Parameter

CS/SD Ratios

1:0

3:1

1:1

1:3

pH

7.62 ± 0.23

7.74 ± 0.25

7.84 ± 0.13

7.33 ± 0.29

% Organic carbon

8.36 ± 2.10

18.8 ± 1.18

21.1 ± 1.18

23.5 ± 1.26

Texture

Sandy loam

Sandy loam

Sandy loam

Sandy loam

Nitrate (mg/kg)

84.3 ± 8.36

217 ± 6.84

233 ± 5.85

314 ± 5.88

Phosphate (mg/kg)

6.13 ± 0.94

17.3 ± 0.73

19.6 ± 1.10

24.9 ± 1.18

Potassium (mg/kg)

12.4 ± 2.10

189 ± 1.43

222 ± 1.25

310 ± 1.64

Hydrocarbon utilizing bacteria count (CFU/g)

2.0 × 10³

2.0 × 10³

2.0 × 10³

2.0 × 10³

Total PAHs (∑µg/g)

817 ± 7.83

520 ± 4.97

464 ± 5.65

459 ± 4.33