Dry boards question...

I was reading on the wiki about dry boards. It says that if placed next to any other item, (except tilled fields), that they will become moldy boards instead.
My lumber pile is next to a tilled field and also close to a coal clamp. Will that turn them moldy as well? I just placed the pile so if I remove the coal will that help?
My lumber pile is next to a tilled field and also close to a coal clamp. Will that turn them moldy as well? I just placed the pile so if I remove the coal will that help?