... Asia The fused calcium-magnesium phosphate (FMP) is a kind of citric acid soluble phosphate-based multiple-element fertilizer, being of chocolate ... , it also contains some medium and trace elements such as calcium, magnesium, iron, manganese, silicon, sulfur, etc, which can be ... and used by plants.The fused calcium-magnesium phosphate can be used more suitably as base fertilizer or raw material of the ...