Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

Abstract The subject of research was pine bark (Pinus silvestris L.) (at age 17-45 years) and soil from several forest sections of the Moracz Forest District. Both in bark and in soil different contents of organochlorine pesticides were found. Among HCH izomers, ?-HCH (lindan) was distinguished by the highest contents in all samples collection sites. Its maximum level in bark (60.1ą80.6 ľgˇkg-1 d.m.) was observed in the surroundings of Przybiernów village (section 617), while in soil – 8.2ą4.9 ľgˇkg-1 d.m., in former Przybiernów state-owned farmlands. In the bark of pines growing on the border of farmlands of Przybiernów village the most of ?HCH residues was stated (156.8 ľgˇkg-1 d.m.), instead in the soil near Moracz village – 9.6 ľgˇkg-1 d.m. and in the surroundings of the Rokita railway station – 10.4 ľgˇkg-1 d.m. The most of ?DDT residues were found in the surroundings of the Moracz village, where the maximum contents in the soil – 159.5 ľgˇkg-1 d.m. and in the pine bark – 252.2 ľgˇkg-1 d.m. were stated. Within the whole examined area, both in bark and in soil, the greatest percentage participation among izomers and DDT metabolites obtained pp-DDT (over 40%).