The stone picker machine shall be hooked to the fixed hitch of a tyred-type or tracked-type tractor, and is operated by means of the universal joint, linked to the 540-rpm Power-Take-Off ( P.T.O.), without the need of any super-speed-reducer. By means of a vibrating pick-up system, stones from 20 mm to 600 mm diameter can be easily collected, and it is thanks to this system that the maintenance of the stone collecting components is reduced to a very minimum. The stone collecting depth - 0 to 200 mm - is hydraulically regulated from the tractor, whereas the machine working speed can vary, according to the working depth and to the quantity and size of stones present in the ground. It is thanks to the vibrating pick-up system and to the mobile grid that even the last quantity of earth is returned back to the soil. According to the need, there are at disposal four grids of different size -20 - 30 - 55 or 80 mm.The ground is left nicely tilled, hoed and tidy, ready to be seeded or to be prepared for creating parks, gardens or sports fields. The STONE PICKERS TOMENZOLI has been designed for optimal stone collection efficiency in the least time possible, showing a higher profitability for the removal of stones from the ground, without having to face high manpower costs and reducing also the wear-and-tear costs for agricultural equipments used in stony grounds.