Table 2 Selected properties of superphosphate and pig slurry applied to the soil columns, and different P fractions of total P in the slurry

Superphosphate

Water soluble P, % of total P

95

Pig slurry

Dry matter content^#, %

7.3

Total C, %

31

Total N, %

4.0

Total P, %

1.7

 P fractions of total P (%)

  NH₄Cl-P

49.5

  Bicarbonate/dithionite-P

0.5

  NaOH-P

0.7

  HCl-P

0.4

  NaOH org-P

1.1

  Rest-P

47.7