TY JOUR TI THE CONNECTION BETWEEN THE VEGETATIVE INDEX NDVI AND THE CHLOROPHYLL CONTENT IN PLANTS OF WINTER WHEAT KW vegetative index KW NDVI KW winter wheat KW chlorophyll KW photosynthetic productivity KW grain yield JO Agrarian Bulletin of the AU EROShENKO, F.V. AU STORCHAK, I.G. AU Shestakova, E.O. PY 2018 IS 171 PB Ural State Agrarian University