The first image has very little adjustment from what was seen, slight adjustments were for exposure and contrast. The image was taken later in the later on on a clear summer's day.
The second image was an attempt to make the landscape more barren. For this I reduced the exposure by about half a stop, and using the raw converter I moved the yellows slider from green to orange. This has resulted in the mid ground desaturating the greens and giving a more rusty look to the ground. The sky too was slightly adjusted to give a stronger colour as if the image was taken at a higher altitude.
The final image was an attempt to make the image look later in the day as if dusk has fallen. I reduced the exposure and adjusted the temperature to reflect a murkier tone.
I feel that overall the last image has worked least of all, it does look murky, but then it also looks poorly taken. I think that the middle image has work better as an interpretation of a more desolate environment.