I am analysing sugar cane crops with QGIS and need to estimate the soil carbon content to evaluate the nutrition status of the crops. The problem is that I don't have ground data so there is no possibility of doing any calibration. The only available data that I have is the shapefile with all the crops mapped as polygons and the NDVI and NDMI calculated previously. I am wondering whether I can get this info through Remote Sensing (by using either Sentinel-1 SAR data or Sentinel-2).

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    Please be more specific when asking a question, we neither know your available assets, nor which software you're using, nor which data you have, etc. – Erik Nov 1 '19 at 13:41
  • Is soil nutrition just based on carbon content of the soil? Won't you also need to know underlying geology? – nmtoken Nov 7 '19 at 9:48

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