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Originally Posted by Michaelangelica
fascinating observation. (thinks ) So the extra heat does what? helps/hinders soil microorganisms?
Drys out soil -probably not in amazon
Would it help my plants in pots/
I have heard of people putting aluminium foil on pots to reflect light back up into plants; Charcoal would do the opposite.
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Thinking....
1) I don't know about warmer soil helping microorganisms; so many other variables come into play.
2)I just learned about evaporation tray set-ups for measuring evaporation rates (see Global Dimming thread). They said that photons striking water account for most evaporation rather than wind, or temp, or humidity. Since the charcoal is not only absorbing heat, but also blocking the soil under it from the Sun, I don't think evaporation increase is expected.
3) Early in this thread, Uncle Al recommends charcoal in potted plants & gives some justifications.
4) Foil does work, but it is unsightly & reflects light unevenly. White material reflects light more evenly so you might use cardboard, house-wrap or other white plastic film.
Off to read your link:
http://www.eprida.com/hydro/
