Healthy soil and sustainable growing

["Amanda Peck" <ap615@hotmail.com>]

Bennett thought that it sounded like a good idea.

I do too.

But if you are looking on the web for more information on what is being 
described you will get better results looking for--"cool tubes"  "earth 
tubes"  "AGS" which is "Annualized Geo Solar" or "PAHS"  which is "Passive 
Annual Heat Storage."  The latter two are mostly about heavily 
insulated--underground is good--buildings.

Your tubes do need to be way on down there.  Eight or ten feet (two and a 
half or three meters) so as to get to your "average annual temperature" 
without much in the way of fluctuation.  And no ground water--at least for 
the winter.

I would think that almost any high ventilation will work in the summer, not 
sure about what one would do in the winter for a small system in a not 
particularly insulated setting.  I know people who blow excess winter heat 
(solar) from their attached greenhouse into the house with a fairly small 
fan, mostly just open the greenhouse up in the summer.  They've got barrels 
of non-freezing liquid to absorb the heat for night.  Solar only during the 
winter.  This doesn't work on their detached greenhouse.

Here's one link to try--they do talk about how to lower the tubes into the 
ditch safely:

http://www.naturecenter.com/

Amanda