Futures contracts of soybean fell on CBOT due to the recent favourable rains in key growing areas in the US, the world largest grower. Rains help in growth of the plant and may boost the yield of the crop. Forecast of favourable weather in the coming days also weighed on sentiment. The most-active August contract in electronic trade on CBOT traded at $9.8300 per bushel, down 0.6% from the previous close.