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  • related to topography as well as to the type of cultivation since the beginnings of collectivization.
  • : reconstruction of the initial volcanic surface; identification of the postvolcanic processes remodelling the initial volcanic landforms; evaluation of the degree of remodelling based on the relevant properties of present-day basalt topography.
  • between individual factors : geological structure, rocks, slope type and exposure, early Pleistocene topography, climatic conditions and percentage vegetation cover. Under identical conditions it was found that there is a striking regional asymmetry