NDVI analysis shows about chlorophyll content of the leaves. Lower NDVI values can be occurred due to lack of chlorophyll. Loss of chlorophyll content may be due to nitrogen deficiency in soil and also disease attack. How can we differentiate these two reasons using NDVI?
Hi Kavinda Perera,
it was a great question, just wanted to correct a word here, lower NDVI simply indicates the poor health of the vegetation depending on the reflectance, and not "lack of chlorophyll", for example some areas with grass also show lower NDVI when compared to trees. Lower NDVI levels can obviously as you mentioned be due to different reasons and it is extremely difficult to point out one typical cause. I would recommend having a correlation with NDVI levels over time and if you can access data on N levels on soil or pathogen attack, and compare with NDVI, it might give you a clearer picture.
Hope this helps,
Regards
Sanjana
I guess you may do it by calibration of your device on plants free of disease and plants free of N deficiency separately. I hope you get corrections good enough.
Best regards.@
