Investigation of the temporal changes in the nutrient pollution load from the small watersheds in EstoniaBlinova, Irina; Vassiljev, AnatoliProc. 8th IWA International Conference on Diffuse/Nonpoint Pollution : 24-29 Oct. 2004, Kyoto, Japan2004 / p. 893-900 Modeling of nitrogen leaching from a watershedVassiljev, AnatoliProc. 8th IWA International Conference on Diffuse/Nonpoint Pollution : 24-29 Oct. 2004, Kyoto, Japan2004 / p. 235-240