Page last updated at 12:43 GMT, Tuesday, 25 October 2011 13:43 UK

Is industrialised farming good or bad for Africa?

Fergal Keane travels to Zambia to see firsthand the effects of large-scale commercial farming on crop yields and the local population, and to examine claims that it offers not only the hope of solving Africa's food shortages, but those of the rest of the world too.

Broadcast on Monday 24 October 2011.

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