Sorption and Environmental Risks of Phosphorus in Subtropical Forest Soils

Figure 2

Distribution of extractable P in the bulk soils of O/A and AB horizons of red soil (RS) and limestone soil (LS). Different lowercase letters indicate significant differences () among the P fractions from the same horizon of the same soil; different uppercase letters indicate significant differences () of the same P fractions between the same horizon of the red soil and limestone soil. Error bars are standard error ().