I have some old wheat straw in the barn. I don't think it has any seed heads still in it. I apologize ahead of time if this is a dumb question. How should I best use the straw? Mixed with the compost pile...for walkways between raised rows...layered between compost in raised rows...mulch? Does it even matter? I just didn't want to add something that would draw out nitrogen. I know I do want to save some straw for growing potatoes.