TY JOUR TI ZhUSS MICROFERTILIZER AS A RESULT OF CONVERGENT KNOWLEDGE KW chelated micronutrient fertilizers KW ZhUSS KW multifunctional mechanism KW action and aftereffect JO Vestnik of Kazan State Agrarian University AU Pahomova, V.M. AU Daminova, N.I. PY 2020 IS 14 PB Kazan state agrarian University