First established in 1954, the International Plant Nutrition Colloquium (IPNC) is an international conference held every three-five years. Its aim is to promote research within the field of plant nutrition and is the most important international meeting on this subject. Until 1981, the meeting was known as the International Colloquium on Plant Analysis and Fertiliser Problems, while now more than 800 delegates attend each meeting. Generally, the IPNC meetings cover research in the fields of plant mineral nutrition, plant molecular biology, plant genetics, agronomy, horticulture, ecology, environmental sciences, and fertilizer use and production.