Modeling Deficit Irrigation Water Requirement For Maize in Mosul Region

AbstractA computerized model with (Microsoft QuickBasic version 1.1) was proposedfor simulating the effect of deficit irrigation for maize crop during spring and autumnseasons in Mosul region. The simulation is based on 16 years of climatological datafor the period ( 1985-2000 ) for Mosul meteorological station , which includes dailymaximum and minimum temperatures , maximum and minimum relative humidity ,wind speed at 2m height , and sunshine hours , which is used to calculate dailyreference evapotranspiration with Penman-Monteith equation .The model predictsyield reduction by changing irrigation depth for three different irrigation methods(sprinkler , furrow and drip) .The rainfall is divided into three classes which representthree regions (wet ,semi- arid and arid )