The symposium will deal with such pressing matters as phosphorus scarcity, which can limit crop production in many agronomical ecosystems, and management of excess phosphorus, which gives rise to problems of eutrophication mostly in aquatic ecosystems. The scope of the topics will range from fundamental insights of phosphorus biogeochemical cycles to applications such as crop breeding, fertilizer development, soil management and performance of environmental impact assessments. The conference also aims to attract a large number of scientists from developing countries where phosphorus scarcity is a major issue.