What do you make of Phosphorous article in todays FR ?
Shawn
I couldn't see anything in the weekend AFR about phosphorus. Maybe it was in the Friday AFR that I didn't see?
There have been some recent articles about 'Peak Phosphorus' in some papers including the latest 'THE LAND'.
http://www.abc.net.au/science/articles/2010/08/05/2973513.htm
modern agriculture has become completely dependent on using phosphate rock as a basis for fertilisers, says Cordell. "We have essentially become addicted."
The trouble is that the global supply of that rock is running out. According to Cordell, "current global reserves will be depleted in 50 to 100 years."
Phosphorus will probably never run out. It is being exported from farm land to city sewers, and it is being exported from farm land of food exporting nations, to the sewerage systems of food importing nations.
If the worlds supplies of rock phosphate run out, there will have to be some very expensive recycling sysyem set up to get it back from where it ended up, and this will cost an absolute fortune. A bit like oil, it will be the end of cheap phosphorus.
Most of australia's soils are the poorest in the world when it comes to phosphorus and thats why a lot of it is only good enough to grow trees and not much else. Mine are a bit of an exception, and we grew grain for 40 years without even needing phosphorus, but finally it ran out and we now supply the full amount per crop.
As with anything that causes food production to drop, farmers will be winners, and consumers the losers, so I'm not too concerned. It will be up to others to find a solution.
See ya's.