Fig. 2. Relationships between DPS-1 (double acid–extractable P/oxalate-extractable Fe and Al) and DPS-2 (double acid–extractable P/double acid–extractable Fe and Al) for soils of the A and Bh horizon of Spodosols.
Fig. 2. Relationships between DPS-1 (double acid–extractable P/oxalate-extractable Fe and Al) and DPS-2 (double acid–extractable P/double acid–extractable Fe and Al) for soils of the A and Bh horizon of Spodosols.