Nitrogen application, balances and their effect on water quality in small catchments in the Nordic-Baltic countries - Bechmann, Marianne; Blicher-Mathiesen, Gitte; Kyllmar, Katarina; Iital, Arvo; Lagzdins, Ainis; Salo, Tapio (Elsevier Science, 2014)
Keywords: long term monitoring; manure; agriculture; fertilizers; surpluses