Abbreviation for "Normalized Differenced Vegetation Index" or "Normalized Density Vegetation Index" (in German "normalized differentiated vegetation index"). It is the most frequently used vegetation index in agriculture and viticulture and is calculated on the basis of satellite image data (remote sensing). Vegetation indices are one of the primary sources for observation and analysis of the Earth's surface. The NDVI is calculated on the basis of the intensity of the reflected light in the red and near infrared spectral range, which is recorded by satellites. The index is based on the fact that healthy vegetation reflects relatively little radiation in the visible spectral range and relatively much radiation in the following near infrared range. In contrast, other surface materials, such as soil, rocks, bodies of water or even dead vegetation, show no such distinguishing difference.
In viticulture thus the vigor, the condition of the deciduous roof and also the fruit quality can be determined and derived accordingly necessary Deciduous care measures
be performed. The optimal time for a measurement in viticulture is the veraison
(Maturity onset). As a rule, there are dependent on the soil type
and the topography
a very large fluctuation in the earnings
, The different conditions of a large vineyard area are reflected in the division into blocks, sub-blocks and zones according to NDVI measurement results. These are then not uniform, but in the context of precision viticulture