Widely varying weed densities that had been desiccated by freezing did not reduce combine efficiency (gathering plus threshing losses) in harvesting corn (Zea mays L., var. Nebraska 508), sorghum [Sorghum bicolor (L.) Moench, var. RS 610], or soybeans (Glycine max L., var. Ford). Average combine gathering losses with corn, sorghum, and soybeans were 2, 7, and 16%, respectively. Average threshing losses with the combine were less than 1% with corn and sorghum and less than 3% with soybeans. The high gathering losses in this study were due partly to delayed combining to allow the weeds to be desiccated by freezing temperatures.