India is one of the top producers of castor in the world. Experts expect a decline in the area under castor in the country as farmers are getting low returns on their crop. This will lead to global shortage of castor oil, as India contributes 95 per cent of its world supplies. In the first episode of the 'Field Notes' podcast, BusinessLine's TR Vivek and Subramani Ra Mancombu talk about the unique castor oil and how India will be impacted.