Hii!
For applying into the Assam agricultural College, you need to produce some essential documents such as school leaving certificate, migration certificate, marksheet of class 12th, id proof, etc., But the most important would be Eligibility certificate to be produced from the University, Assam Agricultural College is affiliated to. This is a process which the different state board students have to produce to get addmission into a different state board affiliated University or College.
Hope this helps.
Good luck!