Agricultural innovation offers only path to feed Africa and the world | by @calestous http://bit.ly/10Lo6jK
@RichardTol @mark_lynas @azzubairm All agriculture proceeds by trial-and-error so Africa is no exception.
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@calestous@RichardTol@mark_lynas But Africa doesn't need to 're-invent the wheel' when it's clear major cause of the low yield is methods.Thanks. Twitter will use this to make your timeline better. UndoUndo
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