Yes, but it while it may be toxic levels, it is not toxically available unless
it is met with other elements.

It is not available, period! While there might be an excess of phosphorous,
that doesn't mean plants don't need bio-available phosphorous to thrive.
Our plants respond great to bone meal. I'm sure if we test our soil it would
be high in phosphorous.

--
Victor M. Martinez

http://www.che.utexas.edu/~martiv