This book has been designed to cover the course of graduate and Post-graduate levels of various Indian Agricultural and general Universities. It also covers the syllabus of Agricultural Research Services Examination and National Eligibility Test conducted by the Indian Council of Agricultural Research, New Delhi. This book also helpful to the scientists and academicians those who are engage in agricultural research systems. This book also helpful to the students, teachers, researchers and other academicians those who are related to the agricultural research systems in India during covid-19 pandemic era.