TY JOUR TI WORKING SURFACE RATIONAL PARAMETERS OF THE «EXTRA» SEED FLAT KICKER OF THE PNEUMATIC AND VACUUM SOWING DEVICE KW tilled crops KW sowing device KW «extra» seed kicker KW boss working surface KW experiment JO Bulletin of KSAU AU Yakovets, A.V. AU Nesmiyan, A.Y. PY 2012 IS PB Krasnoyarsk State Agrarian University