Table 7 Ammonium (\({\text{NH}}_{4}^{ + }\)) concentrations in soil after transplanting with different tillages (T), nitrogen fertilizations (N), and years (Y)

7.12^a (0.15)

7.23^a (0.16)

7.17^A (0.10)

17.24^b (0.23)

20.51^a (0.11)

18.87^A (0.71)

12.18^b (1.92)

13.87^a (2.51)

13.02^B (1.54)

8.27^a (1.04)

7.58^a (0.15)

7.92^A (0.50)

18.00^b (0.27)

21.19^a (0.75)

19.60^A (0.71)

13.13^a (1.90)

14.39^a (2.60)

13.76^A (1.56)

7.69^a (0.53)

7.41^a (0.12)

17.62^b (0.22)

20.85^a (0.37)

12.66^b (1.31)

14.13^a (1.56)

7.55^b (0.27)

19.23^a (0.47)