Agronomy is a vital branch of agriculture that encompasses all its sub-disciplines. It is the very foundation of agriculture, and its knowledge is crucial at every level of intensity. This book is particularly useful for students preparing for competitive exams such as JRF, SRF, IARI entrance exam, civil services, ARS, and other university exams in agronomy. It is hoped that this book will provide immense benefits to users who wish to advance their careers in agronomy.