Large-scale leases of African farmland by foreign investors risk driving conflict and fueling corruption in the region, farm experts said Monday at a conference on agricultural research and development. But if regulations for responsible foreign land investment can be drafted and followed, such leases could provide a much-needed cash infusion for African agriculture which has struggled to find investment elsewhere, they said. But even with new guidelines on land leases in Africa, the deals could lead to growing problems down the road, warned Emmy Simmons, a longtime USAID official and board member of the Partnership to Cut Hunger and Poverty in Africa.