The first process performed by the combine harvester is reaping, which is cutting down the crop for harvesting. As the combine harvester drives through the field, the crop is pulled into the harvester in the front section, called the header. From there it is pushed further into the machine by a slowly turning wheel called the pickup reel, which also holds the plants for cutting. The crop is then cut by the cutter bar, which has teeth that are sometimes called mowing fingers. These cut off the plant at the bottom near the ground.