The present invention relates to a process for the production of strips of the marking with the aid of at least two drills (1, 2, 3) in the same time in a field in which each distributor (1, 2, 3) has a control box (4) and several rows (5) which can be activated to the sowing respectively deactivated in order to obtain traces (6), without the seeds, which will be used as a flow path for a processing apparatus (7) in the operations of post - treatment, each control box (4) comprises a software program which determines, as a function of the parameters of operation, a program of automatic operation, making it possible to activate or deactivate at least one of the rows (5) of one of the drills (1, 2, 3).
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