I could see this thing used with the combination of 3PH lift and with a hydraulic "curl" function potentially being very effective at popping small trees out of the ground. I can imagine moving forward over a small (maybe 2"-3" DBH) sweetgum, dropping this thing down with the "plows" pointed down, pulling forward a bit, then "curl" the "plows" with the hydraulics to get them down into the roots good, then lifting with the 3PH to pop the tree out. The major problem would be extra stubborn trees (sassafras, anyone?), then you'd just be stuck there if you couldn't back out of it.
BR