Let's pull some leaves off from our plants while we read some of this,
"
Only unrefined minerals can be used on "organic" crops and these
often don't dissolve well or contain quantities of impurities, some
of which are even relatively toxic but are "natural” and therefore
“okay”, according to organic standards. For example, mined
phosphate may contain excessive amounts of fluoride, good for
teeth in very small quantities, but harmful to humans in excess.
Mined phosphate also can contain small amounts of radioactive
elements such as radium, which releases radon, also not good for
human health. Chlorides, too, are permitted for organic cultivation
but though they are naturally mined, they can be bad for both
plants and soil, especially if used in excess. Some soils used by
organic farmers contain such toxic elements as selenium, which
can accumulate in the plant tissues and produce. Amazing, isn't it?"