Weather data collected from the agromet observatory located at Regional Agricultural research station, Kasargod was used for markov chain analysis to mark the weekly wet and dry spell distribution in the region during the climatic conditions El Nino and La Nina. Weather cock software and manual calculation was done to arrive at the results. Both initial and conditional probability was found out for annual, SW Monsoon and NE Monsoon weeks based on the methodology. The length of growing period

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... also calculated based on this for three climatic situations based on the method suggested by FAO, El nino conditions possess better LGP (31 weeks) as compared with Lanina and neutral years. K e y w o r d s El Niño conditions, Fitting crop production