Department of Ecology;
Faculty of Humanities and Natural Sciences;
Presov University in Presov;
Presov;
Slovak Republic;
Centre of Excellence for Animal and Human Ecology;
Presov University in Presov;
Presov;
Slovak Republic;
Faculty of Natural Science;
Institute of Chemistry;
Comenius University in Bratislava;
Bratislava;
Slovak Republic;
Environmental Factors; Equisetum arvense L.; Statistical Variability; Silicon;