CONTENT I. INTRODUCTION 1.1 Potato production scenario of India 3 1.2 Potato production scenario of Gujarat state 4 1.3 Impact of Climate Change on Agriculture 5 1.4 Impact of Climate Change on Potato 6 1.5 Dynamic Crop Growth Simulation Model 7 1.5.1 Introduction to DSSAT model 8 1.5.2 Calibration and Validation of Crop model 8 1.5.3 PRECIS model 9 1.6 Illustrative summary of climate change scenario 9 1.7 A2 scenario 10 1.8 Objective 10 1.9 Limitation of study 11 II. LITERATURE STUDY OF CLIMATE CHANGE IMPACT ON POTATO 2.1 Effect of temperature on crop growth 12 2.2 Impact of climate change on potato yield 15 2.3 Crop growth simulation modeling for potato 17 2.4 Climate change assessment and PRECIS model 20 2.5 Adaptive Agronomic measures for potato crop 22 III. MATHODLOGY FOR EVALUATION OF IMPACT 3.1 Calibration and validation of DSSAT model 26 3.1.1 Location 26 3.1.2 General weather and climatic conditions 28 3.1.3 Meteorological data 28 3.1.4 Crop and varietal characteristics 28 3.1.5 Soil data 28 3.2 Description of DSSAT model 29 3.2.1 Phenology 30 3.2.2 Leaf area development 30 3.3 Crop management for experiment 31 3.3.1 Culture operation for Crop observation experiment 31 3.4 Input data for DSSAT model management 32 3.4.1 SUBSTOR model Input and Output 32 3.5 Calibration of experimental potato cultivator in DSSAT model 36 3.6 Weather data preparation for climate change study 37 3.7 Climate change study 40 IV. CLIMATE CHANGE IMPACT ON EXPERIMENTAL POTATO YIELD 4.1 Climatic trend analysis of Anand district 41 4.2 DSSAT model calibration and validation results of experimental potato 42 4.2.1 Potato yield 43 4.2.2 Biomass yield of potato 44 4.2.3 Phenology LAI maximum 45 4.3 PRECIS generated weather condition during projected period 46 4.3.1 Temperature variation under A2 scenario 46 4.3.2 Rainfall variation under A2 scenario 47 4.3.3 CO2 variation under A2 scenario 48 4.4 Impact on potato yield and phonological changes under A2 scenario 49 4.4.1 Tuber yield 49 4.4.2 Biomass yield of potato 51 4.4.3 Maximum Leaf area index 52 4.5 Adaptation study 53 4.5.1 Adaptation by additional fertiliser application 53 4.5.2 Adaptation by organic manure 53 4.5.3 Adaptation through change in planting date 56 V. SYNTHESIS AND CONCLUSION 5.1 General 58 5.2 Objectives and methodology 58 5.3 Calibration of DSSAT model 59 5.4 Validation of DSSAT model 59 5.5 Summary of Weather condition during projected period 59 5.6 Conclusion 60 5.7 Future line of work 60 REFERENCES 61 Annexure & glossary