Generally, 6 irrigation are needed to get good yield of wheat. It should be done in the following stages -
First irrigation should be done after 20-25 days of sowing at crown root initiation stage, second irrigation should be done after 40-45 days of sowing at tillering stage, third irrigation after 60-65 days of sowing at jointing stage,
fourth irrigation after 80-85 days of sowing at flowering stage, fifth irrigation after 100-105 days of sowing at milking stage & last irrigation after 115-120 days of sowing at dough stage.
If water is available for one irrigation only then it should be given at crown root initiation stage and if available for two irrgation, it should be given at crown root initiation stage & flowering stage.