Method of continuously harvesting, chopping and parameter measuring for silage plants, comprising two successive plots designated A and B, plot A being harvested before plot B, comprising (a) harvesting and chopping plants from a plot, collecting all or part of the crop of the plot in a waiting bin, (b) transferring this crop from the waiting bin to a measuring bin, (c) determining silage parameter during the stay in the measuring bin, and (d) withdrawing crop from measuring bin, wherein step (a) for plot B occurs during step (c) for plot A, and step (b) for plot B is performed after steps (c) and (d) for plot A. Silage harvester comprising a silage collecting unit having a waiting bin (2) and a measuring bin (7), waiting bin's exit being placed in communication with measuring bin's entry, bin's exit having monitored means allowing to close or open said exit, parameter measuring sensor allowing parameter determination in the measuring bin, electronic processing means recovering parameters and controlling open
