There is much to admire about this picture but some of these qualities are hidden due to the picture's underexposure. I have taken the liberty of making my own adjustments. Here's what I did in Photoshop:
Firstly I adjusted the levels to suit the land part of the photo. I slid both highlight and mid-tone sliders to the point where detail was revealed - more on this in a bit - making sure that nothing below the horizon became blown out. Then I made a large rectangular selection covering most of the sky but stopping some way short of the horizon, which I then feathered by 250 pixels. Running the history brush over the whole picture restored the sky to its previous values and this allowed me to then adjust the sky as a separate entity. I dragged the highlight slider to the point where the highlights in the clouds were about to burn out and then dragged the 'lowlight' slider to the point where I was happy with the contrast between sky and cloud. Finally, I used the lasso tool and made a selection at the bottom of the picture. The selection was more or less level with the wheat in the foreground in the middle but the top of the selection curved upward at both ends to cover the shadowy areas there. I feathered this by 150 pixels and adjusted the levels in such a way that details were revealed but without the tone being as light as the sun-lit parts of the picture.
Once the presence of the wheat in the foreground was revealed more clearly the picture, for me, gained a greater sense of harmony as it gives the viewer a better idea of exactly what it is that we are looking at. I also helps tie in foreground, mid-ground and distance.
I'm all in favour of your bold composition; the dominance of the sky puts me in mind of Dutch Renaissance and Baroque painters. In particular I am reminded of 'View Of Harlem From The Dunes At Overeen' by Jacob van Ruisdael.
Please let me know if you would like me to post my version of your picture and then take it down again once you have seen it.