Soybean futures slip on Monday reducing its first quarterly increase in a year amid concern that crop inspections may be disrupt by a possible shutdown of the U.S. government, while harvest prospect were boosted by favourable weather. Soybeans for delivery in November slipped 0.8% to $13.09 a bushel on the CBOT and were traded at $13.1075 as of 11:28 a.m. Singapore time.