	0.03	−0.14	−0.01	−0.64
Av. P	−0.58	0.51	−0.63	0.03	−0.11	−0.09	−0.86
OC	−0.44	0.35	−0.42	0.05	−0.08	−0.11	−0.66
Ex. Al	0.72	−0.59	0.45	−0.03	0.16	0.01	0.72
CEC	0.04	−0.03	0.26	−0.03	0.00	0.22	0.47