Phosphorus Sorption and Redistribution on Soil Solid Phase in a Brazilian Haplorthox Amended with Biosolids

Table 5

Average proportions of P fractions in soil samples amended with increasing amounts of biosolids.

P rate	CaCl2	NaHCO3		NaOH		HCl	Residual
		Po	Pi	Po	Pi
kg ha^−1	%
0	1.3	2.8	9.1	1.5	8.1	3.8	73.4
250	1.3	10.9	10.0	3.0	11.5	7.7	55.6
1000	1.3	6.6	12.9	5.2	16.7	5.3	52.1
2000	1.5	4.8	18.1	11.3	18.6	4.3	41.4