Fig. 2 shows the soil water contents measured by Neutron probe before and after irrigation drawn by SURFER 8 software. These readings indicate that plastic mulching has a pronounced effect on drip irrigation effectiveness through the good estimation of wetting bulb's dimensions under the dripper and understanding its moisture changes in place and time, whereas the use of drip irrigation with plastic mulch reduced both of evaporation from soil surface and water distribution area in soil away from the lines of irrigation, which has extreme effect on irrigation water distribution pattern, root distribution, efficiency of the fertilizers, water use and ultimately on the cucumber production quantity and quality, These results are also in agreement with those of ICARDA (2000) and Pawar et al. (2002).