
The SciencesJune 1, 1982
Phosphate Rock
This essential raw material for fertilizer is widely distributed but unevenly mined and consumed. Now its geologic origins are becoming clearer, and more deposits are likely to be discovered

Phosphate Rock
This essential raw material for fertilizer is widely distributed but unevenly mined and consumed. Now its geologic origins are becoming clearer, and more deposits are likely to be discovered