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Edward Krzywy
West Pomeranian University of Technology, Szczecin, Department of Soil Science, Grassland Management and Environmental Chemistry, Słowackiego 17, 71-434 Szczecin, Poland
Ewa Możdżer
West Pomeranian University of Technology, Szczecin, Department of Soil Science, Grassland Management and Environmental Chemistry, Słowackiego 17, 71-434 Szczecin, Poland