Agricultural run-off management land report of Estonia : final report 1994-1997Loigu, Enn; Kuldkepp, Paul; Iital, Arvo; Bogun, Gennadi; Tamm, Toomas; Raia, Tiiu; Gutmann, Enn; Carlson, Göran1997 https://www.ester.ee/record=b4284537*est Nitrogen balance in a small watershed : an 8-year case studyTamm, T.; Kuldkepp, Paul; Loigu, EnnProceedings of NJF's 22nd Congress "Nordic Agriculture in Global Perspective" : July 1-4, 2003, Turku, Finland2003 / p. 123