4UQL-1600 self-loading stone picker should be matched with tractor in 120hp for working. It is good at working in mining land, debris blow impacting ground, water-logging farmland and building ground with high working efficiency.  The digging blade enters into soil to collect stones & soil and transfer them to the front chain row, then transfer them to the roller device in the back of the machine, and the soil will be drained by the turning roller device and the stones will be loaded truck by the conveying belt.