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Table 1 Monthly mean temperature and precipitation during cotton growing seasons

From: Introduction of Bacillus thuringiensis (Bt) gene does not reduce potassium use efficiency of Bt transgenic cotton (Gossypium hirsutum L.)

Month

Mean temperature /℃

Precipitation /mm

2010

2011

Perennial average

2010

2011

Perennial average

April

11.2

15.2

14.2

17.5

15.3

21.2

May

21.7

21.3

19.9

29.5

21.8

34.2

June

24.7

26.4

24.4

88.7

117.4

78.1

July

28.6

27.5

26.2

34.0

265.7

185.2

August

26.5

26.4

24.8

177.8

171.3

159.7

September

21.3

20.2

20.0

80.8

64.0

45.5

October

13.6

14.2

13.1

59.0

28.7

21.8

  1. The data were provided by Meteorological Bureau of Haidian District, Beijing