The mower-conditioner windrower implement for various crops has a tubular structure (1), practically with the shape of a lying U, that is supported on front wheels (6A) and (6B), and forms means for mounting all the implement assemblies, starting with openers (7) with integrated vertical cutting assemblies (8) which are mounted in front of each front wheel (6A), the opening assemblies (7) opening the way and separating the plants to be mowed from lateral rows that are not mowed or that are beyond the width of the machine, while vertical cutting trims branches that might create a barrier, by trimming the plants vertically； a harvesting and lifting assembly (9) that extends across the full width of the implement, between the front wheels (6A), for selecting a row of plants corresponding to the width of the machine, for moving the plants inwards and upwards at the same time as they are mowed； a floating mowing assembly (11) which is also mounted transversely across the full width of the machine, directly after the front wheel (6A) and the harvesting/lifting assembly (9), forming a transverse cutting line that is kept near the ground, and that throws the mowed plants towards the windrowing assembly (12).
