Soybean contracts on the NCDEX were slightly up because of lower arrivals in the spot market and tracking gains in bellwether contracts on the CBOT. The most-active June contract on the NCDEX was up 12 rupees. Arrivals of soybean in Madhya Pradesh, the key market for the oilseed were down. Soybean in Indore, the benchmark market for the oilseed, it was selling at 3,750 rupees per 100 kg, up 5-10 rupees from previous day.