South Africa’s government has contingency plans in place to safeguard key food-production facilities against an escalation in power cuts that are already at record levels, the nation’s agriculture minister said. Africa’s most industrialized economy has been subjected to rolling blackouts, known locally as loadshedding, since 2008 because state power utility Eskom Holdings has been unable to meet demand from its old and poorly maintained plants. The problem has escalated since last year, raising concerns that food security is at risk.