In The Netherlands, an intense growth in animal husbandry has taken place during the past decades. This growth induced major shifts in the national nitrogen and ammonia balance, with feedstuff being imported from abroad and animal waste being used in excess in Dutch agricultural areas. Growing environmental responsibility, which was triggered by scientific observations on field-scale early-on, resulted in putting animal waste and ammonia on the political agenda. Governmental regulations were put in effect and research programs were set-up to develop techniques to measure and reduce ammonia...