This book represents physiological, biochemical, morphological, growth and yield traits in responses to abiotic stress. The purpose of this book is to provide a text book for stress physiology as will cover the both soil and abiotic environments. This book also provides a reference source for students and research scholars in stress physiology. I hope that the information contained in this book will be a valuable resource that can be used when scholars are interpreting the significance of their research. The co-authors of this text is Prof. Yogesh Kumar Sharma who is the plant physiologist. He guided many Ph. D students and completed several research projects in the field of plant physiology and agriculture and published many research papers in esteemed journals. His valuable suggestion and cooperation are very helpful in writing this book. The major theme of this book is an evaluation of various mechanisms used by the plants to cope with environmental stresses.