The invention concerns apparatuses (1) for distributing mixed fluid or bulk material on to agricultural productive surfaces (100) comprising a distribution device (5) which has at least one fluid inlet (3) which can be connected to a mixed fluid supply and a plurality of outlets (7). The apparatus has a plurality of conduits (11) connected to the outlets, wherein the conduits (11) have a respective connecting portion (35b) for coupling to an application device (9), wherein an outlet (7) and the conduit (11) connected to the fluid outlet define a respective flow path. In particular the apparatuses have a device (15) for blockage detection in individual ones of, a plurality of or all flow paths, that has a plurality of sensors (21), and an electronic evaluation unit (17) which is adapted to receive the measurement signals output by the sensors (21), compare them to each other and on the basis of signal deviations determined in that case to identify individual ones of or a plurality of flow paths as blocked.
