Thanks for the info. Two interesting well written articles about soil and
trees are here: Thought you might enjoy them. They are written by a man
who was a foremost authority on trees world wide. Or shall I say viewed by
many, mostly those who looked through his microscope with him. Many
It would be nice if they went to old growth forest and obtained optimal
fertility levels for trees (species specific).
A Touch of Chemistry
Troubles in the Rhizosphere
John A. Keslick, Jr.
Consulting Tree Biologist
Beware of so-called tree experts who do not understand tree biology.
Storms, fires, floods, earthquakes, and volcanic eruptions keep reminding us
that we are not the boss.
Some people will buy products they do not understand and not buy books that
will give them understanding.
That was interesting but another page, about how tree ferns can soak up
arsenic from contaminated land, was too. I was amused by the statement:
" ... ferns clean up contaminated soil by a process called phytoremediation.
A contaminant -- like arsenic -- is absorbed through the plant's roots. The
arsenic then moves up to the leaves where it's stored. The leaves can then
be cut off. "
And then what? How do you dispose safely of the leaves??
Yes, I saw that one, but wasn't sure if it would be of interest.
After all, how many of us gardeners have arsenic-y land? <g>
But now that the question has been raised, how/why DOES
land become contaminated with arsenic? Any chemists around
who might know whether it is a by-product of some industrial
or milit ary process?
Approximately 20 incidents of groundwater arsenic contamination have
been reported from all over the world.  Of these, four major
incidents were in Asia, including locations in Thailand, Taiwan, and
Mainland China.  South American countries like Argentina and Chile
have also been affected. There are also many locations in the United
States where the groundwater contains arsenic concentrations in excess
of the new Environmental Protection Agency standard of 10 parts per
Arsenic is a carcinogen which causes many cancers including skin, lung,
and bladder as well as cardiovascular disease.
Do you believe this poster? "Arsenic comes from the natural world".
Yeah, but how is it used in the "un-natural" world?
Try doing a Web search with keywords like "industry. military and
agribusiness uses of arsenic".
Just ONE hit:
OK, one more:
Can anyone believe you are just asking about arsenic exposure? You
challenge my statement, then you agree with me? I was writing about
arsenic in ground water and you want to deprecate my character for that?
If you want to expand the parameters of your search, why don't you
include Googling arsenic and flying saucers, my identity challenged
little friend? Who are we today, Persephone, Queen of the Underworld and
Goddess of Spring, or Aspasia, the brothel keeper and harlot?
ALL RIGHT! Don't forget to hold your breath.
While she is quiet, you might Google
where with nice color graphs, it shows that we have been dragging
arsenic, in the form of treated lumber into our back yards for years,
until 2003. A lot of children's playground equipment is made with
treated lumber which contaminates their hands, and as children do, there
hands end up in their mouths. Not good. Agriculture is another source of
arsenic, from pesticides to animal feed(???!). If your aquifer, is
contaminated by a land fill that could be another source of asenic.
I'm not sure what the military use of arsenic would be, they already
have "depleted uranium" to play with, but it certainly would be a
consideration (especially when you think of all the perchlorate (rocket
fuel) that has found its' way into our lettuce). Then, of course,
there is always the Roswell connection.
You know it's not really research when you predetermine the
outcome and then only use facts that support your position.
QED my tuchus.
So would the EPA. At present, a clay lined pit seems to be the only
answer. Sequestering arsenic with iron can remove/reduce arsenic from
drinking water but the arsenic becomes mobile again with time:-(
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