TABLE 5.

Correlation coefficients^d for several parameters of the test soils and some characteristics of the AMF spore populations

Variable	Total no. of AMF spores	Spore density
		Glomus sp. III	Glomus sp. V
pH	0.939**	NS	−0.942**
Ptotala	−0.971**	NS	0.910*
Pavailableb	−0.959**	NS	0.886*
NO3-N	NS	NS	−0.970**
Zntotala	−0.978***	−0.931**	NS
Zn2+c	−0.957***	−0.884*	0.890*
Cdtotala	−0.905*	−0.951**	NS
Cd2+c	−0.922**	−0.894*	NS
Nitotala	−0.897*	−0.971**	NS
Pbtotala	NS	−0.941**	NS
Cutotala	−0.944**	−0.952**	NS

^aExtracted with aqua regia. 

^bExtracted with NH₄NO₃. 

^cFree in soil solution (29). 

^d∗, significant at P ≤ 0.05; ∗∗, significant at P ≤ 0.01; ∗∗∗, significant at P ≤ 0.001; NS, not significant.