612700 Process of operation of an apparatus for the mechanized displacement of movable wires (F) from a first to a second height, the wires (F) being arranged on opposite sides of a row of plants, in particular grape vines. The process comprising the following steps of: a) arranging a frame (1) astride the row of plants so as to position means (14) for moving the movable wires (F) on opposite sides of the row b) connecting the movable wires (F) to a pair of gripping elements (15) provided on the moving means (14) and arranging the frame (1) in proximity of an intermediate pole of the row c) moving the gripping elements (15) to a prepositioning height through a sequential and synchronized displacement along at least one axis substantially orthogonal to the tilled ground in which the row is located d) arranging the movable wires (F) at the second height through a sequential and synchronized displacement of the gripping elements (15) along two axes, one substantially parallel to the tilled ground and the other perpendicular to the ground.
