Bidhan Chandra Krishi Viswavidyalaya

Domicile Certificate is valid for a lifetime and hence doesn't prompt the need for renewal.

If you prepare for teaching is mandatory to do B. Ed but are going through Ph.D. you must complete a master's degree first.

Yes you can get BCKV for B.Sc. (Hons.) Agriculture. BCKV is offering B.Sc (Hons.) Agriculture in full-time mode. 10+2 with Physics, Chemistry, Biology and English with minimum 50% marks (40% for the reserved categories) is the minimum eligibility criteria for admission. B.Sc admission is offered on the basis of marks in 10+2.
Additional 20 seats in B.Sc (Agriculture/ Horticulture) courses are offered on the basis of marks obtained in All India Entrance Examination conducted by ICAR (ICAR AIEEA).