Acknowledgments

My research has been sponsored by SJFR, NFR, SNV, and the EC. This chapter has benefitted from my introduction to this area of research by C.-O. Tamm and many discussions with D. Binkley, R. Giesler, H. Grip, M. Hogberg, H.-O. Nohrstedt, and T. Nasholm. I thank E.-D. Schulze for the kind invitation to write this chapter.

References

Alexander, M. (1977) "Introduction to Soil Microbiology," 2nd ed. John Wiley, New York.

Aber, J. D., Nadelhoffer, K. J„ Steudler, P., and Melillo, J. (1989). Nitrogen saturation in northern forest ecosystems. Bioscience 39, 378-386.

Binkley, D. and Högberg, P. (1997). Does atmospheric deposition of nitrogen threaten Swedish forests? For. Ecol. Manage. 92,119-152.

Cajander, A. K. (1909). Über Waldtypen. Acta For. Fenn. 1, 1-175.

Cajander, A. K. (1926). The theory of forest types. Acta For. Fenn. 29(3), 1-108.

Chapin, F. S. III, Fetcher, N., Kielland, K., Everett, K. R„ and Linkins, A. E. (1988). Productivity and nutrient cycling of Alaskan tundra: Enhancement by flowing soil water. Ecology 69, 693 - 702.

Chapin, F. S. III, Moilanen, L„ and Kielland, K. (1993). Preferential use of organic nitrogen for growth by a non-mycorrhizal arctic sedge. Nature 361, 150-153.

Cole, C. V. and Heil, R. D. (1981). Phosphorus effects on terrestrial nitrogen cycling. Ecol. Bull. 33, 363-374.

Cronan, C. S. and Grigal, D. F. (1995). Use of calcium/aluminium ratios as indicators of stress in forest ecosystems. /. Environ. Qual. 24, 209-226.

Dahl, E„ Gjems, O., and Kjelland-Lund, J. Jr. (1967). On the vegetation of Norwegian conifer forest in relation to the chemical properties of the humus layer. Medd. Norsk Skogsforsoksv. 85, 501-531.

Dahl, E., Selmer-Anderssen, C., and Saether, R. (1961). Soil factors and the growth of Scotch pine: A statistical re-interpretation of data presented by Viro (1955). Soil Sei. 92, 367-371.

Degermark, C. (1985). "Climate and Chemistry of Water at Svartberget. Reference Measurements 1984." Vindeln Exp. For. Stat., Vindeln.

Degermark, C. (1987). "Climate and Chemistry of Water at Svartberget. Reference Measurements 1986." Vindeln Exp. For Stat., Vindeln.

Degermark, C. (1988). "Climate and Chemistry of Water at Svartberget. Reference measurements 1987." Vindeln Exp. For. Stat., Vindeln.

Degermark, C. (1989). "Climate and Chemistry of Water at Svartberget. Reference Measurements 1988." Vindeln Exp. For. Stat., Vindeln.

Derome, J., Kukkola, M„ and Mälkönen, E. (1986). "Forest Liming on Mineral Soils. Results from Finnish Experiments." Report 3084, Swedish Environmental Protection Agency, Solna.

Edfast, A.-B., Näsholm, T., and Ericsson, A. (1990). Free amino acid concentrations in needles of Norway spruce and Scots pine on different sites in areas with two levels of nitrogen deposition. Can. ]. For. Res. 20, 1132-1136.

Giesler, R„ Högberg, M„ and Högberg, P. (1998). Soil chemistry and plants in Fennoscandian boreal forest as exemplified by a local gradient. Ecology 79, 119-137.

Hägglund, B. and Lundmark, J.-E. (1977). Site index estimation by means of site properties. Scots pine and Norway spruce in Sweden. Stud. For. Suec. 138, 1-38.

Holloway, J. M„ Dahlgren, R. A., Hansen, B„ and Casey, W. H. (1998). Contribution of bedrock nitrogen to high nitrate concentrations in stream water. Nature 395, 785-788.

Holmgren, P. (1994). Topographic and geochemical influence on the forest site quality, with respect to Pinus sylvestris and Picea abies in Sweden. Scand. J. For. Res. 9, 75-82.

Htitterman, A. and Ulrich, B. (1984). Solid phase-solution-root interaction in soils subjected to acid deposition. Philos. Trans. R. Soc. London Ser.B 305, 352-368.

