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The aim of study was to evaluate the chemical composition, including mineral content, in milk of different breeds maintained in organic and traditional farms using intensive (PMR) and traditional feeding systems. The study was carried out on 47 farms in south-eastern Poland. A total of 735 milk samples were analysed, including 263 from cows raised on organic farms, 218 from cows raised on conventional...
The objective of the present researches was to evaluate the effect of the varied percentage of zinc and copper protein chelate in a dietary unit on the chosen haematological, biochemical and productive parameters of cows. The experimental factor was the kind of zinc and copper compound in a supplementary mixture where 25% or 50% of zinc and copper in the form of sulfates was replaced with organic...
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