You know what's interesting to me? The piece of wood has a clone of sorts up there in the sky on the left side of the photo, a very similar shaped cloud formation. I like it :)
Great sky, but the flash in the foreground really takes away from it. If the subject is meant to be the field, as the title suggests, you'd probably be better off with a little longer exposure and no flash.
I think you've used a flash and it's created an effect I don't like too much, since the grass that it illuminates is not particularly appealing. Hardly looks like a field of dreams...