Interaction Effects of Nitrogen Source and Irrigation Regime on Tuber Quality, Yield, and Water Use Efficiency of L.

Two field experiments were conducted to investigate the effects of three drip irrigation regimes (G: 120% crop evapotranspiration (ETc), G: 100% ETc, and G: 80% ETc) and four nitrogen (N) source treatments (S: non-fertilized; S: urea, S: ammonium nitrate, and S: ammonium sulfate on water consumption use, water utilization efficiency, chlorophyll, yield and tubers quality of potato ( L.; cv Diamond) under a drip irrigation system during two successive winter seasons (2015/16 and 2016/17)). Nitrogen fertilization was applied at 380 kg ha as standard application for potato in the investigated area.