Innovation is a major challenge for economic development and social progress. Faced with the ecological and food problems that the world is currently experiencing, the legitimacy of innovation takes on its full meaning, particularly in developing countries. As emphasized by international organizations (UN, FAO), building skills and abilities in the agricultural and food sectors are necessary when launching innovation processes for the benefit of suffering populations. This book deals with different experiences launched in many developing countries in these sectors and shows how local initiatives can provide answers to the pessimism of experts and the media. Multidisciplinary analysis and practices explain how collective work creates value chains that can foster local and national economic development. The authors revisit the innovation agri-food models that contribute to economic development. Agri-Innovations and Development Challenges is composed of general presentations of innovations applied in developing countries, as well as specific studies on the joint valorization of knowledge and experience in agri-food engineering