The embargo effectively covers agricultural products because it bans any private institutions from funding agricultural trade. Since the great majority of trade

The embargo effectively covers agricultural products because it bans any private institutions from funding agricultural trade. Since the great majority of trade happens with the aid of import/export banks that essentially curtails any agricultural trade. See this US congressional report that explains it pretty well: https://fas.org/sgp/crs/row/R46791.pdf https://fas.org/sgp/crs/row/R46791.pdf