TY JOUR TI SEEDLING PRODUCTION TECHNOLOGY IMPROVEMENT FOR VITICULTURE COVERING ZONE KW grapes KW formation KW intensification KW covering zone KW graviomorphological stimulation KW sleeve KW quality of planting material KW labor productivity KW efficiency. JO Bulletin of KSAU AU Seget, O.L. AU Aleynikova, G.Y. PY 2021 IS 0 PB Krasnoyarsk State Agrarian University