The volume of irrigation have effect on wet bulb which is important parameters in selection of emitter.The distance of outlets, the flow intensity and period of irrigation should be designed as though the volume of wetted soil close to the volume of root plant. Thus, the observation of form and volume of wetted soil under emitters in order to supplying the demand of plant water, optimistic management and increasing of irrigation efficiency is necessary. For knowing that, whether the referred emitter soaks the Favorable area or not, the concluded wet pattern is needed so that on basis of these...