To: "'permaculture'" <permaculture@lists.ibiblio.org>
Subject: [permaculture] pH meters
Date: Wed, 18 Jan 2006 10:26:44 -0000
Please do you know what's inside pH meters? The probe sort (presumably an
electrical response?)rather than chemical colour change paper or liquid. And
do they have a set lifespan ? (finally got round to doing pH tests I'm
supposed to do over my field and it don't move from 7!)
I'd also be interested to hear what you think about testing and worrying
about pH on a mulched garden