This shot had much brighter colors in the foreground and on the tractor, and the sky was bright blue and sunny. I added the stormy sky from a shot I had taken the day before. To balance the light, I desaturated the reds in the tractor. I also created a new layer on top and airbrushed dark green in a pattern to somewhat reflect the tones in the clouds, but on the grassy foreground. I switched that layer to color burn blending mode and reduced its capacity to 15%.