BACKHUS A50 and A55 windrow turners are the pinnacle of compost turning technology. With a powerful large-diameter drum, these machines easily churn through compost, turning up to 4,700 and 5,200 cubic yards per hour, respectively. A wide arrangement of options are available, making these machines uniquely customized for your operation. Simply put, the BACKHUS machines are industry leaders in performance, fuel efficiency, flexibility and easy maintenance.