%0 Article
%T Content of sulphur and fluorine compounds in Scots pine needles as an indicator of air pollution in Poland.
%A Molski, Boguslaw
%A Bytnerowicz, Andrzej
%A Dmuchowski, Wojciech
%D 1981
%J Silva Fennica
%V 15
%N 4
%R doi:10.14214/sf.a15366
%U https://silvafennica.fi/article/5139
%X <p>Our preliminary findings indicate that the content of total sulphur and soluble fluorides in needles of the Scots pine (<em>Pinus sylvestris</em> L.) reflects the degree of air pollution with sulphur and fluorine compounds. A project for a map of air pollution in Poland, based on chemical analysis of Scots pine needles, is presented. Results of the total sulphur and soluble fluoride content in 2-year old needles from 15- to 25-year-old trees should yield a picture of air pollution with sulphur and fluorine compounds. The first stage will involve the preparation of a map of the area between the Warsaw and Plock agglomerations. This area will be divided into 10 squares with side dimension of 25 km each. Samples will be taken at 5 different sites in each square and also approximately every 5 km along a straight line between these towns.</p>