John Vico: Plant zapper

John,

This has been a continued issue of discussion for quite some time.  It
would be fantastic if you could do that sort of experiment.  I would like
to hear what your plans are, and what materials and equipment you have to
work with.  

Rick

----------
> From: John J Vico <jjv8@cornell.edu>
> To: pumpkins@mallorn.com; sdeans@pcug.org.au
> Subject: Re: Flow rates
> Date: Friday, January 23, 1998 7:36 AM
> 
> At 20.57 22/01/98 +1100, you wrote:
> >G'day gang,
> >I was thinking that all the nutrients that go into the pumpkin have to
flow
> >along the thin pipe that feeds the fruit. At the moment my fruit are
putting
> >on about 15 kg a day through a vine of about 2-3 cm in diameter, that is
a
> >cross-sectional area of about 7 sq cm. Assuming the liquid weighs about
1kg
> >per litre then we have a flow rate of 15 liters per 24 hrs through 7 sq
cms.
> >That means about 100 ml per hour per sq cm of cross-section (and faster
at
> >night). This should be measurable along the lines that blood flow is
> >measured. We have a conductor (the liquid) and by creating a magnetic
field
> >you would generate an electric field, the strength of which would
indicate
> >the flow rate.
> >By clamping sensors based on this principle around various vines you
could
> >determine where the nutrients were going. It should be easier in a well
> >trimmed Christmas Tree vine.
> >Does anyone know if such sensors are used in plant science?
> >Stewart ACT Aust
> >sdeans@pcug.org.au
> >
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> Stewart,
> 
> This is an interesting concept. In fact you are talking about a type of
> magnetic resonance imaging (MRI) which I am involved in directly as a
> radiologist. I am also the one who plans to use some radioactive water
this
> summer on some of my plants to try and answer some of our nutrient and
flow
> questions. On the surface your idea seems a little far fetched because
the
> strength of the magnets, coils, cryogens etc make for a very combersome
> machine, at least in human imaging. I wouldn't be surprised however if
> there is such a device for plants or perhaps some other flow measuring
> device that would be applicable. I'll check with the experts here at
Cornell.
> 
> Once again I would ask for the input of this group to come forth with
ideas
> and questions before I design an experiment that turns out to be of
little
> practical use even if I can pull it off.
> 
> 
> 
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