TY JOUR TI Study of the use of various humic preparations on crops and the quality of grain feed barley KW humic preparations KW seed treatment KW plant spraying KW productivity KW root rot KW spring barley JO Agrobiotechnologies and digital farming AU Medvedev, N.A. AU Safin, R.I. PY 2024 IS 3 PB Kazan state agrarian University