I wouldn't be surprised if that pile didn't rot in your lifetime without some help. From my perspective, I'd rather do something else than "helping" wood rot with that many hours of my time. But if you enjoy the activity, that's a valid reason for doing it so go for it.
Maybe it would rot faster with some dirt on it? Ok, maybe rot in 25 years instead of 50? Depending on the circumstances, burying the wood can actually preserve it, not make it rot. How do you think old wooden artifacts are preserved (viking ships, 150 year old steamboat in Kansas, etc.). If you put dirt on it, make sure you have done your homework or you'll end up with a worse mess.
If it were me, I'd find a match.
Obed