[Stoves] Phosphate bonding of clay and other speculations

[Carefreeland at aol.com]

In a message dated 6/6/06 11:18:28 AM Eastern Daylight Time, 
crispin at newdawn.sz writes:

> What natural processes form them?  What are the readily available sources 
> of phosphates?  
> 
> Grass
> Fertilizer (I was thinking of artificial fertilizer which is widely 
> available?
> Dung
> The raw materials for detergents
> Phosphoric acid (sounds dangerous)
> What about laundry soap?  Omo? Tide?
> Bat guano
> Chicken 'litter'
> Rabbit manure
> 

DD How about BONE MEAL? 

                Dan Dimiduk