4 Testing of soil using Nutrisens 

Nice demo. Few things you may clarify 1) how long does it take to test a soil sample from soil preparation to report downlaod 2) how strong the sensor holder is to withstand frequent changes of different sensors 3) feeding basic data for different farmers and different farmlands into the App is cumbersome for a farmer 4) completed test result radio buttons for may be filled in / checked to avoid confusion instead of just colour cahnge 5) testing person may be recommended to wear handgloves to avoid sensor contamination.

can we find out the soil organic carbon through any of the methods

Is it available to farmer right now ?if yes then how to buy it

How accurate is this???

how much this cost..