World Production of Phosphate Rock

source of P for production of phosphate ... Reserves Reserve base 1995 1996 1997 Countries million tons thousand tons ... 400 200 0 1960 1964 1968 1972 ...

400 millons phosphate reserves - bapan

Not quite assured Journal ... suggest that phosphate rock deposits should last for between 300 and 400 ... Accurate information about phosphate reserves is ...

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