The invention relates to a measuring system (22) comprising a fixed housing (28) having an axially extending measuring edge (44) containing a seed measuring gap (46); a fixed, axially extending output edge (30) which is radially arranged outside the fixed housing and which comprises a seed output gap (42); and a rotating disc which is adjacently arranged in relation to the fixed housing (28) and which comprises an inner area (48) and an outer area (50). The inner area (48) is provided with seed pockets (54) for receiving individual seed corn in such a way that the measuring edge (44) prevents seeds from being radially released and the seed measuring gap (46) enables seeds to be radially released. The outer area (50) is provided with seed output openings (60) in such a way that the output edge (30) prevents seeds from being radially released and the seed output gap (42) enables seeds to be radially released. Each seed pocket (54) is respectively linked to a seed output opening (60) by means of a passage (56).
