Soybeans ended the Monday trading session lower despite a 218,000 metric ton soybean sale announced Monday morning to unknown destinations. DTN says the weather forecast looks generally good for a lot of soybean combining to happen in the next 10 days or so. Argentine export logistics were off balance Monday because of a one-day port workers strike that began Sunday night. The weekly crop progress report showed that soybean combining is five percentage points ahead of normal at 20 percent complete.