World Fertilizer Prices Soar (IMAGE) IFDC Caption World fertilizer prices, especially diammonium phosphate, rose sharply in 2007 then skyrocketed -- off the chart -- from January to April 2008. Credit Graph by IFDC from information obtained from Green Markets and FMB Weekly. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.