Abstract
Climate is the main factor that influences any agricultural operation starting from field preparation to harvesting. Agriculture which relays on them Climate condition contributes to 10 percent of gross Domestic product and provides employment for about two percent of the rural work force in Tamil Nadu Temperature, humanity, rainfall, wind atmospheric pressure. Precipitation and other Metrological condition decide the climate condition of a particular place. Since,the past few years the cropping pattern is experiencing a change due to the weather prevailing in the area. The effects of Climate change have been found to have implications for dry land and irrigate
crop yield as well as irrigation water use (Reserving and Iglesi as 1994) Except rain fall, all other climate factors are uniform and little influence on crop field. The drastic changes in the rainfall pattern of Tamil Nadu affect the significant area under cultivation.
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