Can a BSc agriculture graduate do an MBA in any desired field or specialization and from a top university like IIM, FMS (Delhi), etc.? Is he/she preferred over a BTech graduate?

In most top B-schools, there are no specializations offered in their degrees, and the courses are common for all students in the first year. Hence, the undergraduate specialization of the student will not have much impact on the courses that they can do in the B-school.

However, some IIMs give different scores at the time of final selection based on the undergraduate degree. B.Tech graduates are generally given the least value, and other degrees like BSc Agriculture might get a special advantage. But this can vary across different B-schools, and you need to check the scoring system that is released by each IIM during the selection process.

In terms of placements, there aren't many companies related to agriculture that offer roles in top B-schools, so a BSc Agriculture graduate might not have any added advantage. There might be a disadvantage in roles like Information Systems or Operations roles that might prefer students with a technology background. However, in general, the degree of the student wouldn't impact the rest of the placements.