TY JOUR TI ESTIMATION OF STABILITY OF SPRING BARLEY VARIETIES (Hordeum vulgare L.) IN MODERN CLIMATIC CONDITIONS OF THE ARKHANGELSK REGION KW spring barley KW agro-climatic conditions KW adaptive properties of varieties KW yield KW stability index JO Adaptive Fodder Production AU Batakova, O.B. PY 2019 IS 2019 PB Federal Williams Research Center of Forage Production and Agroecology