Q: Where can I find the best on-line documentation on the proper way to remove a willow tree?

A: I don't know of any website that can supply this information for you. Removing trees can be a complex process, and it is often very dangerous.

I recommend that you contact a professional in your area.

If you are interested in more information, I suggest you contact the International Society of Arboriculture at 217-355-9411 or visit their website.