Effect of PRD irrigation method and potassium fertilizer application on corn yield and water use efficiency

TREATMENTS: IRRIGATION: FI (full irrigation) variable partial root zoon drying (PRD-V) fixed partial root zoon drying (PRD-F) K FERTILIER 0 kg ha-1 150 kg ha-1 300 kg ha-1 1. the full irrigation resulted in significantly higher grain yields than both PRD treatments. 2. the highest WUE and IWUE were obtained in PRD-V and 300 kg potassium/ha. 3. the lowest WUE and IWUE were obtained in FI and 0 kg potassium/ha. 4. Full irrigation and PRD-Fix produced the lowest and the highest ABA concentration at any potassium level