MARK TRAN – Amid warnings that land deals are undermining food security, the head of the UN’s Food and Agriculture Organisation (FAO) has compared “land grabs” in Africa to the “wild west”, saying a “sheriff” is needed to restore the rule of law. José Graziano da Silva, the FAO’s director general, conceded it was not possible to stop large investors buying land, but said deals in poor countries needed to be brought under control.