Food Security and Crop Yield is a book that discusses about the global perspective of the food security. This book aims to discuss about the increasing yield and improving resource use efficiency, sustainability of crop production in relation with food security and global perspective about the changing climate and food security. Description regarding the food security risk assessment, genetically modified crops, plant breeding and crop management and sustainable development have been highlighted in this book. This book provides insights to the readers about the role of innovations in meeting food security challenges and the future of food demand worldwide including why food security is needed in the upcoming years.