I would like to see how this would be if the horizon line were raised up about an inch higher. (Either by pointing camera lower or getting down lower for the shot). As it is you've cut your shot in half. The subject of your picture is the crops whereas the sky is just a complimentary element. By showing more of the field you place higher emphasis on it and therefore make the viewer KNOW that its the subject rather than having them visually debate which is the subject: sky or field. Intellectually they know what the subject is but you have to tell their eyes what to see.
I do like the colors you captured and the sky is quite nice and does actually work well here despite what I said above. More of the puddles in the foreground would tie this with the title a bit more.
In terms of it relativity to the challenge I like it a lot. Its creative and is sort of a "salt of the earth" approach. Really great idea!