as your first conversion, very impressive.
I would however say it's a little overdone. By 'a little' I mean a lot.
This is a good photograph, and a strong final image, however it all looks very much overdone and very unrealistic. I would be interested in seeing the original version. The mud, the sky, none of it looks real or balanced. There is no progression between the tones and therefor no cohesion overall - I can tell you've done curves on the sky separately to the ground and that the tree has been blacked out on it's own. It is three separate elements that make up one photo but none seem to stick together. I'm distracted by the mud, and overwhelmed by the sky - pick one subject to focus on. I think your main subject should be the tree, the ground leads up to it but because of the processing it detracts form it too.
Now I know I've already felt the wrath on other occasions (or been ignored which is even worse) by going against the grain of people saying how much they love an image, but I hope this kind of make sense and is considered constructive.