Quantifying local crop response to irrigation is important for establishing proper irrigation management approaches.To apply that,  a field experiment was carried out   to  evaluate the effect of three available  soil moisture depletion(ASMD) levels, 25 %, 50 %, and 75% applied using solid set sprinkler irrigation system in combination with  four concentrations (0.00%, 0.05%, 0.1% and 0.2 %)of poly vinyl alcohol  soil conditioner. The combined effect of water regimes and different concentrations of soil conditioner was studied on faba bean (Vicia faba cvGiza 843), The experiment was carried out in the semiarid climate of northeast Farm of El-Ismailia Agricultural Research Station, El-Ismailia Governorate Egypt during two successive seasons(2012/2013 and 2013/2014).Evapotranspiration (ET_a), yield productivity of faba bean, water use efficiency and macronutrients uptake were also evaluated. Results showed that the actual seasonal crop evapotranspiration (ET_a) for ASMD treatments varied between (1605.36 –2482.45m³ fed^-1.) in the first season (2012/2013) and (1439.26 – 2457.01m³ fed^-1.) in the second season (2013/2014). There are three options to calculate seasonal ET_c for faba bean crop in Ismailia condition. So, it can be use FAO-24RD, PMd or Droogers and Allen (2002)methods. Moreover,obtained data reveal that application of polyvinyl alcohol(PVA)synthetic soil conditioners (with high concentration), decreased available soil moisture depletion (ASMD) in sandy soil and caused a significant increase in faba bean yield, water use efficiency (WUE) and improved the macronutrient uptake by faba bean yield. Finally, the results clearly showed that the significant effect of PVA at (0.1or 0.2 %) concentration was most observed at 50% ASMD.