%0 Article
%T The effect of large-scale nitrogen fertilization on growth and yield of mature Norway spruce stands in south-western Finland
%A Westman, Carl Johan
%A Leikola, Matti
%A Nummi, Tapio
%D 1985
%J Silva Fennica
%V 19
%N 4
%R doi:10.14214/sf.a15432
%U https://silvafennica.fi/article/5253
%X <p>A method for calculation of the effect of practical fertilization for economic evaluation is presented and discussed. 55 Norway spruce (<em>Picea abies</em> (L.) H. Karst.) dominated stands on <em>Oxalis-Myrtillus</em> type sites were surveyed five to eight years after fertilization with nitrogen (90-170 kg/ha). The relationships between the fertilization effect and various stand characteristics were discussed. Fertilization increased the growth of the stands on an average by 2.2 m<sup>3</sup>/ha/year. In total the increase of tree growth during the research period was 17.5 m3/ha. This corresponds to a yield of 525–659 FIM/ha.</p>
<p>The PDF includes a summary in English.</p>