TY JOUR TI THE MOBILE SOIL CHANNEL USE EFFICIENCY WHEN CONDUCTING THE LABORATORY RESEARCH KW closing-up bodies KW disks KW rollers KW laboratory installation KW soil channel KW mobile installation KW research KW labor input KW economic efficiency KW annual economic effect JO Bulletin of KSAU AU Yemelyanov, P.A. AU Sibiryov, A.V. AU Aksenov, A.G. PY 2013 IS PB Krasnoyarsk State Agrarian University