Assessment of sodium and potassium levels in soil, feeds and hair of dairy cows in east-central Poland / Ocena poziomu sodu i potasu w glebie, paszach i sierści krów mlecznych z rejonu środkowo-wschodniej Polski
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Krzysztof Górski
Siedlce University of Natural Sciences and Humanities, Faculty of Natural Sciences, Department of Bioengineering and Animal Husbandry, B. Prusa 14 St., 08-110 Siedlce, Polnd
Leon Saba
University of Life Sciences in Lublin, Department of Biology and Animal Breeding, Akademicka 13 St., 20-950 Lublin, Poland