In the middle of the season,
the NDVI index helps to understand how plants grow and develop. If the index values are medium to high (0.5−0.85), most likely there are no major issues at this part of the field. If the index is low, probably there are specific issues, like a lack of moisture or nutrients. It is better to check this part of the field yourself.
Using the NDVI index, we create maps for variable-rate application of nitrogen
. We detect areas of low, medium and high vegetation indices, and then a farmer himself can define the rate of fertilizer required. In our experience, the optimal nitrogen application scheme is as follows