Thats what I hate about yard trees (besides the nails). You need to haul away every darn twig!
At the cabin I try to fell them away from the lawn and cut the crown branches up nice and small and they kind of just sink into the leaves after a year or two.
I've been working on a row of willows about 1/2 mile long. lower end now has stacks of brush 6' high and 8' diameter about every 20 feet. He wanted them gone because they were falling into his field, so motivatged that I can drive through his crops. When I started I assumed (yes I know) that the farmer would at least burn the brush. Nope. Now he is stuck with it. County put in a new ordinance. No burning of pile bigger than 3x3x3.
Harry K