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In the experiences organized at Suatu, Cluj, it was proved that for achieving high levels of poduction for the corn crop, it is absolutely necessary to mentain a good water supply duringthe whole vegetation period.Irrigation is a technological measure which influence the level, consistency and quality of the crop. By setting and by applying a rational irrigation regime is known for its supply of water under the soil, plant requirements. The study development of thermal regime and pluviometric regime evolution in the ecological conditions of the plain area of Transylvania, showed an increase in moisture deficit together with heat above the average multi-annual values. (Botzan M., 1972; Grumeza N. si colab.,1989;Rieul L., 1992; Nagy Z., E. Luca, 1994; Luca E., 1994, 1997; Luca E., Z. Nagy, 1999; Luca E., V. Budiu, Ana Ciotlăus, 2008). The main objective of the authors, is as high level production of grain. Increasingly, however, this priority is dependent upon the elements of technology, which in turn are constantly improving.