Determining Optimum Irrigation Depth for Wheat and Tomato Crops Using Aquacrop Model (A case study in Mashhad)

Nowadays, using necessary tools is essential in order to help irrigation systems for best management of irrigation water in different parts of agriculture. As a result, by developing Aquacrop model, FAO organization has made these essential tools available. Currently, few actions are practicable for sanitizing and reserving water in farms and other areas outside of them. Determining optimum depth of irrigation for the crop and moreuniform and effective application of water are some of other practicable actions that could be applied inside the farms. The objectives of this study are to determine optimum depth of irrigation and economic analysis of it for wheat and tomato crops in Khorasan Razavi (Mashhad) farms using Aquacrop model in Eastern Iran. By estimating four levels of irrigation water (Wm, Ww, Wel, Wl), this study showed that in order to calculate maximum depth of irrigation for maximum yield of wheat and Tomato crops, decreased water usage by 30 and 10 percent, respectively. The production function curves for these crops have indicated 57 and 20 percent increase of yield for Wheat and Tomato, respectively. Economic analysis of results revealed that the profit resulted from this increase in yield was 51.01 million Rials for wheat and 117.80 million Rials for tomato.