Yes I agree with Ray on this one and want to add that a Physician in Australia cited a scientific study that said the cancer rate in Australia increased in direct proportion to the increase use of Phosphated fertilizer.
There are always studies that prove drastic and bad consequences but I think at the very least we can say that the addition of phosphate to our water and food supply is not good. In addition its almost certain that it is not necessary in high quantities. The reason fertilizer conpanies sell it is because people buy it.