Nice. I like the last 2 a lot. Looks like you had some SUPER bright midday sun on those first ones... washed out some of the details, which is a bummer as it looks like you have some great composition on them.
I like the first but wonder why you you cropped it in the way you did? I would have liked to see some more of the cropped off above, but there may have been a fence or so? You could not take the field somehow "drifting out of the photo in the far distance" (do I make myself understood???)