Often cross-pollinated crops have . . . . . . . . % of cross-pollination.

Often cross-pollinated crops have > 5% of cross-pollination.
Cross-pollination often exceeds 5 percent and may reach 30 percent. Such species are generally known as often cross-pollinated species. Cross-pollination, also called allogamy occurs when pollen is delivered to a flower from a different plant.
E.g: Jowar, Cotton, Broad bean, Jute, Rai, Carrot, Onion, Turnip, etc.