TY JOUR TI THEORETICAL JUSTIFICATION OF THE SEEDS MOVEMENT ALONG THE RECEPTION TRAY OF THE EXPERIMENTAL SELECTIVE PNEUMATIC SEEDING MACHINE KW seeds KW seeding machine KW tray KW device KW selective KW coil and pin KW sowing JO Bulletin Samara State Agricultural Academy AU Petrov, A.M. AU Syrkin, V.A. PY 2018 IS 3 PB Samara State Agricultural Academy