[Grennfelt, P., Thörnelöf, E. (Eds). Critical loads for nitrogen. In: Report from a Workshop held in Lökeberg, Sweden, April 6-10, 1992. Copenhagen, 1992, p. 428.]Search in Google Scholar
[Gundersen, P., Emmett, B. A., Kjonaas, O. J., et al. Impact of nitrogen deposition on nutrient cycling in forests: a synthesis of NITREX data. Forest Ecology and Management, 1998, N 101, p. 37-56.10.1016/S0378-1127(97)00124-2]Search in Google Scholar
[Erisman, J. W., de Vries, W. Nitrogen deposition and effects in European forests. Environmental Reviews, 2000, N 8, p. 65-93.10.1139/a00-006]Search in Google Scholar
[Aber, J. D., Goodale, C. L., Ollinger, S. V., et al. Is nitrogen deposition altering the nitrogen status of North-eastern forests? BioScience, 2003, vol. 4, N 53, p. 375-389.10.1641/0006-3568(2003)053[0375:INDATN]2.0.CO;2]Search in Google Scholar
[Galloway, J. N., Aber, J. D., Erisman, J. W., et al. The Nitrogen Cascade. BioScience, 2003, vol. 4, N 53, p. 341-356.10.1641/0006-3568(2003)053[0341:TNC]2.0.CO;2]Search in Google Scholar
[Matson, P., Lohse, K. A., Hall, S. J. The globalization of nitrogen deposition: consequences for terrestrial ecosystems. Ambio, 2003, vol. 2, N 31, p. 113-119.10.1579/0044-7447-31.2.113]Search in Google Scholar
[Achermann, B., Bobbink, R. (Eds.). Empirical Critical Loads for Nitrogen. In: Proceedings of an Expert Workshop held in Bern, Switzerland, November, 2002. Bern, 2003, p.325.]Search in Google Scholar
[De Vries, W., Kros, H., Reinds, G. J., et al. Developments in deriving critical limits and modelling critical loads of nitrogen for terrestrial ecosystems in Europe. In: Alterra Report 1382. The Netherlands, 2007, p. 206.]Search in Google Scholar
[Posch, M., Hettelingh, J.-P., Slootweg, J.Manual for dynamic modelling of soil response to atmospheric deposition. Bilthoven, 2003, 315 p.]Search in Google Scholar
[Posch, M., De Vries, W.Derivation of critical loads by steady-state and dynamic soil models. Kluwer : Dordrecht, 1999, p. 213-234.10.1007/978-94-017-3356-4_7]Search in Google Scholar
[De Vries, W., Posch, M. Critical levels and critical loads as a tool for air quality management. In: Handbook of Atmospheric Science. Principles and Applications. Blackwell Science, Oxford, UK, 2003, p. 562-602.10.1002/9780470999318.ch20]Search in Google Scholar
[De Vries, W., Reinds, G. J., Posch, M., et al. Intensive monitoring of forest ecosystems in Europe. In: Technical report 2003. Forest Intensive Monitoring Coordinating Institute (FIMCI), EC-UNECE, Brussels, Geneva, 2003, p. 161.]Search in Google Scholar
[Driscoll, C. T., Fuller, R. D., Schecher, W. D. The role of organic acids in the acidification of surface waters in the eastern U. S. Water, Air and Soil pollution, 1989, N 43, p. 21-40.10.1007/BF00175580]Search in Google Scholar
[Oliver, B. G., Thurman, E. M., Malcolm, R. L. The contribution of humic substances to the acidity of coloured natural waters. Geochimica et Cosmochimica Acta, 1983, N 47, p. 2031-2035.10.1016/0016-7037(83)90218-1]Search in Google Scholar
[Evans, C. D., Caporn, S. J. M., Carroll, J. A., et al. Modelling nitrogen saturation and carbon accumulation in heatland soils under elevated nitrogen deposition. Environmental Pollution, 2006, N 143, p. 468-478.10.1016/j.envpol.2005.12.004]Search in Google Scholar
[Posch, M., Slootweg, J., Hettelingh, J. P. (Eds.). European Critical Loads and Dynamic Modelling. In: RIVM Report No. 259101-16, 2005, p. 45.]Search in Google Scholar
[Spranger, T., Hettelingh, J.-P., Slootweg, J., Posch, M. Modelling and mapping long-term risks due to reactive nitrogen effects: An overview of LRTAP convention activities. Environmental Pollution, 2008, N 154, p. 482-487.10.1016/j.envpol.2007.10.03518068283]Search in Google Scholar
[Centrālā Statistikas pārvalde. [Accessed 01.11.2011.] Available: http://www.csd.gov.lv]Search in Google Scholar
[Baranovs, H. National CORINE Land Cover in Latvia. The final report. Latvian Environment agency, 2000, p. 47.]Search in Google Scholar