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Haulm Topper Market - Competitive Insight, Trends, Forecast 2027 A haulm topper is an agricultural machine used to cut stems (haulms) of potato, beet root, sugar beet, carrot, and other cultivated root vegetables. The haulm topper is used to cut the haulms and separate the vegetable from the stems, which is subsequently collected by the harvester. Its operation is similar that of a flail mover (flail mover is used to cut big grass or plants that cannot be cut by a standard or an ordinary mover); however, it is more likely to be called potato drill. The haulm topper can be attached to a tractor, either to the front or rear end of the tractor. This machinery increases the efficiency of the plucking of potatoes and reduces human effort and time.