Microchips in lieu of labels

Boyce Tankersley btankers@gmail.com
Tue, 17 Mar 2015 13:16:40 PDT
We had a group of Northwestern University engineering majors tackle the
problem of using RFID in a garden setting a couple of years back as a class
project.  They discovered the capture rate of the RFID tags increased to 20
feet if the reader used a spiral wave pattern instead of the traditional
line of sight straight lines.  Straight line of sight failed more often
than not because of obstructive leaves, branches, etc.  I experimented with
T-budding a RFID chip under the bark of a spare willow seedling in the
nursery but the little 'antennae' that I had left exposed beyond the bark
corroded after a couple of years.
Contact me at my personal email address for name and make of equipment that
they found worked under mulch, couple of feet of snow or buried within one
of our boxwood hedges.

Boyce Tankersley
Director of Living Plant Documentation
Chicago Botanic Garden

where a week of above freezing temperatures has finally melted most of the
snow to the flowering delight of Galanthus, Eranthis, Iris reticulata,
Adonis - and gardeners.

On Tue, Mar 17, 2015 at 10:45 AM, penstemon <penstemon@q.com> wrote:

> We have so much discussion on various forums over what is sand or grit or
> gravel; but rock mulch! How large is that and what shape? or is it just
> another name for some of the 3 above.
> Pea gravel. What I believe is called shingle in the U.K. Years of applying
> the “annual approved topdressing” (I read a lot of Graham Stuart Thomas),
> the raised beds have become mostly gravel, with some clay.
> Here, we mulch with shingle, but only after a hailstorm.
> Bob Nold
> Denver, Colorado, USA
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