Hello Harshit,
Indian Council of Agricultural Research (ICAR) conducts it's entrance exam AIEEA annually for admission into UG and PG programmes.
Tentatively  ICAR 2018 online application form window will be open from -3rd week of April.
The candidate must check official website (www.icar.org or www.icarexam.net) for latest news and updates.
   
Some preparation tips for ICAR =
It's an all India level exam comprising of 180 questions to be solved in 150 minutes (for UG) So, Make your study schedule and make sure that you have allotted the equal time for all subjects. It plays a very important role in preparing for any exam so, speed and accuracy is a must.
Questions are from Physics, Chemistry, Biology, Maths and Agriculture, of which one has to attend any three. As questions are more and time is less, focus on basics and a set of standard questions from any good book.
Most of the questions related to physics, Chemistry  and biology comes from 11 and 12th NCERT books . SO read NCERT book from the core.
Revision and practising the subjects is an important part of preparation. The more you practice more will be your chances of cracking the exam. So, do practice which you have studied on a regular basis. Revision is the best way to remember the things which you have already studied
Every year cut off is generally high so attending more number of questions and that too correctly is really important.
Above points definitely help you
Regards
Dr Parmanand Agarwal
MBBS MD
Career counsellors