Concept
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The Importance of Productivity
![Productivity Gains](../../../../../../../../../figures.boundless-cdn.com/8903/full/loping-countries-1951-2004.jpg)
Productivity Gains
Wheat production has increased as the productivity gains improve, particularly since the 1980s.
Source
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"Wheat yields in developing countries 1951-2004."
http://en.wikipedia.org/wiki/File:Wheat_yields_in_developing_countries_1951-2004.png
Wikipedia
Public domain.