An apparatus (100) is described for precision volumetric metering and distribution of solid inputs used in agriculture the apparatus being coupled to sowing devices and comprising a frame (1) with a through-hole (12) through which an axle (3) radially locked to a turbine (4) extends the axle (3) driving the metering turbine (4) an opening (21) in the floor of the frame leads the agricultural input (31) to the output nozzle (13). The geometry of the turbine (4) comprises cutouts of various shapes which form chambers (5) for distributing the agricultural input (31) uniformly. A labyrinth (25) is formed by the frame (1) the inner grater (6) and the turbine (4). The structural geometry of the turbine (4) only allows metering of the input (31) while the turbine is rotating while the agricultural input (31) is retained inside and on the turbine (4) when the turbine does not rotate.
