Archive for the ‘Agriculture’ Category
Black Swan White Mountain
Everyone knows that tree rings mark annual variations in tree growth. Biomass production is influenced by climatic variability (precipitation,temperature, sunlight) or disease, pests, fire etc. Tree rings can be measured very accurately and used to recover information about past climate over thousands of years. The World Data Center for Paleoclimate (NOAA) maintains a tree ring [...]
May 26, 2009
Posted in: Agriculture, Climate 
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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 No Comments
