ICAR (Indian council of agriculture research) conducats exam for entrance into various UG and PG courses.

The UG courses offered are:

Bsc (hons) Agriculture

Bsc (hons) Forestry

Bsc (hons) Horticulture

Bfsc

Bsc(hons) community science

Bsc (hons) sericulture

Btech Agriculture Engineering

Btech Food Technology

Btech dairy Technology

Btech Biotechnology

So yes, you can get B.tech agriculture engineering with ICAR exam in tamil nadu also. All the best.

Hope this helps. Thank you.