The irrigation can be accomplished by different methods: surface, subsurface, sprinkler and drip . With any of these means, it is necessary to select an irrigation system, before the design, the equipment specification and installation can proceed. In order to make a suitable selection of the system, one should carefully consider the capacities and limitations of all the potential alternatives. Tables 4.1 and 4.2 indicate the aspects that must be considered in the selection of an irrigation system. These aspects are listed as follows :
1.The crop and related factors: Type, root depth, water consumption, development of diseases.