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Trees in pots
On Wed, 20 Nov 2002 12:36:24 +0000, Kay Easton
wrote: But if there is a barrier dividing the water into two, and this barrier is such that water can get through but salt can't, the tendency is still to try to even out the strength of the solution across the barrier, but the only way this can happen is for water to go through the barrier from the dilute side to the concentrated side. This is osmosis. Capilliary action is the tendency for water to seep from wet area to dry area - which can happen upwards if the route for seepage is small - eg it's between the particles of soil. Yup, I got the wrong term. At school I believe they called it capillary action. Anyhoo, I wouldn't want to stand a pot in water unless it there was some charcoal or something else to sweeten the water. It could get very fetid otherwise and full of nasties. Hussein |
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