Phosphorus retention in calcareous soils and the effect of organic matter on its mobility

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	P_cb	P_d	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]

ISSN: 1467-4866