Season

Sampling Date

A

B

C = A*B/1600

TN Concentration

Runoff

N Loss through runoff

mg/L

L

kg/ha

1980s wheat season

2012.11.23

24.7

141.9

2.2

2012.12.30

19.9

141.0

1.8

2013.02.26

24.3

138.6

2.1

sum

6.1

1980s rice season

2013/7/6

2.3

176.0

0.3

2013/7/21

3.8

125.0

0.3

2013/8/19

3.1

143.0

0.3

2013/8/29

2.9

162.0

0.3

sum

1.2

2000s wheat season

2012.11.23

27.0

141.9

2.4

2012.12.30

21.6

142.6

1.9

2013.02.26

50.5

142.6

4.5

sum

8.8

2000s rice season

2013/7/6

2.7

176.0

0.3

2013/7/21

4.2

166.0

0.4

2013/8/19

17.1

166.0

1.8

2013/8/29

7.5

168.0

0.8

sum

3.3