The -holaras- haulm topper series is available in 3 models: UM 150, UM 180 and UM 210. Mechanical removal of haulms saves labour when topping and harvesting onions. Topping and harvesting in one pass has proven to be the most efficient approach. The stable and sturdy model UM 150 is suitable for 3-point linkage. All -holaras- onion haulm toppers have two wheels. Ground contacts and sensors ensure automatic (electro-hydraulic) height adjustment, ranging from maximum (coarse) to minimum (fine). The three blade rotors are PTO-driven using a robust gearbox and V-belts.