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The aim of this study was to analyse the concentrations of selected elements, such as copper (Cu), manganese (Mn), calcium (Ca), magnesium (Mg), iron (Fe) and zinc (Zn), in the hair of cattle from farms in areas with varying degrees of environmental contamination. The studies were performed on 116 Holstein-Friesian heifers, two years old and weighing around 550 kg. Animals originated from three breeding...
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