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Correlation analysis of Olsen-P and P fractions on the 50th and 120th days of incubation of flooded and upland soils mixed with different manures. PM, pig manure; CM, chicken manure; DM, dairy manure; and OM, commercial organic compost. A-P = Available P = Resin-P + NaHCO3-Pi; M-Pi = Moderately Inorganic P = NaOH-Pi + HCl-P; Po = Organic-P = NaOH-Po + NaHCO3-Po; and O-P = Occluded-P = Residual-P.
