The original: http://upload.pbase.com/image/116583564

Modifications -

Shifted midtone cyans to red, and blues to yellow a bit
Desaturated the yellow-greens (hay/grass, etc.) a fair amount
Selected all but sky and desaturated it just a hair more
Inverted the selection and brought the levels down on the sky about 4 points
Applied a little bit of gentle LCE and 0.5 radius USM