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 |