"The icing on the cake is that high mustard seed prices have elicited a massive supply side response from the farmers and they have planted an all-time high mustard crop in about 77.62 lakh hectares. This figure is higher by almost 30 per cent and has the potential of increasing domestic mustard oil availability by 8 to 10 lakh tonnes in coming year," he added. Cooking Oil Prices in India: Edible Oil Prices Down by Rs 8-10 Per Kg in Last 30 Days, May Fall Further, Says Industry.