Chicken manure is pretty rich. Some call it hot because it sort of burns the
roots of young seedlings. If you don't wait, that is the potential risk. You might want to broadfork it and then plant a cover crop of oats to sort of neutralize it into a mellower form. It might be fine, depending on how much manure is in place, but grasses seem to be able to handle it regardless.
One thing that you could do is rake up the area to get the concentrated manure and some of the thatch and debris left-overs from the area, put that in your compost (where you gain the nutrients from the manure and nutralize it into an even more beneficial form), while putting other compost back on the
land to broadfork in and plant into. Then you can plant anything, I'd think.
"Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has."-Margaret Mead "The only thing worse than being blind, is having sight but no vision."-Helen Keller
