[stiguy]

Potash is the primary source for potassium, a key ingredient in fertilizer.

See: http://en.wikipedia.org/wiki/Potash

[Ruy Dias de Bivar]

***Potash is the primary source for potassium, a key ingredient in fertilizer.***

Maybe it is time to reopen the potash mines east of Carlsbad, NM. Just ignore that residual radiation from the Project Gnome blast back around 1962.