Abstract: A rotation control system for the mattock (2) of a tuft-building forest mattock, whereby rotation of the mattock is adapted to be braked or stopped stepwise in a manner that each pick (3) in turn works a whole in the first stage, in the second stage the pick (3) of the mattock removes surface deposit from between the obtained hole and a tuft to be built, and in the third stage, as mattock (2) is allowed to rotate freely, pick (3) leaves the loosened earth behind as a tuft. In order to make the sticking angle and depth dictated by the start moment of braking stages readily adjustable according to various qualities of soil, at a certain angle of rotation of the mattock a first impulse sensor actuates a first delay timer (6), adapted after a settable delay time to turn on a brake (11) for setting out the first stage of the mattock (2).