The composition is beautiful at times; I particularly like choir introduction at 2:00. The instrumentation is solid and fits the art that inspired you. Some of the chord combinations and the orchestration effectively reflect the beauty and elegance found in the art. I really like the phrasing of the piano and the addition of the glockenspiel.
There are times when I'm not sure what the song is trying to portray and it feels emotionally neutral. :40 to 1:05 is a good example of this. It feels like filler to me, and it diminishes the song's replayability.
Through the music, I wanted to learn more about the subjects of the painting. What kind of woman is she, and what's going on in her life? Is this merely a painting of a woman at a farm or is someone, perhaps a lover, thinking about her and their shared experience on a farm? These questions could be answered to some extent with certain chord progressions and melodic techniques. The song's relation to the art feels a little too vague for me.
Some instruments, such as the guitar and harp, sound a little muddy. Some EQing and maybe dynamic EQ could help clear that up. I also think the piano could benefit from a slightly brighter sound from EQ work.
I mostly enjoy how you wrote for the strings, though I think some more articulations could be nice. I found a few places, such as the very ending, where I think trills could add some nice color.
The introduction and outro are excellent. I was drawn into the song immediately, and although I didn't love everything in the middle, the outro was satisfying.
Gl in the contest!