High profitability and a wide range of uses are the marks of the Kemper’s tractor-mounted choppers. Many thin-stemmed crops for animal feed or the production of bio gas can be harvested, even under very difficult harvesting conditions. A row-independent harvesting system with fast-running rotors allows uninterrupted cutting over the full working width. The cutting rotors, with exchangeable segments and special scrapers, provide the conditions for the best possible harvest.