Awesome shot. The contrast between the ground and sky makes this. I like the choice to show more of the sky rather than the field as well - makes for a different approach.
gorgeous scenery... processing is a little bit too heavy for my tastes - too much black & a bit too much saturation in the yellows (despite this being the yellow challenge)
I love that you went out and found a beautiful field of yellow flowers. If you could have taken the photo is such a way that you could see the lines the rows made a little more clearly I think it would keep my attention a little longer. Still a beautiful subject.