Peak phosphate

In "The history of phosphorus: Global food security and food for thought" Dana Cordell et al (Global Environmental Change, 19, 2009, 192-305) concluded that humanity became addicted to phosphate rock. Modern agriculture is relying in a non renewable resource. We need physical and institutional changes to avoid compromising severelly our future, because future phosphorus scarcity is not beeing addressed in a long term and equitable phosphate rock management point of view.