Agricultural Engineering

To pursue B.Tech in agriculture, you should clear the Agriculture Entrance Exam like ICAR AIEEA and other state Entrance Exams like JCECE BCECE KCET KEAM etc. And various private Institutions also have their Entrance exam for Agriculture such as LPU-NEST BVP CET SAAT etc. After clearing the desired Entrance exam you will be able to take admissions in some of the best Institutions of our country.

Passed or appeared in 10+2 Science/equivalent with P.C.M. 45% marks in aggregate (Minimum requirement of 40% marks is applicable to reserve category candidate)
Course fee: 5 lakhs.
The JEE cut-off varies each year. You should obtain at least 75 or above.
Good luck.

IET, Lucknow is a premium institute for engineering. It provides B.Tech in many branches but not in agriculture. For B.Tech agriculture you must look out for other colleges.

Generally, the cut off for B.Sc Agriculture is high. You can check the cut off for Agriculture of this year on their official website. Just wait for the counselling, maybe, you can get a seat in the second or third session of counselling.

Anna University is one of the best universities in India. With the level of discipline in the campus, it stands head to head with other great Universities in India. The placement there is pretty good, but for the branch you queried is not so popular, so you'll be getting less opportunities than other branches.

Yes, you can take admission, but with this score, you may not get a good college. So, choose the best in what you can get. You can do agricultural engineering.
Good luck.