The most-active July contract of castor seed on NCDEX hit a six-week high of 4,033 rupees per 100 kg, tracking gains in Jaipur. On NCDEX, the July contract was at 4,021 rupees per 100 kg, up 1%. Mustard seed prices rose in Jaipur, the benchmark market, due to a fall in arrivals and a rise in demand from domestic oil millers and crushers. In Jaipur, prices of the oilseed rose 15-20 rupees to 4,120-4,150 rupees per 100 kg. Arrivals of mustard seed in Rajasthan fell 25,000 bags (1 bag = 85 kg) to 100,000 bags.