References
- Bengtsson, L., Seuna, P., Lepistö, A. & Saxena, R. J., 1992: Panicle movement of meltwater in a sub-drained agricultural basin. — J. Hydrology 135: 383–398.
- Brink, N. & Jernlås, R., 1982: Utlakning vid spridning höst och vår av flytgödsel. Abstract (Leaching after spreading of liquid manure in autumn and spring). — Uppsala, Sveriges Lantbruksuniversitet, Avdelningen för vattenvård. Ekohydrologi 12: 3 -14. (in Swedish with English abstract).
- Ekholm, P., Yli-Halla, M. & KylmÄLÄ, P., 1991: Availability of phosphorus in suspended sediments estimated by chemical extraction and bioassay. — Verh. Internat. Verein. Limnol. 24: 2994–2998.
- Gustafson, A. & Torstensson, G., 1984: Växtnäringsförluster i Offer (Abstract. Leaching of nutrients at Offer). — Uppsala, Sveriges Lantbruksuniversitet, Avdelning för vattenvård. — Ekohydrology 15: 39–52. (in Swedish with English abstract).
- Isermann, K., 1990: Share of agriculture in nitrogen and phosphorus emissions into the surface waters of Western Europe against the background of their eutrophication. — Fert. Res. 26: 253–269.
- Jaakkola, A., 1984: Leaching losses of nitrogen from a clay soil under grass and cereal crops in Finland. — Plant and Soil 79: 59–66.
- Kauppi, L., 1984: Contribution of agricultural loading to the deterioration of surface waters in Finland. — Publ. Water Res. Inst. Finland 57: 24–30.
- Kemppainen, E., 1989: Nutrient content and fertilizer value of livestock manure with special reference to cow manure. — Ann. Agric. Fenn. 28: 163–284.
- Källqvist, T. & Berge, D., 1990: Biological availability of phosphorus in agricultural runoff compared to other phosphorus sources. — Verh. Internat. Verein. Limnol. 24: 214–217.
- Melanen, M., Jaakkola, A., Melkas, M., Ahtiainen, M. & Matinvesi, J., 1985: Leaching resulting from land application of sewage sludge and slurry. — Publ. Water Res. Inst., Finland 61. 124 p.
- Ministry of the Environment, 1988: Water Protection Programme to 1995. Decision-in-Principle by the Finnish Council of State. — Ministry of the Environment, Finland. Environmental Protection Department. Series B/14/1989.20 p.
- National Board of Waters, 1981: Vesihallinnon analyysimenetelmät (Water quality analyses methods). — Publ. Nat. Board of Waters, Finland. Report 213: 136 p. (in Finnish).
- National Board of Waters, 1984: Hydrologiset havainto-a mittausmenetelmät (Hydrological observation and measuring methods). — Publ. Nat. Board of Waters, Finland 47: 88 p. (in Finnish).
- Overgaard, K., 1984: Nitrate pollution of groundwater. XX nordiska symposiet om vattenforskning, Hägersten 8.-10. 5. 1984. — Nordforsk Miljôvårdsserien, Helsinki. Publikation 1984 (2): 107–118.
- Pietiläinen, O.-P. & Rekolainen, S., 1991: Dissolved reactive and total phosphorus load from agricultural and forested basins to surface waters in Finland. — Aqua Fennica 21: 127–136.
- Rekolainen, S., 1989: Phosphorus and nitrogen load from forest and agricultural areas in Finland. — Aqua Fennica 19: 95–107.
- Rekolainen, S., Kauppi, L. & Turtola, E., 1992: Maatalous ja vesien tila. (Summary. Agriculture and the state of waters). — Ministry of the Agriculture and Forestry, Finland, 61 p. (in Finnish with English summary).
- Strebel, O., Duynisveld, W. H. M. & BÖTtcher, J., 1989: Nitrate pollution of groundwater in Western Europe. — Agriculture Ecosystems and Environment 26: 189–214.
- Uhlen, G. & Østerud, J. G., 1992: Nitrogen fosfor og kalium i graftevannspraver fra dyrket mark (Abstract. Nitrogen, phosphorus and potassium in drainage water from cultivated land). — Norsk landbruksforskning 6: 61–72. (in Norwegian with English abstract).