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NOTE: To get off this list, send email to majordomo@aqua.ccwr.ac.za with the body of the message containing the line: unsubscribe sowacs Referring to quotes from the message (below, by Cliff.hignett@soilwater.com.au) saying: " I would NOT recommend TDR in that environment. The TDR only works when there is a continuous water film. Isolated water does not register". and "I see no reason why tensiometers would not work ". 1. I am interested in being reminded of a recent, reviewed journal article stating the requirement of continuity to enable water sensing by a TDR probe. 2. If you soak a coarse filter paper (a few layers perhaps to increase the effect) and place it between the probes rods without actually touching the rods, you'll notice the change in apparent length. 3. Aren't tensiometers more prone to 'water film continuity' ? 4. I would hate to use the term 'filtering' but what about the credibility of our little precious website? arie Arie Nadler, Hort Research, Palmerston North, private bag 11030 New Zealand 64-6-356-8080 ext 7746 fax:64-6 354-6731 Home 64-6-356-4269