I'm new to the Critique Club and this photo came up as one of the first for my critique.
This is a bold and dramatic image. Shooting directly into the light with the placement of the sun/sunburst behind the tree creates a striking center of attention. It also defines a very difficult lighting tableau to photograph effectively. I think you've attempted to address the challenging light with HDR processing.
For my taste, the overall intensity of the processing is too extreme and creates several competing elements that seem to be vying for attention. For example, the deep blue sky at the top of the frame accentuates the HDR halo effect behind the tree. There is also a dramatic color temperature shift from the deep cool blues at top of the sky to the golden warmth of the clouds on the horizon and the crop directly behind the tree, which feels quite unnatural to me. While there are several interesting aspects to the scene, I just can't seem to grasp it as a whole, cohesive image.
A note about the composition - You've placed the sun almost exactly at the lower left intersection of traditional "rule of thirds" lines. I think that combining the brightest area of the image with this powerful compositional positioning tends to bring the viewer's eye to rest directly on the sunburst and places great weight on the lower left corner of the image.
All that said, I understand that your intent may have been to express the intense drama and variety of light throughout the scene - you've certainly done that. It's full of color and passion. Personally, I find the warm yellow-green color and highlights of the crop growing behind the tree to be among the most attractive part of the scene. When taken as a single isolated component of the photo, I think it's a very pleasing bit of processing.