How is corn field irrigation done?

Almost all 400 thousand hectares of agricultural land under corn cultivation in Iran is irrigated. Therefore, improving irrigation management can have a significant impact on the quantity and quality of water, which is known as the most important resource of the country. Correct management of irrigation in corn fields can bring factors such as economic production, saving water resources and maintaining or increasing water quality. For this purpose, it is necessary to use estimation of evaporation and transpiration of corn and accurate measurement of water in the soil profile to determine the time and amount of irrigation.