This book "Nitrogen Transformation in Vertisol under soybean- wheat system" is need for a good book on soil science for undergraduate student as well as post graduate student of agriculture in India. The motivating thought in bringing out this publication was that while dealing with changes in organic and inorganic forms of nitrogen in Vertisol due to conjoint use of inorganic fertilizer and organic manures and their relation with yield and total nitrogen uptake by soybean and wheat, Nitrogen fixation by soybean crop. It is written in a simple and lucid style. I am deeply appreciates the honorary efforts of all the contributors. It also thanks Dr KS Raddy (IISS, Bhopal), Dr UK Vaishya (J.N.K.V.V, Jabalpur) and the Lambert academic publishing for providing publishing in this book. I sincerely hope that teachers and students of Soil Science in agricultural universities and institutes would find this textbook useful in learning and teaching different aspects of Indian soils and their management. I would appreciate receiving comments and suggestions, if any, on any aspect of this publication; these would immensely help in improving the future editions of this book.