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Dutch dairy cows and pigs produce an estimated 118m kg of phosphate and 342m kg of nitrogen (after emission) in their manure in 2020, while in the Netherlands there is only room for these manure types of 113m kg of phosphate and 342m kg of nitrogen (with derogation). Calculations with the MERIT model show that the economically optimal solution requires a joint effort. Dairy farming lowers the mineral content in the feed and separates part of the manure. Fattening pig farming does not lower feed levels and processes a part of the manure. Breeding pig farming sometimes lowers feed levels and sometimes processes the manure. Of the scenarios, ‘Abolition of derogation’ has a greater effect on the total manure chain costs than ‘Use of phosphate from sewage sludge in agriculture’.

Economische optimalisatie van de afzetketen voor varkens- en melkveemest : scenarioanalyse met het MERIT-model