It's difficult to say definitively whether a cutoff score of 156 with sports quota guarantees admission to a BSc Agriculture program without more information. The eligibility and cutoff scores vary greatly depending on the specific university, the program, and the year. Some universities, like Banaras Hindu University, have specific requirements for sports quota admissions, including performance in fitness and playing ability tests. Other universities might have a different system for allocating sports quota seats, and the cutoff score might be lower than the general merit-based cutoff.