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Thirty years (2071-2100) projected climatic data under A2 scenario along with thirty years (1961-1990) actual observed data suitably adjusted to the baseline period were used for climate change impact study on maize cultivars (GM-3 and GS-2) in Dahod district of middle Gujarat. For purpose of evaluating different adaptation options, different realistic hypothetical set of crop management data such as additional irrigation, fertilizer and organic manure were used using InfoCrop model. It was found that two supplementary irrigations given at tasseling and silking stages increased 18 per cent yield over rainfed maize when it was sown during first July for cv. GS-2. The application of additional dose of chemical fertilizer (50 per cent extra) and organic manure + chemical fertilizer (50 per cent) at knee height and tesseling stages gave 10 and 8 per cent higher yield, respectively.

The sensitivity analysis of three T. aesivum (GW 322, GW 496 and GW 366) and one T. durum (GW 1139) cultivar of wheat was performed to see the possible change in the grain yield of wheat due to changed sunshine hours (BSS), maximum and minimum temperatures using WOFOST model. The potential condition was assumed with congenial weather and adequate management practices. The results showed that the increase in sunshine hours was found to increase the yield in all cultivars and vice versa. The rise in maximum and minimum temperatures had adverse effect on wheat yield. The increase in the maximum temperature by 5°C may cause reduction in yield by 24 to 29%. The effect of the minimum temperature was also of the similar order, but the varietal differences were observed. Among the cultivars, GW 496 was found to be most sensitive to maximum temperature and less to bright sunshine hours. Among the different stages, flowering to dough stage was found to be most sensitive stage.