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I was
told this by a very reputable and knowledgeable professor emeritus.
But I
can't say that it applies to all plants. The discussion was specifically about
oak leaves and the fact that the pH levels varied with soil pH. I should have
said that caveat. Next time I talk with him, I'll ask about other
species.
Rain
is acidic and over time will change basic soil to acidic. The action is very
slowwwww, think millenia. But the point is that you can't measure the pH of the
top of the soil and know what pH the roots are in.
Thanks
to Ginda for pulling up Jim's old post. :)
Kurt
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