Archive for April, 2009
Maize Yield Variability
A typical time-series of FAO crop yields consists of random variations about a slowly varying trend. The trend can be fit by a smooth curve, which is close to linear in many cases. The residual yield variation (difference between actual yield and trend yield) for top maize producering countries between 1961 and 2007 is shown [...]
April 9, 2009
Posted in: Agriculture 
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Global Agriculture’s Bull Run
The graph shows global average yields of some major agricultural crops from 1961 to 2007. The source of the data is the Food and Agriculture Organisation (FAO) of the United Nations[1]. The remarkable improvements in the yields of most major crops since the 1940s is known as the Green Revolution.В Per capita calorific [...]
April 1, 2009
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