TY BOOK TI Mineral elements in feed and methods for their analysis KW macronutrients KW trace elements KW feed KW methods of analysis AU Kosolapov, V.M. AU Chuykov, V.A. AU Khudyakova, K.K. AU Kosolapova, V.G. PY 2019 PB Federal Williams Research Center of Forage Production and Agroecology