The x-ray of this painting shows that Van Gogh reworked it some time later. He painted a small group in the centre foreground over a farmer with a spade. He also added the churchgoers in front of the door, and the autumn leaves on the trees and bushes.
Van Gogh used lighter colours for his additions. They are complementary colours which reinforce each other. The yellowy-orange of the autumn leaves goes well with the blue of the background, for example.
Researchers therefore believe that he made the changes just over eighteen months later, in autumn 1885. Until then, he rarely used colour combinations of that kind.