Table 3.

The relationships between Po fractions and physiochemical features.

Fractions	MnO	Fe2O3	Al2O3	CaO	pH	OM	TN	TP	Po	Pi
Liable Po	0.759 **	0.713 **	0.658 **	0.671 **	0.743 **	0.600 **	0.578 **	0.756 **	0.723 **	0.696 **
Moderately labile Po	0.682 **	0.627 **	0.564 **	0.911 **	0.875 **	0.595 **	0.572 **	0.673 **	0.633 **	0.658 **
Nonlabile Po	0.759 **	0.933 **	0.864 **	0.575 **	0.662 **	0.689 **	0.680 **	0.934 **	0.930 **	0.511 **

** p < 0.01; n = 65.