Evaluation of Efficiency of Border Irrigation System in Some Farms of Miyandoab Zarinh rood Plain

This research was carried out on three farms in the development unit of four irrigation and drainage network Zarinh rood. Farms were selected randomly in three different positions and irrigated with end blocked border irrigation system and crop pattern was Alfalfa. In two fields, three consecutive irrigation and in the other field two consecutive irrigation of end season was evaluated in Shahrivar (Sep) and Mehr (Oct) of year 1391. Also three test borders in each field were randomly selected and evaluated. Physical and chemical properties of field’s soil, soil moisture condition, inlet discharge to the test borders, and also advance and recession data were measured in the day before irrigation, day of irrigation and 48 hours after each irrigation. The results shows that, application efficiency in fields A and B, respectively, were 88.61 and 95.07 percent and requirement efficiency were 90.21 and 92.82 percent in adequacy of irrigation 59.59 and 65.87 percent. Application efficiency in field C were 51.59 percent and requirement efficiency were 100 percent in adequacy of irrigation 100 percent. The efficiencies obtained acceptable and condition of farm irrigation in the evaluated period is desirable, although was carried out deficit irrigation in the fields A and B but water requirement efficiency of them was acceptable. Also the results of this research showed if the custodians of irrigation networks have well of scientific and operational programs to water delivery and disteibution to farmers and water available to farmers were to the extent required, farmers often able to apply appropriate management are in the within their field.