Table 2.

Quantities of P Extracted from Calcareous Marsh Soil*

Types of P in soil (mg/kg)							P by sequential fractionation (mg/kg)
Total	Inorganic	Organic	Residual	Olsen	Pcb	Pd	NaOH	CB	CC	CA	CBD	NaOAc	HCl
839	611	122	105	26	111	145	6	127	389	82	37	13	60

Pcb = CB extr; Pcbd = CBD extr.; ca = citrate-ascorbate; CB = citrate-bicarbonate; CBD = citrate-bicarbonate-dithionite; CC = citrate (2extr).

*adapted from ref. [46]