Hiittl, R. F. and Zöttl, H. W. (1993). Liming as a mitigation tool in Germany's declining forests — Reviewing results from former and recent trials. For. Ecol. Manage. 61, 325-338.

Ingestad, T. (1979). Mineral nutrient requirements of Pinus sylvcslris and Picai abies seedlings. Physiol. Plant. 45, 373-380.

Kreutzer, K. (1995). Effects of forest liming on soil processes. Plant Soil 168-169,447-470.

Lahti, T. and Vaisancn, R. A. (1987). Ecological gradients of boreal forests in South Finland: An ordination test of Cajander's forest type theory. Vegetatio 68, 145-156.

binder, S. (1995). Foliar analysis for detecting and correcting nutrient imbalances in Norway spruce. Ecol. Bull. 44, 178-190.

Lovblad, G„ Kindbom, K„ Grennfelt, P., Hultberg, H„ and Westling, O. (1995). Deposition of acidifying substances in Sweden. Ecol. Bull. 44, 17-34.

T.undell, Y. and Albrektsson, A. (1997). Downslope effects of clear-cutting in Sweden on diameter increment of Picca abies and Pinus sylvcslris. Scand.J. For. Res. 12, 241-247.

Mitchell, H. L. and Chandler, R. F. (1939). The nitrogen nutrition and growth of certain deciduous trees of northeastern United States. With a discussion of the principles and practice of leaf analysis as applied to forest trees. Black Rock For. Bull. 11, 1-94.

Nasholm, T„ Ekblad, A., Nordin, A., Giesler, G., Hogberg, M„ and Hog-berg, P. (1998). Boreal forest plants take up organic nitrogen. Nature 392, 914-916.

Nihlgard, B. (1985). The ammonium hypothesis—An additional explanation for the forest dieback in Europe. Antbio 14, 2-8.

Nohrstedt, H.-O. (1985). Nonsymbiotic nitrogen fixation in the topsoil of some forest stands in central Sweden. Can. J. For. Res. 15, 715-722.

Persson, T. and Wiren, A. (1996). Effekter av skogsmarkskalkning pa kvaveomsattningen. In "Skogsmarkskalkning." (II. Staaf, T. Persson, and U. Bcrtills, Eds.), pp. 70-91. Report 4559, Swedish Environmental Protection Agency, Stockholm.

Read, D. J. (1986). Non-nutritional effects of mycorrhizal infection. In "Physiological and Genetical Aspects of Mycorrhizae." (V. Gianinazzi-Pearson and S. Gianinazzi, Eds.), pp. 169-176. INRA, Paris.

Read, D. J. (1991). Mycorrhizas in ecosystems. Experientia 47, 376-391.

Reiners, W. A. (1981). Nitrogen cycling in relation to ecosystem succession. Ecol. Bull. 33, 507-528.

Rohde, A. (1987). "The Origin of Streamwater Traced by Oxygen-18". Doctoral thesis, University of Uppsala.

Sverdrup, H„ Warfvinge, P., and Rosen, K. (1992). A model for the impact of soil solution Ca:Al ratio, soil moisture, and temperature on tree base cation uptake. Water Air Soil Pollut. 61, 365-383.

Sverdrup, H., Warfvinge, P., and Nihlgard, B. (1994). Assessment of soil acidification effects on forest growth in Sweden. Water Air Soil Pollut.. 78, 1-36.

Tamm, C.-O. (1991). Nitrogen in terrestrial ecosystems. Ecol. Stud. 81, 1-115.

Tamm, C.-O., Holmen, H„ Popovic, B., and Wiklander, G. (1974). Leaching of plant nutrients from forest soils as a consequence of forestry operations. Amino 3, 211-221.

Viro, P. J. (1951). Nutrient status and fertility of forest soil. I. Pine stands. Metsiitiet. Tutkimuslait. Julk. 39,1-47.

Viro, P. J. (1955). Use of ethylendiaminetetraacetic acid in soil analysis. II. Determination of soil fertility. Soil Sci. 80, 69-74.

Vitousek, P. M. and Howarth, R. W. (1991). Nitrogen limitation on land and in the sea: How can it occur? Biogeochemistry. 87-115.

Wiklander, G. (1981) Clear-cutting and the nitrogen cycle. Heterogenous nitrogen leaching after clear-cutting. Ecol. Bull. 33, 642-647.

Zackrisson, O. (1977). Influence of forest fires on the north Swedish boreal forest. Oikos 29, 22-32.

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