Fig. 1. Relationships between water-soluble P and 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 horizons of Spodosols.
Fig. 1. Relationships between water-soluble P and 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 horizons of Spodosols.