Hello Nikhil
Following is a list of the Top 20 colleges in Jharkhand for B.Sc Agriculture :-

• Sai Nath University, [SNU] Ranchi

Ranchi, Jharkhand

• Jharkhand Rai University, [JRU] Ranchi

Ranchi, Jharkhand

• AISECT University, Hazaribagh

Hazaribagh, Jharkhand

• Birsa Agricultural University, [BAU] 

Ranchi, Jharkhand

Duration of the course is four years, comprising eight semesters.
Good Luck!