Crop water needs of winter wheat in seven growth stages in mm

Total

Stages

I

Sowing to tillering

II

Tillering to wintering

III

Wintering to Greening

IV

Greening to Jointing

V

Jointing to heading

VI

Heading to flowering

VII

Flowering to ripening

Planting

date

16 October

to 17 November

18 November to 19 December

20 December to 05 March

06 March to 28 March

29 March

to 23 April

24 April

to 16 May

17 May to 06 June

221 days

Region I

32.192

28.168

40.24

60.36

80.48

88.528

72.432

402.4 mm

Region II

38.408

33.607

48.01

72.015

96.02

105.622

86.418

480.1 mm