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This study included growth and needle analysis in ash-fertilized spruce and pine stands near Oulu (65 °N, 26 °E). Most of these stands, totalling 770 measured trees, were on peat and fertilized in wintertime 1980 and 1981 as practical work with 40 m3/ha. By 1985 there was a clear increment of growth, especially in spruce stands, probably due to the great amount of phosphorus (375 kg/ha) applied.
Keywords: peatland forestry, tree growth, ash-fertilization, phosphorus.
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Silfverberg,
Department of Peatland Forestry, The Finnish Forest Research Institute, Unioninkatu 40 A, 00170 Helsinki, Finland
Sähköposti:
ei.tietoa@nn.oo
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Issakainen,
Sähköposti:
ei.tietoa@nn.oo