Phenology files:
   - created by B. Cook, bcook@essc.psu.edu
   - based on changes in light intercepted by forest canopy
   - day of year reported for each event

Column
0   Year
1   Leaf-out date
2   Full expansion
3   Defoliation initiated (2001 only)
4   Reflush begins (2001 only)
5   Leaf-fall begins
6   Leaf-fall complete
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