Struktura grubości wybranych drzewostanów sosnowych wzrastających na zrekultywowanych dla leśnictwa obiektach pogórniczych

The paper presents the results of the research on tree diameter structure in Scots pine (Pinus sylvestris L.) stands growing on mine dumps and pits reclaimed for forestry. The diameter structure of stands was characterised using statistical concentration and dispersion measures and compared with five theoretical distributions: beta, gamma, logarithmic−normal, normal and Weibull's. The studies were conducted in eight pine stands in age classes I (below 20) and II (21−40) age classes growing on the rehabilitated areas of the Bełchatów, Piaseczno, Szczakowa and Smolnica mines.