What kind of equipment is needed for renovating an overgrown pasture. (overegrown with willow and alders) The brush is fairly mature, meaning big root masses. I have a neighbour with a tractor, but he has no implements other than an old brush hog, cuts about 1 1/2 diameter sticks. What should I beg borrow or buy that will pull out, break up or other wise deal with these root masses. The feild is about five acres.