Weird question on phenology

tabdelaz at tabdelaz at
Fri Oct 14 09:15:23 EST 1994

In article <11OCT94.11443187 at>, shiell at

> 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 is actually the length in
DARKNESS that triggers physiological changes in the plant...not light.

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