A b s t r a c t. The experiment was conducted in 2016 and 2017 in the vegetation hall of the Faculty of Environmental and Agricultural Development, West Pomeranian University of Technology in Szczecin.The main goal of the study was to assess the influence of the biological preparation of effective microorganisms (EM), mineral and natural fertilization on: the yield of buckwheat (Fagopyrum Mill.) and millet (Panicum miliaceum L.), the SPAD index (leaf greenness index), the content of macro-and microelements in grain (N,