North American Fruit Explorers mailing list at ibiblio

[Lawrence London <lfljvenaura@gmail.com>]

On Wed, May 20, 2015 at 7:42 AM, Mike Levine <mlevine@umich.edu> wrote:

> I considered using some once, but the particular product we were were
> looking at had a tiny bit of radioactive material in it.  It was just a
> small amount, but we were advised by a friend who does environmental
> testing not to use it for that reason.  Every little but of radiation is a
> little bit more you just don't want around.  Radon is common in our area
> and is formed by the break down of these heavier radioactive elements so
> it's believable that even a small amount of radioactive material in rock
> dust could be harmful.
>

Thanks for the heads-up. I have heard about radioactivity issues with rock
phosphate,
particularly the Florida types, possibly Tennessee too, don't know about
the Idaho.
As for quarry dusts, I suppose it may exist, maybe with certain types of
granite (a kind of gravelly rock used for driveways in my region). Radon is
a problem in many areas and sealing cracks and perimeter of ground contact
concrete slabs is necessary; there may be well water issues too.

I'll check tonight to see if my feet and hands are beginning to glow. As
for my use of quarry dusts I feel the benefits far outweigh any risks.


-- 
Lawrence F. London
lfljvenaura@gmail.com
Ello: @ecoponderosa <https://ello.co/ecoponderosa>
https://sites.google.com/site/avantgeared/
https://sites.google.com/site/venaurafarm/