The field details nicely balance the clouds so everything comes together well.
It's the curved shapes of the farmed rows and the clouds that make this image for me. They almost imply motion in a nearly impressionistic sort of way. Very, very nice!
Gorgeous image as always... It's the beautiful light and composition that I adore.
I agree with what others have already said, it is the large flowing S-curve between the clouds and rows that make this shot. Combined with the sensuous winter colours, it is a real winner for me. I am glad you posted it in a large size, Trevor: when viewed in lightbox it almost feels like I am standing in that field.