Big crops got bigger Wednesday when USDA updated its supply/demand report. The average national corn yield is forecast at 181.3 bushels per acre, up almost three bushels from the August report. The soybean crop estimate is record high at almost 4.7 billion bushels. There is a record average soybean yield projected at 52.8 bushels per acre. World ending stocks estimates increased for wheat, corn and soybeans.