measuring pH of roots

Amy J. Harris ajharris at
Tue Mar 14 14:57:58 EST 1995

I am doing research on determining how much plants(grasses) change the pH 
of the soil around their roots.  I am currently using a standard pH meter 
and probe.  I am curious if anyone else has done anything like this.  I 
have read in the literature about microelectrodes but I don't know 
anything about them.  The hypothesis is that one grass that I 'm studying 
can pump protons to acidify the surrounding soil so as to make it 
"easier" to take up minerals such as phosphorous (PO4).  If you have any 
information about this topic please send it to my e-mail address.

Thank you,
ajharris at

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