Nitrogen Management has emerged as a very significant field of plant biology in the recent years due to its increasing importance in plant agriculture, human health and sustainable environment. Being a potent force in the cellular metabolism, the reactive nitrogen possesses the ability to improve and damage the quality of life for all the earth's inhabitants The Nanjing Declaration on Nitrogen Management has recently made a global call urging for the development of a comprehensive approach to optimize nitrogen management in food and energy production with minimum environmental impacts. The nitrogen as a key constitute in the commercial fertilizers, has been instrumental to the "Green Revolution" which is considered as a major breakthrough to sustain several hundred million people throughout the world from hunger and poverty. The excessive use of the fertilizers has resulted many ecological and environmental problems and health hazards to the human and many animals. Amongst the welcome steps and the current strategies , the International Nitrogen Initiative is one of the most important global effort intended to optimize nitrogen use for its beneficial effects, keeping an alert eye on its negative impacts on human health and the environment. The present book can be seen as a timely input to the International Nitrogen Initiative to Provide new advances and updates in the various fields of nitrogen plant relations in terms of plant productivity and environmental concerns. The contents of the book have been carefully organized in the planned sequence to give a detailed insight of the subject to the beginners as well as to the experts. The chapters critically evaluate the current knowledge, state of art and future prospects of nitrogen nutrition in plant productivity for improving nutrient use efficacy of plants. The book is valuable for the scientists, academicians, researchers, students, planners and industrialists working in the areas of biotechnology, plant agriculture, agronomy, horticulture, plant physiology, molecular biology , nutritional biology and plant sciences
