Table 4.

Relationships between heavy metals in milk, silage, water, and soil.

Samples	Cr	As	Cd	Pb
Milk-silage	0.626 **	0.326	0.676 **	0.194
Milk-water	0.041	0.637 **	0.119	0.046
Milk-soil	0.344	−0.112	0.557 *	0.327
Silage-water	0.076	0.556 *	0.444 *	0.424
Silage-soil	0.604 **	0.180	0.739 **	0.654 **
Water-soil	−0.045	0.113	0.237	0.341

Note: * p < 0.05, ** p < 0.01.