I'm going to speculate on what I see, maybe Deere John can help me out. The implement on the front looks to be a scoop to dig a root ball, and I expect after the tree is dug it is tilted on its side with the top away from the front of the machine. If I had better pictures, I might see some sort of rail that allows the scoop to be withdrawn under the machine cradling the tree there for transport from the field.
equipment fan, a forwarder moves cut trees, this machine looks to be set up for moving live ones.