EN
Austrian pine (Pinus nigra Arn.), a species introduced into Polish forests, underwent dendroclimato- logical research using the response function method. The researchers analised the annual width increment against the climatic conditions of three populations of trees from the Nizina Wielkopolska and the Jura Krakowska. It was determined that among factors affecting the process of xylene cell formation in the analised trees, thermal and pluvial conditions had a relatively largeimpact. It is expressed in the coefficient of determination (R2) which had the following values: 44, 48 and 50%.