A method and system of operating a machine harvester that presents an improved solution for preventing clogging. There is provided simultaneous measurement of at least a parameter of a base-cutting set, of at least a parameter of a chopping assembly, and of a position of at least a floating roller of a conveyance system. Based on comparisons of the parameters measured and reference values, during a pre-defined time interval, it is possible to manage a propulsion speed of the machine harvester and to manage a rotation speed of cutting disks of the base-cutting set and of billet-cutting blades of the chopping assembly.