TY JOUR TI USE OF GROWTH STIMULATORS AND HUMIC SUBSTANCES IN THE PRIMARY SEED PRODUCTION LINK OF BARLEY OF ZNATNYY VARIETY WHEN SOWING IN ONE SPEECH KW barley (Hordeum vulgare L.) KW variety KW ear sowing KW primary seed production KW biometric indicators KW yield of quality seeds KW productivity KW profitability JO Vestnik of Kazan State Agrarian University AU Levakova, O.V. PY 2025 IS 20 PB Kazan state agrarian University