CPV code 03221120 designates Tuber vegetables in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
03221120 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 03221100 (Root and tuber vegetables).