Besides tractors, these include ploughs, harrows, drills, transplanters, cultivators, irrigation equipment, and harvesters. Rollers may be trailed after other equipment such as ploughs, disc harrows, or mowers. Seedbed preparation in farm fields often involves secondary tillage via harrows and cultivators. Other similar secondary tillage tine implements or rotary harrows are also widely used. Later multi-bottom plows, disks, iron harrows, drills, horse-drawn mowers and binders appeared. A variety of devices such as nets, harrows, sand rakes etc. One plough and two harrows is given to be shared among ten families. Lighter secondary disc harrows are primarily used to break down soil clods into smaller pieces. Unable to afford equipment for his tractor, he welded together two harrows for horses. The company has expanded its range to include products such as tractor-drawn harrows and rollers. Vehicles or mules dragged harrows along tracks to raise dust clouds, simulating other troop movements. The material is stirred by rotating sets of harrows. Scampton was equipped with Virginias and Harrows. These harrows move rapidly across the surface. Nine Harrows were also used by 782 Naval Air Squadron, Fleet Air Arm as transports.