Indicative values of average crop water needs in mm (adjusted )by FAO

fresh vegetables, melons, strawberries - open field (500 mm); cereals (excl. maize and rice) (550 mm); maize (grain and green) (650 mm); rice (1500 mm); pulses (300 mm); potatoes (600 mm); sugar beet (650 mm); rape and turnip rape (500 mm); sunflower (500 mm); textile crops (400 mm); temporary and permanent grass (500 mm); other crops on arable land (500 mm); fruit and berry plantations (450 mm); citrus plantations (1000 mm); olive plantations (700 mm); vineyards (700 mm)