Dear candidate, Since you wish to opt for one of the best Institutions of India, you need to understand that M.Sc Agronomy is a two years full time Programme offered by IARI, the admission into this course is solely based on their entrance exam results. Now when it comes to the rank you need to secure, if you a general category student you need to have between first two three positions and if you are from any other category you have some grace. Work hard and make your chance,

https://www.careers360.com/university/indian-agricultural-research-institute-new-delhi/msc-agronomy-course

Good luck!!