Yeah, that's a great solution for hugel beds. I mulch the hell out of everything I do, but it's no help in this case. Just too much water pushing against freshly turned soil. If I'd dug the rows last fall and seeded with a cover crop, it wouldn't be a problem, but the soft soil just didn't have time to reintegrate. Lesson learned though, and I'm glad I learned it on this and not on a bigger, more permanent project.