The International Scientific Center of Fertilizers (CIEC) is a non-profit and non governmental international scientific society founded in 1933. CIEC is an association of scientists, scientific institutions, fertilizer industries and trade companies, agricultural consulting services and any other fertilizer-minded institution or person that is interested in plant nutrition, soil testing for plant nutrient needs, fertilizer demand and for the evaluation, application and technology of fertilizers (mineral and organic). For further information you are welcome to visit http://www.pb.fal.de/en/. The central scientific event organised by CIEC is the World Fertiliser Congress (WFC, list of former events see below) which is held every 4  years and brings together scientists and decision makers interested in soil fertility and fertilizer use from all over the world.