A method for producing marking strips using at least two seeders moving simultaneously in a field in which one seeder is a head seeder and at least one other seeder follows the head seeder being laterally offset, each seeder includes a control unit and plural rows that can respectively be activated for sowing or deactivated to produce tracks without seeds which will be used as a circulation lane for a treating apparatus in post-treatment operations. Each control unit includes a software program defining, with regard to fixed working parameters, an automatic operating program for activating or deactivating at least one of the rows of one of the seeders.
