This book covers all aspect of legume production management technologies, plant ecological response, nutrients management, biological nitrogen fixation, molecular approaches, potential cultivars, biodiversity management under climate change. Also covered are various aspects of legume management under climate change such as, production management technology, ecology & adaptation, diseases, and international trade; physiology and crops response to nutrients, drought, salinity, and water use efficiency; Biodiversity management, molecular approaches and biological Nitrogen fixation; climate change and strategies. This book presents the most comprehensive and up to date review of research on different cool season grain legume crops, nutrients management, biotic and abiotic stresses management, agronomical approaches for drought management, salinity, drought, weed management and water use efficiency, impact on international trade around the world.