Beenthere, I've planted 60,000 trees over 16 years. All kinds, deciduous and conifers. I over planted but they all survive some places, all die other places. If allowed to grow tall when crowded, anyone tree has a small root system and if thinned out then, the wind gets down in them and topples all of them.
I figue I have several thousand to nip off anywhere from 1" to 4-5 ". I started using a chainsaw. Let me tell you all that kneeling and stooping got old fast /forums/images/graemlins/frown.gif Also the chain was dull after one tree since I don't want stumps sticking up. Some stumps like ash I'll have to paint with Round-Up. I was thinking of adding an electric run sprayer to give a stump a shot but I'm worried about dragging Round-Up around on the snipper /forums/images/graemlins/confused.gif