Plant Lodging
This trait indicates the probability that a plot has been affected by lodging. Lodging is the phenomenon by which the plant bends over the stems near ground level, which can have a dramatic impact on the yield. This trait is computed based on the plant height results through time.
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Plant Height
Max Plant Height: This trait refers to the max height recorded within the plot. It is computed using a 3D point cloud of the microplot and maximum is defined as the 99% percentile of the height of each point among plot point cloud. On request, we can compute Max Plant height only on a sub...
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Plant Height Heterogeneity
Max Plant Height Heterogeneity: This trait refers to the heterogeneity measured from the max plant height calculation. The plot studied is first sliced into ~30cm patches, the trait is processed per slice and we compute a coefficient of variation (standard deviation among slices divided by mean value of the plot). Mean Plant Height Heterogeneity: This trait...
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Organs Count Heterogeneity
This trait refers to the heterogeneity measured from the organ count. The plot studied is first sliced into ~30cm patches, the trait is processed per slice and we compute a coefficient of variation (standard deviation among slices divided by mean value of the plot)
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Plant Biovolume Heterogeneity
This trait refers to the heterogeneity measured from the biovolume calculation. The plot studied is first sliced into ~30cm patches, the trait is processed per slice and we compute a coefficient of variation (standard deviation among slices divided by mean value of the plot).
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Leaf Area Index
LAI represents the maximum projected leaf area per unit of ground surface area. It is generated by inverting the radiative transfer model PROSAIL. Leaves constitute the main part of the crop used for photosynthesis. Leaf area estimation is therefore a good proxy of yield. To be accurate, the model does not distinguished leaf and stems,...
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NDRE
The Normalized Difference Red-Edge Index is based on the red-edge band which is very sensitive to medium to high levels of chlorophyll content. Hence, it is a good indicator of crop health in the mid to late stage crops where the chlorophyll concentration is relatively higher. Also, the NDRE could be used to map the...
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NDVI
The Normalized Difference Vegetation Index is one of the most commonly used indices for monitoring the percentage of green cover in a projected surface. It takes as an input the reflectance dataset, specifically the Near Infra-Red (NIR) and Red bands. NDVI helps to monitor crop development throughout its growth cycle. It is computed as follows:...
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Simple Ratio
Simple Ratio is indeed the simplest vegetation index calculated by dividing reflectance recorded in the Near Infra-Red (NIR) by that recorded in Red bands. Hence, SR = ρ850 / ρ675. It is a quick way to distinguish green leaves from other objects in the scene and estimate the relative biomass present in the image. Also,...
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Flower Fraction Heterogeneity
This trait refers to the heterogeneity measured from Flower Fraction. The plot studied is first sliced into ~30cm patches, the trait is processed per slice and we compute a coefficient of variation (standard deviation among slices divided by mean value of the plot)
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Green Cover
Green Cover: This trait refers to the surface of green pixels within the plot. It is expressed as a percentage of vegetation pixels divided by all plot pixels. It is a good proxy of the vegetation development and the capacity of the plant to make photosynthesis. Green Cover can be influenced by weeds or strong...
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Green Cover Heterogeneity
This trait refers to the heterogeneity measured from the Green Cover calculation. The plot studied is first sliced into ~30cm patches, the trait is processed per slice and we compute a coefficient of variation (standard deviation among slices divided by mean value of the plot).
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Greenness
Greenness (excess green): This trait refers to the intensity of green within the vegetation mask identified from the Green Cover. Many indices are able to summarize the greenness, we propose three : vari / excess green and green on red. Greenness (excess green) Heterogeneity: This trait refers to the heterogeneity measured from the Greenness (excess...
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Plant Cover
Plant cover refers to the surface of plant pixels within the plot, including green pixels and yellow/brown pixels that might be related to senescence or disease symptoms. It is expressed as a percentage of all plot pixels. It is a good proxy of the vegetation development and the capacity of the plant to cover the...
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