The total of 1368 phytosociological surveys of grain and root crops was used to determine habitat conditions in soils belonging to different agricultural complexes according to the method of Ellenberg. The conditions prevailing in the soil-agricultural complexes result from effects of many factors, as indicated by different values for T, W, R, N, and G, for the individual complexes. In addition, internal variability of the above habitat conditions in the individual complexes, is affected by physiographic situation of the studied units.
Twelve physiographic regions, determined in Kraków province, were analysed using 1398 Braun- Blanquet phytosociological surveys of grain and root crops. The evaluation was made according to the Ellenberg method in which, weeds were considered to be indices of thermal (T), humidity (W), soil reaction (R), nitrogen content (N), and soil biological activity (G) conditions. The method proved to be useful to demonstrate differences between studied mesoregions.