TY JOUR TI EFFECTIVE OPERATING MODE SUBSTANTIATION OF THE SEEDER VIBRATING DEVICE WHEN SOWING ROW-CROP CULTURE SEEDS KW vibrating device KW row-crops cultures KW parameter substantiation KW seeds KW sunflower KW seeders KW agricultural requirements KW interval KW fluctuations KW graphic dependences JO Bulletin of KSAU AU Vishnyakov, A.A. AU Vishnyakov, A.S. PY 2013 IS PB Krasnoyarsk State Agrarian University