Is there a way of neutralizing the effects of Juglone in soil. I have several Black walnut trees in my yard and cant seem to get anything else to grow (grass or veggies). I hate to take down a living tree, but this has been very frustrating!

Some plants are very tolerant and other very susceptible. Several university sites have list. Unfortunately, they aren't complete but still helpful. If you have many mature trees, the shade and competition from the roots could be a problem even with resistant plants. I would seriously consider removing one tree at least. I like diversity. The Juglone in the roots will still be a problem for a while.

I am also blessed/cursed with black walnuts.

Here is a great thread to take a look at from a while ago:
Need help with Black Walnut juglone at my new house!

I have quite a few walnuts, and I have decided to work with them instead of against them. Walnuts are quite tasty after all

That's very interesting information about the juglone not being quite as bad as some people think. I've got young walnuts within about 40' or 50'feet of my best young apple, so I'm hoping that will be enough. I did plant a redbud in between to block the roots.