A field trial was set up to evaluate the effects of different irrigation levels (I1: rainfed and no irrigation, I2: 2 times supplementary irrigation at head development and seed setting stages, I3: 3 times irrigation at stalking, heading, and seed filling stages, I4: full irrigation) and the use of various types of farmyard manure (M0: no manure application, M1: cow manure, M2: sheep manure, M4: poultry manure) on growth, yield, and oil content of sunflower seeds. The largest heads were produced using poultry and sheep manure under full irrigation and I3 conditions. The highest lateral canopy growth was achieved with the use of I4+M4. The highest percentage of oil was obtained under conditions I4 and I3, using M1, M4 and M2, respectively. Reducing the frequency of irrigation to three times, along with the use of farmyard manure, resulted in acceptable economic performance while reducing water consumption.
