"Moosh:]" wrote in message You seem confused. Do
you mean by "deal with nutrient", "replace those
extracted and exported with the crop?
I've never heard of yellow cake in rock phosphate, but if it occurs,
so what. If it's radioactive it is best avoided.


They had problems with this in Cumbria, not with Yellow cake but with rock
phosphate. A Cumbrian firm used to buy rock phosphate (from Morocco I think)
and make phosphoric acid, which they used in various processes. The waste
rock (crushed to power in the process, was just flushed back into the sea
from which it had initially come umpteen million years previously.
The sea of Cumbria is very closely monitored because of Sellafield Nuclear
Power Station, and it was discovered that actually there was so much
naturally occurring uranium in this ground up rock that they were bigger
polluters than Sellafield was.

Jim Webster