Since 2003 there has been an almost constant level of manure production and excretion of nitrogen and phosphate. Provisional figures for 2008 however show an increase in manure production by 3 percent compared with 2007. The extra manure production contains nearly 15 million kg of nitrogen and more than 5 million kg of phosphate
Time series from 1990 has been revised based on new scientific insights. The calculations are performed in accordance with the methodology of the Working group for the Uniformisation of the calculation method of Manure and nutrient figures (WUM).