Fig. 1. Enzymatically hydrolyzable organic P in sequential extracts of swine manure. Different letters in the same panel indicate significant difference at P 0.05. From left to right: organic P released by phytase from wheat (WP), acid phosphatase (Type I from wheat germ, i.e., GP), acid phosphatase (Type IV-S from potato, i.e., PP), WP/GP, WP/PP, GP/PP, WP/GP/PP, and WP/GP/PP/nuclease P1 from Penicillium citrinum (NP).