Table 1 Soil characteristics in the experiments.

From: Morphophysiological mechanism of rice yield increase in response to optimized nitrogen management

Year

pH

Organic matter (g kg−1)

Total N (g kg−1)

Total P (g kg−1)

Total K (g kg−1)

Alkali-hydrolyzale N (mg kg−1)

Available P (mg kg−1)

Available K (mg kg−1)

2014

7.26

29.17

1.58

0.38

3.91

116.51

13.02

65.04

2015

5.80

29.58

1.28

0.50

7.75

97.64

20.27

56.52

2016

5.70

30.74

1.27

0.54

8.85

100.75

26.39

28.97