I really like this image, and I can't explain why. That doesn't make any sense, does it? ;o) I love the yellow and the composition is nice. The contrasts are great.
Your selective desaturization is nicely done. But I really want to see the person's face! The background appears a but "muddy" with all middle values - no strong blacks or whites.
A really great picture to use for this challenge. And unusual. And imaginative! Only off point is the napkin is extremly bright and draws away from the yellow corn. Focus is a little soft, but, it's still and excellent take. Nice workmanship desaturating the background. Rated 8.