10 de Vries, W Kros, H Reinds, G J de Winter, W Verweij, P Wien, J E Velthof, G Oudendag, D 2006 INTEGRATOR: A modelling tool for European-wide scenario assessments of nitrogen budgets and greenhouse gas emissions. Modelling Modelling approach, calculation procedures, application methodology and technical design of a prototype NitroEurope IP C5.1-5.5 Month 12