We've got a lot of native Black Walnut (Juglans nigra) trees around our place.
A couple hang over the path to the chicken coop. I've started wondering if I should be wearing a hardhat when I let the chickens out in the morning.
I'm not that wild about the taste of walnuts, so I haven't shelled many of them. It's easy to get the husks off - you run over them with your car. If you're driving down a rural road and see a line of black stuff in a gravel driveway, you know that person has walnuts.
But getting the meat out of the shell is a different matter. Not easy at all. Someone told me there was a specific type of cracker that would get the nut out cleanly, but I've never seen one.
There are a lot of things you can't plant near walnut trees, due to the toxic juglone that their roots produce. I guess they don't like a lot of competition.