http://www.mongabay.com/images/commodities/charts/chart-index_fertilizers.html
This graph indicates why, at the height of the GFC, CNX commercialisation path was reconfigured to focus on electricity generation initially.
But don't doubt that fertiliser is still part of the plan. IPL's long-term commitment to CNX was reaffirmed when they increased it's holding by 4.5 million shares on 3 March 2010.