To increase yield, water must be provided in particular during the end of vegetation, flowering and seed formation periods.
Thanks to the deep root system, 2 to 4 water applications are generally enough when the plant is grown on medium depth texture soil.
Pre-irrigation is also sometimes necessary. The requirements must be specified at the end of the vegetation period, on flowering. When the water supply is limited, water may be saved during the maturing period.
The experience of Ukraine or Hungary demonstrates effective use of reel machines during germination.