Fig. 5. Relationship of metal contents and total P contents in HCl fractions of animal manure. The four manure samples were dairy cattle manure (DC1), swine manure (SW1), and poultry litter (PL1 and PL3) (Fig. 3) with the increasing order of P contents (m mol kg^–1 dry soil). Horizontal bars represent standard deviations of P contents. Vertical bars represent standard deviations of metal contents.