A unit (UO) for the processing ground (T), comprises at least a first group (G1, D3) for supporting rotating cutting disk means (D) adapted to realize grooves (S) in said ground (T); at least a second group (G2) for supporting plowshare means (V, E) adapted to realize, in correspondence of said grooves (S), cuts (Z) below the surface of said ground (T); and mechanical coupling means (M2) for dynamically connecting said second group (G2) to said first group (G1, D3).