Weird question on phenology

[tabdelaz at itsmail1.hamilton.edu]

In article <11OCT94.11443187 at skyfox.usask.ca>, shiell at skyfox.usask.ca
(KEVIN SHIELL) wrote:

> There are a number of reason for the trees turning color....It seems that
> light (day length) is probably the biggest driving force although
> moisture (rainfall) is a factor.

**This fact is usually misconstrued...it is actually the length in
DARKNESS that triggers physiological changes in the plant...not light.
> 
>nondo