Grapevine phenology and GDD accumulation

GDD base 50 accumulated since April 1 = +3950 (+443 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+3950 = 4256

Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

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