 I don't know why they're doing that. The John Deere world's largest seller of tractors and crop harvesters have announced another wave of layoffs. They did this on Friday, telling about 610 production staff at plants in Illinois and Iowa that they'll be out of a job by the end of the summer. The company is slashing about 280 workers from the plant in East Moline, Illinois, while another 230 employees are being let go at a factory in Davenport, Iowa.