Basic fertilization: P2O5 60 to 80 kg/ha K2O 60 to 80 kg/ha Do not use chloride-containing fertilisers! No limescale immediately before cultivation! Nitrogen fertilisation: 60 to 80 kg/ha less Nmin; with too much nitrogen increased weed growth, longer flowering time, delayed ripening! Organic fertilisation to previous crops, not immediately before buckwheat! High demand for trace elements (boron, molybdenum).