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Fig. 3. Cumulative P fractions extracted in various amendments. BEEF, manure collected from beef cattle barn; BIO1 and BIO2, biosolids samples; DAIRY, manure from dairy cattle barn; HOG-NUR, hog manure collected from a nursery barn; HOG-SOW, hog manure collected from a sow barn; OLD-HOG, hog manure collected from an agitated storage lagoon.