Gorgeous. I like the way you focus on just a few, yet allow us to sense the magnitude of the full fiel and the large appetite that is too be met by this crop. A 10. This is going on my list of favorites.
Wheat, or is this oats?, are a fascinating subject. This image had a lot of potential. I'm afraid it is to bright, over exposed to be really effective. THe foreground element is not detailed enough, maybe it's just too under lit, to pull off being the star, which is what it's placement suggets it to be. The dof could work here with a little more light in the foreground, using different settings to not have the rest too bright, or possible some post processing work to alter the light - epxosure. Good effort.
I like the subject, but am not wild about the composition. I think the length and shape of the grain could be used to strengthen the composition, maybe having some prevalent diagonals. There doesn't seem to be much form to the subject here, and imho, the more interesting subject is the taller strand to the left, though the focus is on the center. The exposure itself is good (though a little oversharpened).
There are a lot of jagged lines here, probably caused by resizing and sharpening too much. Try using a different resample method such as bicubic. ALso adding some contrast would give the image more "pop"