Table 4 Water and ammonium extractable nutrient concentrations of soils treated with different urea fertilizer (mg/kg).

Ca

H₂O

20.22 ± 3.64 a

28.56 ± 6.43 a

17.30 ± 15.70 a

8.69 ± 2.73 a

5.02 ± 3.78 a

4.53 ± 1.73 a

NH₄OAC

158.0 ± 4.8 a

160.5 ± 13.5 a

156.5 ± 4.5 a

648.3 ± 79.3 a

601.5 ± 34.7 a

620.6 ± 182.5 a

K

H₂O

10.24 ± 1.14 a

9.97 ± 2.44 ab

5.19 ± 4.34 b

44.28 ± 30.02 a

33.66 ± 12.82 a

20.35 ± 17.30 a

NH₄OAC

17.77 ± 1.45 a

14.45 ± 1.63 b

13.26 ± 0.53 b

326.7 ± 186.2 a

319.6 ± 117.3 a

221.9 ± 112.8 a

Mg

H₂O

3.03 ± 0.65 a

4.74 ± 1.75 a

2.40 ± 2.17 a

5.37 ± 2.25 a

2.99 ± 2.19 a

2.29 ± 1.13 a

NH₄OAC

14.07 ± 0.41 a

14.55 ± 1.24 a

14.16 ± 0.66 a

227.0 ± 14.4 a

213.6 ± 16.1 a

173.5 ± 22.0 b

P

H₂O

2.28 ± 0.14 a

2.12 ± 0.25 a

1.03 ± 0.86 b

0.65 ± 0.60 a

0.33 ± 0.07 a

0.24 ± 0.05 a

S

H₂O

12.07 ± 1.39 a

14.51 ± 2.55 a

11.19 ± 9.23 a

10.72 ± 4.89 a

9.09 ± 3.35 a

8.57 ± 3.33 a

NH₄⁺-N

KCl

12.71 ± 0.51 a

12.54 ± 0.51 a

14.52 ± 3.13 a

3.71 ± 1.88 a

1.45 ± 0.81 a

2.38 ± 0.49 a

pH

7.42 ± 0.12 a

7.15 ± 0.11 b

7.04 ± 0.07 b

6.25 ± 0.78 a

5.66 ± 0.40 a

5.28 ± 0.03 a

EC (µS/cm)

53.55 ± 7.56 b

79.94 ± 10.27 a

84.27 ± 11.74 a

63.51 ± 0.78 a

52.97 ± 0.40 a

29.93 ± 0.03 b