I ran into so many challanges while building this project, like working with graphql subscription, tensorflowjs, gathering information about fertlizers, collecting the data to train the model for prediction. But I am able to solve all the challanges with the hep of some friends and lots of resources available on internet. One of the major challange is to download the tensorflow model, convert it to tensorflowjs and making it to work with the uploaded image. It almost take me two days to complete this feature. Awesome documentation by tensorflowjs team has helped me a lot to understand the details of the technology and use it to my advantage. Also working with grpahql subscription is some what challanging, but because it is very popular in open source community, so it is very easy to find out the relevant examples and use it.