TY JOUR TI POWER INPUT OPTIMIZATION IN AGRICULTURAL CROP SOWING TECHNOLOGY KW power inputs KW sowing quality KW agricultural crop KW production volume JO Bulletin of KSAU AU Shchitov, S.V. AU Tikhonchuk, P.V. AU Spiridanchuk, N.V. PY 2013 IS PB Krasnoyarsk State Agrarian University