Heating cable questionaire

>From: Pat Bowerman <bowerman at rog_ar.ispnet.com>
>Date: Wed, 06 Mar 1996 19:40:10 -0800
>Subject: Substrate Heating
>OK, just when I thought I had it figured out, I hear something different.
>Is the purpose of heating the substrate:
>A: Plants need warm roots
>B: we are trying to create alternating zones of warm & cool so that we
>improve water circulation and therefore nutrient exchange.
>C: By heating the substrate, we improve the plants' abililty to use the
>available nutrients in some magical way that we will never understand.
>D: It gives us something to spend our money on, and is really just a mean
>trick played by those crazy guys at Dupla.
>E: None of the above

Pat, you forgot --  F: *All* of the above. :)

in overcast Vancouver