The present invention concerns a method for producing marking strips using at least two seeders (1, 2, 3) moving simultaneously in a field in which one seeder is the head seeder (1) and at least one other seeder (2, 3) follows the head seeder (1), being laterally offset, each seeder (1, 2, 3) has a control housing (4) and a plurality of rows (5) that can be activated for sowing or deactivated to produce tracks (6) without seeds which will be used as a lane for a treatment apparatus (7) to travel along in post-treatment operations, each control housing (4) comprising a software programme defining, on the basis of fixed working parameters, an automatic operating programme for activating or deactivating at least one of the rows (5) of one of the seeders (1, 2, 3).
