You probably won't need lime there either. Ashes are usually on the basic side. In fact, I empty my wood ash from our fireplace on our garden and food plots. (wood ashes have been used to make soap ages ago because of its lye content.) My son has horses and the two grasses he does not feed or plant for forage is Fescue and clover. Fescue carries a fungus that can kill a horse. (He still doesn't trust the new fungus free variety). The clover he tells me causes the horses to sweat heavily like when he goes on trail rides. I guess the age of the material on the old railroad bed could have caused the PH to drop. You will know when you have it tested.

Russ