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Three years (2014-15 to 2016-17) experimental data collected at Main Vegetable Research Station, Anand was used to calibrate and validate the SUBSTOR- potato model for three cultivars of potato (K. Badshah, K. Lokhar and K. Pokhraj). The validated model was used to simulate the tuber yield by changing the maximum and minimum temperature (+30 to -30C)in different months (November, December, January and February). Results revealed that the elevated temperature had negative effect on tuber yield and reduced temperature had positive effect on tuber yield. Among the varieties, K. Lokhar was least affected by the temperature variation. K. Pokhraj was found to be most sensitive to elevated temperature, while K. Badshah was most beneficial in reduced temperature. Temperature variation during December and January was found to have maximum effect on normal sown potato crop. The effect of minimum temperature on tuber yield was more than that observed with maximum temperature.

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The present investigation was carried out to study the impact of climate change on summer groundnut in middle Gujarat using calibrated CROPGRO-peanut model by changing maximum and minimum temperatures by -2 to +30C and increasing concentration of CO2 upto 550 ppm. Results revealed that with increase in maximum temperature by 3 0C, the pod yield was decreased by 39 to 48 per cent in different cultivars. The effect of minimum temperature on pod yield was less as compared to maximum temperature. The simulated pod yield increased upto 41 per cent with elevated CO2 concentration of 550 ppm. However, if the maximum temperature was increased alongwith increase in CO2 concentration the pod yield could be compensated upto 2 0C with CO2 of 500 ppm, but further increasing of the maximum temperature and carbon dioxide caused decrease in the pod yield.

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