A machine for working terrain, including burying rocks and stones comprising a main frame (1) which is destined to be fixed to a rear lift link of a tractor; a rotor (8) having radial blades (81) which is supported transversally to an advancement direction of the machine; means for activating the rotor (8) in an opposite direction to the advancement direction of the machine; a fixed grid (11) and an orientable wall (12) which are arranged in order downstream of the rotor (8) with respect to the advancement direction; a frame (15) which is posteriorly hinged to the main frame (1) and bears a levelling roller (18) which also determines a depth of working; and means for regulating a position of the hinged frame (15) with respect to the main frame (1), wherein the orientable wall (12) is hinged to the main frame (1) and is pushed against the ground for an initial tract by a weight of the orientable wall (12), and subsequently by elastic means acting between the orientable wall (12) and the hinged frame (15).
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