TY JOUR TI OAT AND BARLEY GROAT MICROELEMENT ENRICHMENT KW oat groats KW barley groats KW ultrasonic KW microelements KW zinc KW enrichment JO Bulletin of KSAU AU Yanova, M.A. AU Gusev, A.I. PY 2012 IS PB Krasnoyarsk State Agrarian University