人们希望中耕甜菜时,在不损伤甜菜叶片的前提下,尽可能地接近甜菜。美国明尼苏达州穆尔海德的奥布雷和博兰托马斯解决了这一难题。他们采用两根直径为12.7mm的钢棒制成扶叶器,然后将扶叶器安装在左边的中耕机圆盘的前方,在中耕圆盘通过前将甜菜叶片缩拢起来,从而 People want to cultivate sugar beet, without prejudice to the beet leaves, be as close to the beet. Aubrey and Boland Thomas, Moorhead, Minnesota, solved the problem. They made the leaf lifter with two bars of 12.7 mm diameter, and then mounted the front deflector in front of the left cultivator disc, which folded the beet leaves before the tillage disc passed