Practical test: Krone BiG X 500 forage harvester Bizarre, isn’t it – that Krone should classify its 500hp BiG X 500 as its ‘entry’ self-propelled forager when not so long ago most of the other manufacturers would have specced their flagship machines with this level of motor muscle? Here we report on profi experiences with a prototype Krone BiG X babe, chomping through both maize and a light crop of second-cut of grass