first, I've merged the field with the sky. Used the blending options and the erase tool, so that to make the look real.
step 2 of 4
worked a little on the color scheme, added the tractor, after I've cropped it with magnetic crop tool. Added also a little reflection of the tractor on the water surface, and also a reflection of the clouds. Kept the shadows on tractor as in the original image.
step 3 of 4
I felt that the image was too simple and without a message. as a result I added the tree, on the left side and I've decided to continue with the field so that to enlarge the image. I liked a lot the image with the floaded field and thought that it will suit perfect to the image.
step 4 of 4
in the end, felt that the image was too warm, in which the colors are concerned and I've wanted to make it look real. Thought that this last version of color will suit the best.