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The climatic drought indices are used for evaluation of drought conditions, but also vegetation indices derived from remote sensing images reflect the impact of drought on vegetation vigor. The aim of the study was to confirm suitability of normalized difference vegetation index (NDVI) as a tool for drought assessment in conditions of Slovakia. Verification of the method was done by correlation analysis between monthly NDVI and Z-index during the main growing season (from April to October) in the period from 2000 ...