Today, competition has become a part of life for everyone, whether its professional, business or academic. To reach vital positions in our system, one needs to clear certain competitive examinations held regularly. This book is one small effort to help the aspirants to succeed in this particular discipline of 'Agriculture' in the exams such as National Eligibility Test (NET), State Level Eligibility Test (SLET), Junior Research Fellowship (JRF) (Examination), Union Public Service Commission (UPSC) (Test) and many others like these. This book has been divided into parts and chapters on topical basis, in a very logical manner. Special attention has been allotted to prepare an exhaustive question bank for the Objective Part (Paper-II) and enriched essay and write ups for the Descriptive Part (Paper-III) of the examination. The unnecessary heap of questions and answers has intentionally been avoided to deliver the chosen and the best to the readers. Hopefully, this manual would serve as a vital reference tool for the candidates appearing for various National Level and State Level competitions and therefore should help them make it in the concerned discipline with ease.