Did you try taking the same photo with less sky portion? Backlight is an HDR mode that is activated when there's a high contrast between picture parts. You are trying to take a shot of a bright sky with a portion of dark grass. HDR shots will take multiple frames at different exposure and combine them into one shot. Grass is dynamic of course and will be in a different position (from wind) in every frame of the HDR shot, and this will produce a hazy grass look like the one you got.
My advice: Less sky, take the picture in late afternoon, use manual mode and tweak the options, use landscape mode.
