Parameter

Unpolluted Garden Soil (Control)

Oil Mill Polluted Soil (Sample)

Nitrogen (g/kg)

1.34

2.21

Total organic carbon

11.4

23.4

Sodium (Cmol/kg)

0.49

1.35

Magnesium (Cmol/kg)

1.72

11.04

Available phosphorus (mg/kg)

16.20

24.15

pH in water

6.5

7.7

Water holding capacity (%)

12.2

42.4

Colour

Dark-brown

Blackish