Agricultural machine, which is self-propelled or in the form of a hitchable trailer, for the transport and distribution of a bulk product, in particular intended for animal feeding, the said machine comprising a tank or similar container, which is mounted on a rolling chassis with at least one sealable opening situated substantially close to or at the level of the bottom of the tank and is fitted with at least one mobile element (6, 6') performing scraping of the said bottom and promoting product ejection through the said at least one opening, the or each mobile scraping and ejection element (6, 6') being an element rotary mounted around a vertical shaft or axis, perpendicular relative to the plane of the bottom and comprising at least two separate radial arms (8, 8', 8", 8′′′), distributed around the axis and sweeping over, where appropriate in cooperation with the arms (8, 8', 8", 8′′′) of at least one other element (6, 6'), substantially the entire surface of the bottom, the thickness or the height (h) of each arm (8, 8', 8", 8′′′) relative to the bottom being less than the height (h') of the side opening or of each side opening extending from the bottom and in front of which the arm (8, 8', 8", 8′′′) in question passes during the rotation of the mobile element (6, 6') concerned, the agricultural machine is characterized in that each mobile element (6, 6') comprises at least three, preferably four, elongated arms (8, 8', 8", 8′′′), mutually spaced apart from each other and independent, and distributed in angularly equidistant manner around the axis or the shaft of the said element (6, 6'), in that each arm (8, 8', 8", 8′′′) has a section with decreases continuously or in steps, from its proximal end of the shaft, to which it is connected, to its free distal end, and in that the height (h) of an arm decreases according to the centrifugal direction, its value being nevertheless always less than the height (h') of the associated opening, at least in its end region. the or each mobile scraping and ejection element (6, 6') being an element rotary mounted around a vertical shaft or axis, perpendicular relative to the plane of the bottom and comprising at least two separate radial arms (8, 8', 8", 8′′′), distributed around the axis and sweeping over, where appropriate in cooperation with the arms (8, 8', 8", 8′′′) of at least one other element (6, 6'), substantially the entire surface of the bottom, the thickness or the height (h) of each arm (8, 8', 8", 8′′′) relative to the bottom being less than the height (h') of the side opening or of each side opening extending from the bottom and in front of which the arm (8, 8', 8", 8′′′) in question passes during the rotation of the mobile element (6, 6') concerned, the agricultural machine is characterized in that each mobile element (6, 6') comprises at least three, preferably four, elongated arms (8, 8', 8", 8′′′), mutually spaced apart from each other and independent, and distributed in angularly equidistant manner around the axis or the shaft of the said element (6, 6'), in that each arm (8, 8', 8", 8′′′) has a section with decreases continuously or in steps, from its proximal end of the shaft, to which it is connected, to its free distal end, and in that the height (h) of an arm decreases according to the centrifugal direction, its value being nevertheless always less than the height (h') of the associated opening, at least in its end region.