John Deere 4520 with different set of tracks. This is the reason it has tracks. He uses it to knock the berries off the vines to harvest them.
Other interesting videos from the canberry harvest:
Yanmar T80 Crawler Tractor Knocking off Cranberries Our cranberry harvest 2014.
Flooding the beds with our well and irrigation. Then knocking the berries off the vines with the beater tractor. Next will be adding more water to the beds to float them to one side.Corralling the berries to one side of the beds to pick them up. Then loading them into the semi trailer.