Variability of normalized vegetative indices in sugar beet
2019
Turan, Jan | Višacki, Vladimir | Oparnica, Stanko | Sedlar, Aleksandar | Pavol, Findura | Burg, Patrik
Crops vary, even in the same field. Precision agricultural technology enables better identification, analysis and management of temporal and spatial variability in the field. Precision is for the purpose of reducing this variability through more focused and targeted efforts -efforts that should increase production by maintaining the quality and quantity of the crop. When it comes to remote sensors in precision agriculture, sensors about vegetation indices are immediately referred to. Vegetation or vegetative index is calculated using different spectral ranges obtained by multispectral cameras on satellites or aircraft. The average values of vegetative indices from the test field of sugar beet crop are given in the paper. The normalized differential vegetative index represents the general condition of the plant and does not provide any specific information on the crop. Other used Green normalized vegetative indices inform the user of the intensity of the plant color since the green spectrum of light is used in the calculation. The last calculated NDVIre index uses in the calculation the red edge part of the light spectrum which is important during the growth and development of light. The NDVIre ranges from 0.75 to 0.9, the gNDVI ranges from 0.7 to 0.78 while the NDVIre ranges from 0.6 to 0.68.
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