Climate change, resulted from the rise in global temperature, drives many stressors which make it difficult to predict the outcome in a general way. However, impact of climate change is so far more visible in agriculture than other sectors. Rise in temperature causes oxidation of soil organic carbon and affect biogeochemical processes and mechanisms, which make soil health and productive potential of soils weaker. It also affects weather at local regional and global scale, and hydrological cycle as well, which result in drought, flood, cyclones etc. Simultaneously it impinges directly upon reproductive biology of crops by reducing pollen viability and making spikelets sterile, which result in crop yield reduction. In India, impact of climate change on agriculture is predicted to occur more in northern parts, where wheat production may suffer losses of 4-5 million tons for each degree rise in temperature. Rice, pearl millet, soybean are other crops in that line. Globally, it has been predicted to have a huge burden in future as the world needs to feed nine billion population by the turn of the 21st century. Several techniques like conservation agriculture, integrated farming, crop diversification and carbon sequestration through agroforestry advocated helping climate change mitigation and adaptation have been discussed in detail in this book. Therefore, this book serves as a repository of information on climate change, mitigation and adaptation in relation to agroforestry, which can be useful to planner, researchers and undergraduate and post graduate students pursuing studies in the field of agricultural and allied sciences.

Natural change in climate is slow and takes millions of years; and it is known to have made our planet hospitable to live. The climate change is not limited to one country or a continent. It is occurring across the globe as evident from droughts in Texas and flooding along the Missouri River in the United States and along the Red River in Canada. Climate change drives many stressors and interacts with many non-climatic stressors which make it difficult to forecast outcomes in any general way other than existing threats to agriculture. Agroforestry increases a high level of diversity within agricultural lands which supports numerous ecological and production services that bring resilience to the impact of climate change mitigation and adaptation. Climate change risk management is difficult in annual cropping systems due to increasing uncertainty of inter-annual variability in rainfall and temperature. Mixing of woody trees with crops, forage and livestock operations provides greater resilience to the inter-annual variability through crop diversification and increased resource use efficiency. Deep rooted trees allow better access to nutrients and water during droughts and when appropriately integrated into annual cropping systems and extract from different resource pools that would otherwise be lost from systems. Agroforestry increases soil porosity, reduces runoff and increases soil cover, which improve water infiltration and reduces moisture stress in low rainfall years. During periods of excessive soil moisture, tree based systems keep soils aerated by pumping out excess water and offer an economic return. The book contains 36 chapters mainly on agroforestry practices found in India and its role in climate change mitigation and adaptation.