Rise in supply weighs on Jaipur mustard seed prices. Prices of mustard seed down in Jaipur, Rajasthan, due to a rise in arrivals amid subdued demand from domestic oil millers and crushers. Arrivals in Rajasthan were estimated at 60,000 bags (1 bag = 85 kg), up 10,000 bags. A decline in the acreage of the oilseed, however, cushioned the fall in prices.